EXHIBIT 4.17

- --------------------------------------------------------------------------------

                   PREFERRED SECURITIES GUARANTEE AGREEMENT
                           MOTOROLA CAPITAL TRUST I



                         Dated as of February 3, 1999

 
                            CROSS REFERENCE TABLE*


Section of Trust                                                      Section of
Indenture Act of                                                       Guarantee
1939, as amended                                                       Agreement
- ----------------                                                       ---------

310(a)....................................................................4.1(a)
310(b)....................................................................4.1(c)
310(c).............................................................Inapplicable
311(a)....................................................................2.2(b)
311(b)....................................................................2.2(b)
311(c).............................................................Inapplicable
312(a)....................................................................2.2(a)
312(b)....................................................................2.2(b)
312(c)......................................................................2.9
313(a)......................................................................2.3
313(b)......................................................................2.3
313(c)......................................................................2.3
313(d)......................................................................2.3
314(a)......................................................................2.4
314(b).............................................................Inapplicable
314(c)......................................................................2.5
314(d).............................................................Inapplicable
314(e)......................................................................2.5
314(f).............................................................Inapplicable
315(a)............................................................3.1(d); 3.2(a)
315(b)....................................................................2.7(a)
315(c)....................................................................3.1(c)
315(d)....................................................................3.1(d)
316(a)...............................................................2.6; 5.4(a)
317(a).................................................................2.10; 5.4
318(a)....................................................................2.1(b)

* This Cross-Reference Table does not constitute part of the Guarantee Agreement
and shall not have any bearing  upon the  interpretation  of any of its terms or
provisions.

                                       i

 
                               TABLE OF CONTENTS

 
 
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                                                                                                 ----
                                                                                                
ARTICLE I   INTERPRETATION AND DEFINITIONS........................................................  1
     SECTION I.1  Interpretation and Definitions..................................................  1
ARTICLE II  TRUST INDENTURE ACT...................................................................  3
     SECTION II.1 Trust Indenture Act; Application................................................  3
     SECTION II.2 Lists of Holders of Preferred Securities........................................  3
     SECTION II.3 Reports by Preferred Guarantee Trustee..........................................  4
     SECTION II.4 Periodic Reports to Preferred Guarantee Trustee.................................  4
     SECTION II.5 Evidence of Compliance with Conditions Precedent................................  4
     SECTION II.6 Guarantee Event of Default; Waiver..............................................  4
     SECTION II.7 Guarantee Event of Default; Notice..............................................  5
     SECTION II.8 Conflicting Interests...........................................................  5
ARTICLE III POWERS, DUTIES AND RIGHTS OF PREFERRED GUARANTEE TRUSTEE..............................  5
     SECTION III.1 Powers and Duties of Preferred Guarantee Trustee...............................  5
     SECTION III.2 Certain Rights of Preferred Guarantee Trustee..................................  6
     SECTION III.3 Not Responsible for Recitals or Issuance of Guarantee..........................  8
ARTICLE IV  PREFERRED GUARANTEE TRUSTEE...........................................................  8
     SECTION IV.1  Preferred Guarantee Trustee; Eligibility.......................................  8
     SECTION IV.2  Appointment, Removal and Resignation of Preferred Guarantee Trustee............  8
ARTICLE V   GUARANTEE.............................................................................  9
     SECTION V.1   Guarantee......................................................................  9
     SECTION V.2   Waiver of Notice and Demand....................................................  9
     SECTION V.3   Obligations Not Affected.......................................................  9
     SECTION V.4   Rights of Holders..............................................................  10
     SECTION V.5   Guarantee of Payment...........................................................  10
     SECTION V.6   Subrogation....................................................................  10
ARTICLE VI  LIMITATION OF TRANSACTIONS; SUBORDINATION.............................................  11
     SECTION VI.1  Limitation of Transactions.....................................................  11
     SECTION VI.2  Ranking........................................................................  11
ARTICLE VII TERMINATION...........................................................................  11
     SECTION VII.1 Termination....................................................................  12
ARTICLE VIII INDEMNIFICATION......................................................................  12
     SECTION VIII.1 Exculpation...................................................................  12
     SECTION VIII.2 Indemnification...............................................................  12
ARTICLE IX   [INTENTIONALLY OMITTED]..............................................................  12
ARTICLE X    MISCELLANEOUS........................................................................  12
     SECTION X.1  Successors and Assigns..........................................................  12
     SECTION X.2  Amendments......................................................................  12
     SECTION X.3  Notices.........................................................................  13
     SECTION X.4  Benefit.........................................................................  13
     SECTION X.5  Governing Law...................................................................  13


                                      ii

 
                   PREFERRED SECURITIES GUARANTEE AGREEMENT

     This GUARANTEE AGREEMENT (the "Preferred Securities Guarantee"), dated as
of February 3, 1999, is executed and delivered by Motorola, Inc., a Delaware
corporation (the "Guarantor"), and Harris Trust and Savings Bank, as trustee
(the "Preferred Guarantee Trustee"), for the benefit of the Holders (as defined
herein) from time to time of the Preferred Securities (as defined herein) of
Motorola Capital Trust I, a Delaware statutory business trust (the "Issuer").

     WHEREAS, pursuant to the Declaration (as defined herein), the Issuer is
issuing up to 20,000,000 preferred securities, having an aggregate liquidation
amount of $500,000,000,  designated the 6.68% Trust Originated Preferred
Securities (the "Preferred Securities").

     WHEREAS, as incentive for the Holders to purchase the Preferred Securities,
the Guarantor desires irrevocably and unconditionally to agree, to the extent
set forth in this Preferred Securities Guarantee, to pay to the Holders of the
Preferred Securities the Guarantee Payments (as defined herein) and to make
certain other payments on the terms and conditions set forth herein.

     NOW, THEREFORE, in consideration of the purchase by each Holder of
Preferred Securities, which purchase the Guarantor hereby agrees shall benefit
the Guarantor, the Guarantor executes and delivers this Preferred Securities
Guarantee for the benefit of the Holders.

                                   ARTICLE I
                        INTERPRETATION AND DEFINITIONS

     SECTION I.1   Interpretation and Definitions.
                   ------------------------------ 

     In this Preferred Securities Guarantee, unless the context otherwise
requires:

     (a) capitalized terms used in this Preferred Securities Guarantee but not
defined in the preamble above have the respective meanings assigned to them in
this Section 1.1 or as otherwise defined herein;

     (b) a term defined anywhere in this Preferred Securities Guarantee has the
same meaning throughout;

     (c) all references to "the Preferred Securities Guarantee" or "this
Preferred Securities Guarantee" are to this Preferred Securities Guarantee as
modified, supplemented or amended from time to time;

     (d) all references in this Preferred Securities Guarantee to Articles and
Sections are to Articles and Sections of this Preferred Securities Guarantee,
unless otherwise specified;

     (e) a term defined in the Trust Indenture Act has the same meaning when
used in this Preferred Securities Guarantee unless otherwise defined in this
Preferred Securities Guarantee or unless the context otherwise requires; and

     (f) a reference to the singular includes the plural and vice versa.

     "Affiliate" has the same meaning as given to that term in Rule 405 of the
Securities Act of 1933, as amended, or any successor rule thereunder.

     "Base Indenture" means the Indenture dated February 3, 1999 among the
Guarantor (the "Debenture Issuer") and Harris Trust and Savings Bank, as
trustee.

     "Business Day" means any day other than a day on which banking institutions
in New York, New York or in the city of the Corporate Trust Office are
authorized or required by law to close.

     "Common Securities" means the securities representing common undivided
beneficial interests in the assets of the Issuer.

                                       1

 
     "Corporate Trust Office" means the office of the Preferred Guarantee
Trustee at which the corporate trust business of the Preferred Guarantee Trustee
shall, at any particular time, be principally administered, which office at the
date of execution of this Preferred Securities Guarantee is located at 311 West
Monroe Street, 12th Floor, Chicago, Illinois, 60606, Attention: Corporate Trust
Administration.

     "Covered Person" means any Holder or beneficial owner of Preferred
Securities.

     "Debentures" means the series of subordinated deferrable interest
debentures to be issued by the Guarantor designated the 6.68% Deferrable
Interest Junior Subordinated Debentures due 2039 held by the Property Trustee
(as defined in the Declaration) of the Issuer.

     "Declaration" means the Amended and Restated Declaration of Trust, dated as
of February 3, 1999, as amended, modified or supplemented from time to time,
among the trustees of the Issuer named therein, the Guarantor, as sponsor, and
the Holders from time to time of undivided beneficial interests in the assets of
the Issuer.

     "Guarantee Event of Default" means a default by the Guarantor on any of its
payment or other obligations under this Preferred Securities Guarantee.

     "Guarantee Payments" means the following payments or distributions, without
duplication, with respect to the Preferred Securities, to the extent not paid or
made by the Issuer: (i) any accrued and unpaid Distributions (as defined in the
Declaration) that are required to be paid on the Preferred Securities to the
extent the Issuer shall have funds available therefor, (ii) the redemption
price, including all accrued and unpaid Distributions to the date of redemption
(the "Redemption Price") to the extent the Issuer has funds available therefor,
with respect to any Preferred Securities called for redemption by the Issuer and
(iii) upon a voluntary or involuntary dissolution, winding-up or termination of
the Issuer (other than in connection with the distribution of Debentures to the
Holders in exchange for Preferred Securities as provided in the Declaration or
the redemption of all the Preferred Securities upon maturity or redemption of
the Debentures as provided in the Declaration), the lesser of (a) the aggregate
of the liquidation amount and all accrued and unpaid Distributions on the
Preferred Securities to the date of payment, to the extent the Issuer shall have
funds available therefor or (b) the amount of assets of the Issuer remaining
available for distribution to Holders in liquidation of the Issuer (in either
case, the "Liquidation Distribution").  If an Event of Default (as defined in
the Declaration) has occurred and is continuing, the rights of holders of the
Common Securities to receive payments are subordinated to the rights of Holders
of Preferred Securities to receive Guarantee Payments under this Preferred
Securities Guarantee.

     "Holder" shall mean any holder, as registered on the books and records of
the Issuer of any Preferred Securities; provided, however, that, in determining
whether the holders of the requisite percentage of Preferred Securities have
given any request, notice, consent or waiver hereunder, "Holder" shall not
include the Guarantor or any Affiliate of the Guarantor; provided further, that
in determining whether the Holders of the requisite liquidation amount of
Preferred Securities have voted on any matter provided for in this Preferred
Securities Guarantee, then for the purpose of such determination only (and not
for any other purpose hereunder), if the Preferred Securities remain in the form
of one or more Global Certificates (as defined in the Declaration), the term
"Holders" shall mean the holder of the Global Certificate acting at the
direction of the Preferred Security Beneficial Owners (as defined in the
Declaration).

     "Indemnified Person" means the Preferred Guarantee Trustee, any Affiliate
of the Preferred Guarantee Trustee, or any officers, directors, shareholders,
members, partners, employees, representatives, nominees, custodians or agents of
the Preferred Guarantee Trustee.

     "Indenture" means the Base Indenture and any indenture supplemental thereto
pursuant to which the Debentures are to be issued to the Property Trustee (as
defined in the Declaration) of the Issuer.

     "LYONS(TM)" means Debt of the Company in respect of the Company's Liquid
Yield Option(TM) Notes due 2009 (the "2009 LYONs") and the Company's Liquid
Yield Option(TM) Notes due 2013 ("the 2013 LYONs").

     "Majority in Liquidation Amount of the Preferred Securities" means, except
as provided in the terms of the Preferred Securities or by the Trust Indenture
Act, Holder(s) of outstanding Preferred Securities, voting separately as a
class, who are the record holders of more than 50% of the aggregate liquidation
amount (including the stated amount 

                                       2

 
that would be paid on redemption, liquidation or otherwise, plus accrued and
unpaid Distributions to the date upon which the voting percentages are
determined) of all outstanding Preferred Securities. In determining whether the
Holders of the requisite amount of Preferred Securities have voted, Preferred
Securities which are owned by the Guarantor or any Affiliate of the Guarantor or
any other obligor on the Preferred Securities shall be disregarded (to the
extent known to be so owned by the Preferred Guarantee Trustee) for the purpose
of any such determination.

     "Officers' Certificate" means, with respect to any Person, a certificate
signed by two Authorized Officers (as defined in the Declaration) of such
Person.  Any Officers' Certificate delivered with respect to compliance with a
condition or covenant provided for in this Preferred Securities Guarantee shall
include: (a) a statement that each officer signing the Officers' Certificate has
read the covenant or condition and the definitions relating thereto; (b) a brief
statement of the nature and scope of the examination or investigation undertaken
by each officer in rendering the Officers' Certificate; (c) a statement that
each such officer has made such examination or investigation as, in such
officer's opinion, is necessary to enable such officer to express an informed
opinion as to whether or not such covenant or condition has been complied with;
and (d) a statement as to whether, in the opinion of each such officer, such
condition or covenant has been complied with.

     "Person" means any individual, corporation, estate, partnership, joint
venture, association, joint stock company, limited liability company, trust,
unincorporated association, or government or any agency or political subdivision
thereof, or any other entity of whatever nature.

     "Preferred Guarantee Trustee" means Harris Trust and Savings Bank until a
Successor Preferred Guarantee Trustee has been appointed and has accepted such
appointment pursuant to the terms of this Preferred Securities Guarantee and
thereafter means each such Successor Preferred Guarantee Trustee.

     "Responsible Officer" means, with respect to the Preferred Guarantee
Trustee, any officer whose principal office is the Corporate Trust Office of the
Preferred Guarantee Trustee, including any vice-president, any assistant vice-
president, the secretary, any assistant secretary, the treasurer, any assistant
treasurer or other officer whose principal office is the Corporate Trust Office
of the Preferred Guarantee Trustee customarily performing functions similar to
those performed by any of the above designated officers and also means, with
respect to a particular corporate trust matter, any other officer to whom such
matter is referred because of that officer's knowledge of and familiarity with
the particular subject.

     "Successor Preferred Guarantee Trustee" means a successor Preferred
Guarantee Trustee possessing the qualifications to act as Preferred Guarantee
Trustee under Section 4.1.

     "Trust Indenture Act" means the Trust Indenture Act of 1939, as amended
from time to time, or any successor legislation.

                                  ARTICLE II
                              TRUST INDENTURE ACT

     SECTION II.1   Trust Indenture Act; Application.
                    -------------------------------- 

     (a) This Preferred Securities Guarantee is subject to the provisions of the
Trust Indenture Act that are required to be part of this Preferred Securities
Guarantee and shall, to the extent applicable, be governed by such provisions.

     (b) If and to the extent that any provision of this Preferred Securities
Guarantee limits, qualifies or conflicts with the duties imposed by Sections 310
to 317, inclusive, of the Trust Indenture Act, such imposed duties shall
control.

     SECTION II.2   Lists of Holders of Preferred Securities.
                    ---------------------------------------- 

     (a) The Guarantor shall provide the Preferred Guarantee Trustee with a
list, in such form as the Preferred Guarantee Trustee may reasonably require, of
the names and addresses of the Holders of the Preferred Securities ("List 

                                       3

 
of Holders"), (i) within one Business Day after January 1 and June 30 of each
year and current as of such date and (ii) at any other time, within 30 days of
receipt by the Guarantor of a written request from the Preferred Guarantee
Trustee for a List of Holders as of a date no more than 14 days before such List
of Holders is given to the Preferred Guarantee Trustee; provided, that the
Guarantor shall not be obligated to provide such List of Holders at any time
when the List of Holders does not differ from the most recent List of Holders
given to the Preferred Guarantee Trustee by the Guarantor. The Preferred
Guarantee Trustee shall preserve, in as current a form as is reasonably
practicable, all information contained in Lists of Holders given to it, provided
that it may destroy any List of Holders previously given to it on receipt of a
new List of Holders.

          (b) The Preferred Guarantee Trustee shall comply with its obligations
under Section 311(a), 311(b) and Section 312(b) of the Trust Indenture Act.

     SECTION II.3   Reports by Preferred Guarantee Trustee.  Within 60 days
                    --------------------------------------                 
after May 15 of each year (commencing with the year of the first anniversary of
the issuance of the Preferred Securities), the Preferred Guarantee Trustee shall
provide to the Holders of the Preferred Securities such reports as are required
by Section 313 of the Trust Indenture Act, if any, in the form and in the manner
provided by Section 313 of the Trust Indenture Act.  The Preferred Guarantee
Trustee shall also comply with the requirements of Section 313(d) of the Trust
Indenture Act.

     SECTION II.4   Periodic Reports to Preferred Guarantee Trustee.  The
                    -----------------------------------------------      
Guarantor shall provide to the Preferred Guarantee Trustee such documents,
reports and information as required by Section 314 of the Trust Indenture Act
(if any) and the compliance certificate required by Section 314 of the Trust
Indenture Act in the form, in the manner and at the times required by Section
314 of the Trust Indenture Act.

     SECTION II.5   Evidence of Compliance with Conditions Precedent.  The
                    ------------------------------------------------      
Guarantor shall provide to the Preferred Guarantee Trustee such evidence of
compliance with any conditions precedent provided for in this Preferred
Securities Guarantee that relate to any of the matters set forth in Section
314(c) of the Trust Indenture Act.  Any certificate or opinion required to be
given by an officer pursuant to Section 314(c)(1) may be given in the form of an
Officers' Certificate.

     SECTION II.6   Guarantee Event of Default; Waiver.  The Holders of a
                    ----------------------------------                   
Majority in Liquidation Amount of the Preferred Securities may, by vote, on
behalf of the Holders of all of the Preferred Securities, waive any past
Guarantee Event of Default and its consequences.  Upon such waiver, any such
Guarantee Event of Default shall cease to exist, and any Guarantee Event of
Default arising therefrom shall be deemed to have been cured, for every purpose
of this Preferred Securities Guarantee, but no such waiver shall extend to any
subsequent or other default or Guarantee Event of Default or impair any right
consequent thereon.

     SECTION II.7   Guarantee Event of Default; Notice.
                    ---------------------------------- 

     (a) The Preferred Guarantee Trustee shall, within 90 days after the
occurrence of a Guarantee Event of Default, transmit by mail, first class
postage prepaid, to the Holders of the Preferred Securities, notices of all
Guarantee Events of Default actually known to a Responsible Officer of the
Preferred Guarantee Trustee, unless such defaults have been cured before the
giving of such notice; provided, that the Preferred Guarantee Trustee shall be
protected in withholding such notice if and so long as a Responsible Officer of
the Preferred Guarantee Trustee in good faith determines that the withholding of
such notice is in the interests of the Holders of the Preferred Securities.

     (b) The Preferred Guarantee Trustee shall not be deemed to have knowledge
of any Guarantee Event of Default unless the Preferred Guarantee Trustee shall
have received written notice thereof, or a Responsible Officer of the Preferred
Guarantee Trustee charged with the administration of the Declaration shall have
obtained actual knowledge thereof.

     SECTION II.8   Conflicting Interests.  The Declaration shall be deemed to
                    ---------------------                                     
be specifically described in this Preferred Securities Guarantee for the
purposes of clause (i) of the first proviso contained in Section 310(b) of the
Trust Indenture Act.

                                       4

 
                                  ARTICLE III
           POWERS, DUTIES AND RIGHTS OF PREFERRED GUARANTEE TRUSTEE

     SECTION III.1   Powers and Duties of Preferred Guarantee Trustee.
                     ------------------------------------------------ 

     (a) This Preferred Securities Guarantee shall be held by the Preferred
Guarantee Trustee on behalf of the Issuer for the benefit of the Holders of the
Preferred Securities, and the Preferred Guarantee Trustee shall not transfer
this Preferred Securities Guarantee to any Person except a Holder of Preferred
Securities exercising the rights of such Holder pursuant to Section 5.4(b) or to
a Successor Preferred Guarantee Trustee on acceptance by such Successor
Preferred Guarantee Trustee of its appointment to act as Successor Preferred
Guarantee Trustee.  The right, title and interest of the Preferred Guarantee
Trustee in and to this Preferred Securities Guarantee shall automatically vest
in any Successor Preferred Guarantee Trustee, and such vesting and cessation of
title shall be effective whether or not conveyancing documents have been
executed and delivered pursuant to the appointment of such Successor Preferred
Guarantee Trustee.

     (b) If a Guarantee Event of Default actually known to a Responsible Officer
of the Preferred Guarantee Trustee has occurred and is continuing, the Preferred
Guarantee Trustee shall enforce this Preferred Securities Guarantee for the
benefit of the Holders of the Preferred Securities.
 
     (c) The Preferred Guarantee Trustee, before the occurrence of any Guarantee
Event of Default and after the curing of all Guarantee Events of Default that
may have occurred, shall undertake to perform only such duties as are
specifically set forth in this Preferred Securities Guarantee, and no implied
covenants shall be read into this Preferred Securities Guarantee against the
Preferred Guarantee Trustee.  In case a Guarantee Event of Default has occurred
(that has not been cured or waived pursuant to Section 2.6) and is actually
known to a Responsible Officer of the Preferred Guarantee Trustee, the Preferred
Guarantee Trustee shall exercise such of the rights and powers vested in it by
this Preferred Securities Guarantee, and use the same degree of care and skill
in its exercise thereof, as a prudent individual would exercise or use under the
circumstances in the conduct of his or her own affairs.

     (d) No provision of this Preferred Securities Guarantee shall be construed
to relieve the Preferred Guarantee Trustee from liability for its own negligent
action, its own negligent failure to act or its own willful misconduct, except
that:

          (i) prior to the occurrence of any Guarantee Event of Default and
              after the curing or waiving of all such Guarantee Events of
              Default that may have occurred:

              (A) the duties and obligations of the Preferred Guarantee Trustee
                  shall be determined solely by the express provisions of this
                  Preferred Securities Guarantee, and the Preferred Guarantee
                  Trustee shall not be liable except for the performance of such
                  duties and obligations as are specifically set forth in this
                  Preferred Securities Guarantee, and no implied covenants or
                  obligations shall be read into this Preferred Securities
                  Guarantee against the Preferred Guarantee Trustee; and

              (B) in the absence of bad faith on the part of the Preferred
                  Guarantee Trustee, the Preferred Guarantee Trustee may
                  conclusively rely, as to the truth of the statements and the
                  correctness of the opinions expressed therein, upon any
                  certificates or opinions furnished to the Preferred Guarantee
                  Trustee and conforming to the requirements of this Preferred
                  Securities Guarantee; but in the case of any such certificates
                  or opinions that by any provision hereof are specifically
                  required to be furnished to the Preferred Guarantee Trustee,
                  the Preferred Guarantee Trustee shall be under a duty to
                  examine the same to determine whether or not they conform to
                  the requirements of this Preferred Securities Guarantee;

          (ii) the Preferred Guarantee Trustee shall not be liable for any error
               of judgment made in good faith by a Responsible Officer of the
               Preferred Guarantee Trustee, unless it shall be proved 

                                       5

 
               that the Preferred Guarantee Trustee was negligent in
               ascertaining the pertinent facts upon which such judgment was
               made;

        (iii)  the Preferred Guarantee Trustee shall not be liable with respect
               to any action taken or omitted to be taken by it in good faith in
               accordance with the direction of the Holders of not less than a
               Majority in Liquidation Amount of the Preferred Securities
               relating to the time, method and place of conducting any
               proceeding for any remedy available to the Preferred Guarantee
               Trustee, or exercising any trust or power conferred upon the
               Preferred Guarantee Trustee under this Preferred Securities
               Guarantee; and

         (iv)  no provision of this Preferred Securities Guarantee shall require
               the Preferred Guarantee Trustee to expend or risk its own funds
               or otherwise incur personal financial liability in the
               performance of any of its duties or in the exercise of any of its
               rights or powers, if there are reasonable grounds for believing
               that the repayment of such funds or liability is not reasonably
               assured to the Preferred Guarantee Trustee under the terms of
               this Preferred Securities Guarantee or indemnity, reasonably
               satisfactory to the Preferred Guarantee Trustee, against such
               risk or liability is not reasonably assured to it.

     SECTION III.2   Certain Rights of Preferred Guarantee Trustee.
                     --------------------------------------------- 

     (a) Subject to the provisions of Section 3.1:

         (i)   The Preferred Guarantee Trustee may conclusively rely, and shall
               be fully protected in acting or refraining from acting upon, any
               resolution, certificate, statement, instrument, opinion, report,
               notice, request, direction, consent, order, bond, debenture,
               note, other evidence of indebtedness or other paper or document
               believed by it to be genuine and to have been signed, sent or
               presented by the proper party or parties.

         (ii)  Any direction or act of the Guarantor contemplated by this
               Preferred Securities Guarantee shall be sufficiently evidenced by
               an Officers' Certificate.

         (iii) Whenever, in the administration of this Preferred Securities
               Guarantee, the Preferred Guarantee Trustee shall deem it
               desirable that a matter be proved or established before taking,
               suffering or omitting any action hereunder, the Preferred
               Guarantee Trustee (unless other evidence is herein specifically
               prescribed) may, in the absence of bad faith on its part, request
               and conclusively rely upon an Officers' Certificate which, upon
               receipt of such request, shall be promptly delivered by the
               Guarantor.

         (iv)  The Preferred Guarantee Trustee shall have no duty to see to any
               recording, filing or registration of any instrument (or any
               rerecording, refiling or reregistration thereof).

         (v)   Before the Preferred Guarantee Trustee acts or refrains from
               acting, the Preferred Guarantee Trustee may consult with counsel
               and the written advice or opinion of such counsel with respect to
               legal matters shall be full and complete authorization and
               protection in respect of any action taken, suffered or omitted by
               it hereunder in good faith and in accordance with such advice or
               opinion.  Such counsel may be counsel to the Guarantor or any of
               its Affiliates and may include any of its employees.  The
               Preferred Guarantee Trustee shall have the right at any time to
               seek instructions concerning the administration of this Preferred
               Securities Guarantee from any court of competent jurisdiction.

         (vi)  The Preferred Guarantee Trustee shall be under no obligation to
               exercise any of the rights or powers vested in it by this
               Preferred Securities Guarantee at the request or direction of any
               Holder, unless such Holder shall have offered  to the Preferred
               Guarantee Trustee such security and indemnity, reasonably
               satisfactory to the Preferred Guarantee Trustee, against the
               costs, expenses (including attorneys' fees and expenses and the
               expenses of the Preferred 

                                       6

 
                Guarantee Trustee's agents, nominees or custodians) and
                liabilities that might be incurred by it in complying with such
                request or direction, including such reasonable advances as may
                be requested by the Preferred Guarantee Trustee; provided that
                nothing contained in this Section 3.2(a)(vi) shall be taken to
                relieve the Preferred Guarantee Trustee, upon the occurrence of
                a Guarantee Event of Default, of its obligation to exercise the
                rights and powers vested in it by this Preferred Securities
                Guarantee.

         (vii)  The Preferred Guarantee Trustee shall not be bound to make any
                investigation into the facts or matters stated in any
                resolution, certificate, statement, instrument, opinion, report,
                notice, request, direction, consent, order, bond, debenture,
                note, other evidence of indebtedness or other paper or document,
                but the Preferred Guarantee Trustee, in its discretion, may make
                such further inquiry or investigation into such facts or matters
                as it may see fit.

         (viii) The Preferred Guarantee Trustee may execute any of the trusts or
                powers hereunder or perform any duties hereunder either directly
                or by or through agents, nominees, custodians or attorneys, and
                the Preferred Guarantee Trustee shall not be responsible for any
                misconduct or negligence on the part of any agent or attorney
                appointed with due care by it hereunder.

         (ix)   Any action taken by the Preferred Guarantee Trustee or its
                agents hereunder shall bind the Holders of the Preferred
                Securities, and the signature of the Preferred Guarantee Trustee
                or its agents alone shall be sufficient and effective to perform
                any such action. No third party shall be required to inquire as
                to the authority of the Preferred Guarantee Trustee to so act or
                as to its compliance with any of the terms and provisions of
                this Preferred Securities Guarantee, both of which shall be
                conclusively evidenced by the Preferred Guarantee Trustee's or
                its agent's taking such action.

          (x)   Whenever in the administration of this Preferred Securities
                Guarantee the Preferred Guarantee Trustee shall deem it
                desirable to receive instructions with respect to enforcing any
                remedy or right or taking any other action hereunder, the
                Preferred Guarantee Trustee (i) may request instructions from
                the Holders of a Majority in Liquidation Amount of the Preferred
                Securities, (ii) may refrain from enforcing such remedy or right
                or taking such other action until such instructions are received
                and (iii) shall be protected in conclusively relying on or
                acting in accordance with such instructions.

          (xi)  The Preferred Guarantee Trustee shall not be required to give
                any bond or surety in respect of the performance of its powers
                and duties hereunder.

          (xii) The permissive rights of the Preferred Guarantee Trustee to do
                things enumerated in this Indenture shall not be construed as a
                duty.

     (b) No provision of this Preferred Securities Guarantee shall be deemed to
impose any duty or obligation on the Preferred Guarantee Trustee to perform any
act or acts or exercise any right, power, duty or obligation conferred or
imposed on it in any jurisdiction in which it shall be illegal, or in which the
Preferred Guarantee Trustee shall be unqualified or incompetent in accordance
with applicable law, to perform any such act or acts or to exercise any such
right, power, duty or obligation.  No permissive power or authority available to
the Preferred Guarantee Trustee shall be construed to be a duty.

     SECTION III.3   Not Responsible for Recitals or Issuance of Guarantee.  The
                     -----------------------------------------------------      
recitals contained in this Preferred Securities Guarantee shall be taken as the
statements of the Guarantor, and the Preferred Guarantee Trustee does not assume
any responsibility for their correctness.  The Preferred Guarantee Trustee makes
no representation as to the validity or sufficiency of this Preferred Securities
Guarantee.

                                  ARTICLE IV
                          PREFERRED GUARANTEE TRUSTEE

                                       7

 
     SECTION IV.1   Preferred Guarantee Trustee; Eligibility.
                    ---------------------------------------- 

     (a) There shall at all times be a Preferred Guarantee Trustee which shall:

          (i)  not be an Affiliate of the Guarantor; and

          (ii) be a corporation or trust company organized and doing business
               under the laws of the United States of America or any State or
               Territory thereof or of the District of Columbia, or a
               corporation or Person permitted by the Securities and Exchange
               Commission to act as an institutional trustee under the Trust
               Indenture Act, authorized under such laws to exercise corporate
               trust powers, having a combined capital and surplus of at least
               25 million U.S.  dollars ($25,000,000), and subject to
               supervision or examination by Federal, State, Territorial or
               District of Columbia authority.  If such corporation or trust
               company publishes reports of condition at least annually,
               pursuant to law or to the requirements of the supervising or
               examining authority referred to above, then, for the purposes of
               this Section 4.1(a)(ii), the combined capital and surplus of such
               corporation or trust company shall be deemed to be its combined
               capital and surplus as set forth in its most recent report of
               condition so published.

     (b) If at any time the Preferred Guarantee Trustee shall cease to be
eligible to so act under Section 4.1(a), the Preferred Guarantee Trustee shall
immediately resign in the manner and with the effect set out in Section 4.2(c).

     (c) If the Preferred Guarantee Trustee has or shall acquire any
"conflicting interest" within the meaning of Section 310(b) of the Trust
Indenture Act, the Preferred Guarantee Trustee and Guarantor shall in all
respects comply with the provisions of Section 310(b) of the Trust Indenture
Act.

     (d) Any corporation into which the Preferred Guarantee Trustee may be
merged or converted or with which it may be consolidated, or any corporation
resulting from any merger, conversion or consolidation to which the Preferred
Guarantee Trustee shall be a party, or any corporation succeeding to all or
substantially all the corporate trust business of the Preferred Guarantee
Trustee, shall be a Successor Preferred Guarantee Trustee hereunder, provided
such corporation shall be otherwise qualified and eligible under this Article,
without the execution or filing of any paper or any further act on the part of
any of the parties hereto.

     SECTION IV.2   Appointment, Removal and Resignation of Preferred Guarantee
                    -----------------------------------------------------------
Trustee.
- ------- 

     (a) Subject to Section 4.2(b), the Preferred Guarantee Trustee (or
Successor Preferred Guarantee Trustee, as the case may be) may be appointed or
removed without cause at any time by the Guarantor.

     (b) The Preferred Guarantee Trustee (or Successor Preferred Guarantee
Trustee, as the case may be) shall not be removed in accordance with Section
4.2(a) until a Successor Preferred Guarantee Trustee has been appointed and has
accepted such appointment by written instrument executed by such Successor
Preferred Guarantee Trustee and delivered to the Guarantor.

     (c) The Preferred Guarantee Trustee (or Successor Preferred Guarantee
Trustee, as the case may be) appointed to office shall hold office until a
Successor Preferred Guarantee Trustee shall have been appointed or until its
removal or resignation.  The Preferred Guarantee Trustee (or Successor Preferred
Guarantee Trustee, as the case may be) may resign from office (without need for
prior or subsequent accounting) by an instrument in writing executed by the
Preferred Guarantee Trustee (or Successor Preferred Guarantee Trustee, as the
case may be) and delivered to the Guarantor, which resignation shall not take
effect until a Successor Preferred Guarantee Trustee has been appointed and has
accepted such appointment by instrument in writing executed by such Successor
Preferred Guarantee Trustee and delivered to the Guarantor and the resigning
Preferred Guarantee Trustee (or Successor Preferred Guarantee Trustee, as the
case may be).

                                       8

 
     (d) If no Successor Preferred Guarantee Trustee shall have been appointed
and accepted appointment as provided in this Section 4.2 within 60 days after
delivery to the Guarantor of an instrument of resignation, the resigning
Preferred Guarantee Trustee (or Successor Preferred Guarantee Trustee, as the
case may be) may petition any court of competent jurisdiction for appointment of
a Successor Preferred Guarantee Trustee.  Such court may thereupon, after
prescribing such notice, if any, as it may deem proper, appoint a Successor
Preferred Guarantee Trustee.

     (e) No Preferred Guarantee Trustee shall be liable for the acts or
omissions to act of any Successor Preferred Guarantee Trustee.
     (f) Upon termination of this Preferred Securities Guarantee or removal or
resignation of the Preferred Guarantee Trustee (or Successor Preferred Guarantee
Trustee, as the case may be) pursuant to this Section 4.2, the Guarantor shall
pay to the Preferred Guarantee Trustee (or Successor Preferred Guarantee
Trustee, as the case may be) all amounts owing for fees and reimbursement of
expenses which have accrued to the date of such termination, removal or
resignation.

                                   ARTICLE V
                                   GUARANTEE

     SECTION V.1   Guarantee.  The Guarantor irrevocably and unconditionally
                   ---------                                                
agrees to pay in full the Guarantee Payments (without duplication of amounts
theretofore paid by the Issuer), as and when due, to the Holders of record as of
the date upon which such Guarantee Payments are due, regardless of any defense,
right of set-off or counterclaim that the Issuer may have or assert.  The
Guarantor's obligation to make a Guarantee Payment may be satisfied by direct
payment of the required amounts by the Guarantor to the Holders or by causing
the Issuer to pay such amounts to the Holders.

     SECTION V.2   Waiver of Notice and Demand. The Guarantor hereby waives
                   ---------------------------                             
notice of acceptance of this Preferred Securities Guarantee and of any liability
to which it applies or may apply, presentment, demand for payment, any right to
require a proceeding first against the Issuer or any other Person before
proceeding against the Guarantor, protest, notice of nonpayment, notice of
dishonor, notice of redemption and all other notices and demands.
Notwithstanding anything to the contrary herein, the Guarantor retains all of
its rights to (i) extend the interest payment period on the Debentures and the
Guarantor shall not be obligated hereunder to make any Guarantee Payments during
any Extended Interest Payment Period (as defined in the Indenture) with respect
to the Distributions (as defined in the Declaration) on the Preferred Securities
and (ii) redeem or change the maturity date of the Debentures, in each case to
the extent permitted by the Indenture.

     SECTION V.3   Obligations Not Affected.  The obligations, covenants,
                   ------------------------                              
agreements and duties of the Guarantor under this Preferred Securities Guarantee
shall be absolute and unconditional and shall remain in full force and effect
until the entire liquidation amount of all outstanding Preferred Securities
shall have been paid and such obligation shall in no way be affected or impaired
by reason of the happening from time to time of any event, including without
limitation, the following, whether or not with notice to, or the consent of, the
Guarantor:

     (a) The release or waiver, by operation of law or otherwise, of the
performance or observance by the Issuer of any express or implied agreement,
covenant, term or condition relating to the Preferred Securities to be performed
or observed by the Issuer;

     (b) The extension of time for the payment by the Issuer of all or any
portion of the Distributions, Redemption Price, Liquidation Distribution or any
other sums payable under the  terms of the Preferred Securities or the extension
of time for the performance of any other obligation under, arising out of, or in
connection with, the Preferred Securities (other than an extension of time for
payment of Distributions, Redemption Price, Liquidation Distribution or other
sum payable that results from the extension of any interest payment period on
the Debentures or any change to the maturity date of the Debentures permitted by
the Indenture);

     (c) Any failure, omission, delay or lack of diligence on the part of the
Property Trustee or the Holders to enforce, assert or exercise any right,
privilege, power or remedy conferred on the Property Trustee or the Holders
pursuant to the terms of the Preferred Securities, or any action on the part of
the Issuer granting indulgence or extension of any kind;

                                       9

 
     (d) The voluntary or involuntary liquidation, dissolution, sale of any
collateral, receivership, insolvency, bankruptcy, assignment for the benefit of
creditors, reorganization, arrangement, composition or readjustment of debt of,
or other similar proceedings affecting, the Issuer or any of the assets of the
Issuer;

     (e) Any invalidity of, or defect or deficiency in, the Preferred
Securities;

     (f) The settlement or compromise of any obligation guaranteed hereby or
hereby incurred; or

     (g) Any other circumstance whatsoever that might otherwise constitute a
legal or equitable discharge or defense of a guarantor, it being the intent of
this Section 5.3 that the obligations of the Guarantor hereunder shall be
absolute and unconditional under any and all circumstances.

There shall be no obligation of the Preferred Guarantee Trustee or the Holders
to give notice to, or obtain consent of, the Guarantor or any other Person with
respect to the happening of any of the foregoing.  No set-off, counterclaim,
reduction or diminution of any obligation, or any defense of any kind or nature
that the Guarantor has or may have against any Holder shall be available
hereunder to the Guarantor against such Holder to reduce the payments to it
under this Preferred Securities Guarantee.

     SECTION V.4   Rights of Holders.
                   ----------------- 

     (a) The Holders of a Majority in Liquidation Amount of the Preferred
Securities have the right to direct the time, method and place of conducting any
proceeding for any remedy available to the Preferred Guarantee Trustee in
respect of this Preferred Securities Guarantee or to direct the exercise of any
trust or power conferred upon the Preferred Guarantee Trustee under this
Preferred Securities Guarantee.

     (b) If the Preferred Guarantee Trustee fails to enforce this Preferred
Securities Guarantee, then any Holder of Preferred Securities may institute a
legal proceeding directly against the Guarantor to enforce the Preferred
Guarantee Trustee's rights under this Preferred Securities Guarantee without
first instituting a legal proceeding against the Issuer, the Preferred Guarantee
Trustee or any other Person or entity.  Notwithstanding the foregoing, if the
Guarantor has failed to make a Guarantee Payment, a Holder of Preferred
Securities may directly institute a proceeding against the Guarantor for
enforcement of the Preferred Securities Guarantee for such payment to the Holder
of the Preferred Securities of the principal of or interest on the Debentures on
or after the respective due dates specified in the Debentures, and the amount of
the payment will be based on the Holder's pro rata share of the amount due and
owing on all of the Preferred Securities.  The Guarantor hereby waives any right
or remedy to require that any action on this Preferred Securities Guarantee be
brought first against the Issuer or any other Person or entity before proceeding
directly against the Guarantor.

     SECTION V.5   Guarantee of Payment.  This Preferred Securities Guarantee
                   --------------------                                      
creates a guarantee of payment and not of collection.

     SECTION V.6   Subrogation.  The Guarantor shall be subrogated to all (if
                   -----------                                               
any) rights of the Holders of Preferred Securities against the Issuer in respect
of any amounts paid to such Holders by the Guarantor under this Preferred
Securities Guarantee; provided, however, that the Guarantor shall not (except to
the extent required by mandatory provisions of law) be entitled to enforce or
exercise any right that it may acquire by way of subrogation or any indemnity,
reimbursement or other agreement, in all cases as a result of payment under this
Preferred Securities Guarantee, if, at the time of any such payment, any amounts
are due and unpaid under this Preferred Securities Guarantee.  If any amount
shall be paid to the Guarantor in violation of the preceding sentence, the
Guarantor agrees to hold such amount in trust for the Holders and to pay over
such amount to the Preferred Guarantee Trustee for the benefit of the Holders.

     SECTION V.7   Independent Obligations.  The Guarantor acknowledges that its
                   -----------------------                                      
obligations hereunder are independent of the obligations of the Issuer with
respect to the Preferred Securities, and that the Guarantor shall be liable as
principal and as debtor hereunder to make Guarantee Payments pursuant to the
terms of this Preferred Securities Guarantee notwithstanding the occurrence of
any event referred to in subsections (a) through (g), inclusive, of Section 5.3
hereof.

                                       10

 
     SECTION V.8   Waiver Under Indenture and Declaration.  Any waiver by the
                   --------------------------------------                    
Holders of any right under the Indenture or the Declaration shall constitute a
waiver of their rights hereunder to the full extent of such waiver.

                                  ARTICLE VI
                   LIMITATION OF TRANSACTIONS; SUBORDINATION

     SECTION VI.1   Limitation of Transactions.  So long as any Preferred
                    --------------------------                           
Securities remain outstanding, if there shall have occurred a Guarantee Event of
Default or an event of default under the Declaration, then, prior to the payment
of all accrued interest on outstanding Debentures, the Guarantor may not (a)
declare or pay dividends on, make a distribution with respect to, or redeem,
purchase, acquire or make a liquidation payment with respect to, any of its
capital stock, (b) make any payment of interest, principal or premium, if any,
on, or repay, repurchase or redeem, any debt securities issued by the Guarantor
that rank equal with or junior to the Debentures or (c) make  guarantee payments
with respect to the foregoing (other than as set forth in this Preferred
Securities Guarantee); provided, however, that the restriction in clause (a)
does not apply to (i) purchases or acquisitions of the Guarantor's capital stock
in connection with the satisfaction of its obligations under any employee
benefit plans, stock option plans, employee stock purchase plans or direct
reinvestment plans as may be in effect from time to time or the satisfaction of
its obligations pursuant to any contract or security outstanding on the date of
such event requiring the Guarantor to purchase its capital stock (other than a
contractual obligation ranking equal with or junior to the Debentures), (ii)
reclassifications of the Guarantor's capital stock or the exchange or conversion
of one class or series of the Guarantor's capital stock, provided that such
reclassification, exchange or conversion does not result in a change in the
priority vis-a-vis the Preferred Securities of any class or series of capital
stock that is being so reclassified or that is the subject of such exchange or
conversion, (iii) purchases of fractional interests in shares of the Guarantor's
capital stock pursuant to the conversion or exchange provisions of such capital
stock or the security bring converted or exchanged, (iv) stock dividends paid by
the Guarantor where the dividend stock is the same stock as that on which the
dividend is being paid or (v) redemptions or purchases of any rights pursuant to
purchase rights contained in any rights agreement as shall be in effect from
time to time, which purchase rights are substantially similar to those contained
in the Guarantor's current rights agreement.

     SECTION VI.2   Ranking.  This Preferred Securities Guarantee will
                    -------                                           
constitute an unsecured obligation of the Guarantor and will rank (i)
subordinate and junior in right of payment to all other liabilities of the
Guarantor, including all series of the Guarantor's outstanding LYONSTM, except
those liabilities of the Guarantor made equal or subordinate by their terms,
(ii) equal with the most senior preferred or preference stock now or hereafter
issued by the Guarantor and with any guarantee now or hereafter entered into by
the Guarantor in respect of any preferred or preference stock of any Affiliate
of the Guarantor, (iii) senior to the Guarantor's common stock and (iv)
effectively subordinated to the liabilities and obligations of the Guarantor's
Subsidiaries to the same extent as the Debentures as described in the Indenture.
If an Event of Default has occurred and is continuing under the Declaration, the
rights of the holders of the Common Securities to receive any payments shall be
subordinated to the rights of the Holders of Preferred Securities to receive
Guarantee Payments hereunder.

                                  ARTICLE VII
                                  TERMINATION

     SECTION VII.1   Termination.  This Preferred Securities Guarantee shall
                     -----------                                            
terminate upon (i) full payment of the Redemption Price of all Preferred
Securities, (ii) upon the distribution of the Debentures to the Holders of all
of the Preferred Securities or (iii) upon full payment of the amounts payable in
accordance with the Declaration upon liquidation of the Issuer.  Notwithstanding
the foregoing, this Preferred Securities Guarantee will continue to be effective
or will be reinstated, as the case may be, if at any time any Holder of
Preferred Securities must restore payment of any sums paid under the Preferred
Securities or under this Preferred Securities Guarantee.

                                 ARTICLE VIII
                                INDEMNIFICATION

     SECTION VIII.1   Exculpation.
                      ----------- 

                                       11

 
     (a) No Indemnified Person shall be liable, responsible or accountable in
damages or otherwise to the Guarantor or any Covered Person for any loss, damage
or claim incurred by reason of any act or omission performed or omitted by such
Indemnified Person in good faith in accordance with this Preferred Securities
Guarantee and in a manner that such Indemnified Person reasonably believed to be
within the scope of the authority conferred on such Indemnified Person by this
Preferred Securities Guarantee or by law, except that an Indemnified Person
shall be liable for any such loss, damage or claim incurred by reason of such
Indemnified Person's negligence or willful misconduct with respect to such acts
or omissions.

     (b) An Indemnified Person shall be fully protected in relying in good faith
upon the records of the Guarantor and upon such information, opinions, reports
or statements presented to the Guarantor by any Person as to matters the
Indemnified Person reasonably believes are within such other Person's
professional or expert competence and who has been selected with reasonable care
by or on behalf of the Guarantor, including information, opinions, reports or
statements as to the value and amount of the assets, liabilities, profits,
losses, or any other facts pertinent to the existence and amount of assets from
which Distributions to Holders of Preferred Securities might properly be paid.

     SECTION VIII.2   Indemnification.  The Guarantor agrees to indemnify each
                      ---------------                                         
Indemnified Person for, and to hold each Indemnified Person harmless against,
any loss, liability or expense incurred without negligence or bad faith on its
part, arising out of or in connection with the acceptance or administration of
the trust or trusts hereunder, including the costs and expenses (including
reasonable legal fees and expenses) of defending itself against, or
investigating, any claim or liability in connection with the exercise or
performance of any of its powers or duties hereunder.  The obligation to
indemnify as set forth in this Section 8.2 shall survive the termination of this
Preferred Securities Guarantee.


                                  ARTICLE IX
                            [INTENTIONALLY OMITTED]
 
                                   ARTICLE X
                                 MISCELLANEOUS

     SECTION X.1   Successors and Assigns.  All guarantees and agreements
                   ----------------------                                
contained in this Preferred Securities Guarantee shall bind the successors,
assigns, receivers, trustees and representatives of the Guarantor and shall
inure to the benefit of the Holders of the Preferred Securities then
outstanding.

     SECTION X.2   Amendments.  Except with respect to any changes that do not
                   ----------                                                 
adversely affect the rights of the Holders (in which case no consent of the
Holders will be required), this Preferred Securities Guarantee may only be
amended with the prior approval of the Holders of at least a Majority in
Liquidation Amount of the Preferred Securities.  The provisions of Section 12.2
of the Declaration with respect to meetings of, and action by written consent
of, the Holders of the Securities apply to the giving of such approval.

     SECTION X.3   Notices.  All notices provided for in this Preferred
                   -------                                             
Securities Guarantee shall be in writing, duly signed by the party giving such
notice, and shall be delivered, telecopied or mailed by registered or certified
mail, as follows:

     (a) If given to the Preferred Guarantee Trustee, at the Preferred Guarantee
Trustee's mailing address set forth below (or such other address as the
Preferred Guarantee Trustee may give notice of to the Guarantor and the Holders
of the Preferred Securities):  Harris Trust and Savings Bank, 311 West Monroe
Street, 12th Floor, Chicago, IL 60606 Attention: Corporate Trust Administration.

     (b) If given to the Guarantor, at the Guarantor's mailing address set forth
below (or such other address as the Guarantor may give notice of to the
Preferred Guarantee Trustee and the Holders of the Preferred Securities):
Motorola, Inc., 1303 East Algonquin Road, Schaumburg, IL 60196  Attention:
General Counsel.

     (c) If given to any Holder of Preferred Securities, at the address set
forth on the books and records of the Issuer.

                                       12

 
All such notices shall be deemed to have been given when received in person,
telecopied with receipt confirmed, or mailed by first class mail, postage
prepaid, except that if a notice or other document is refused delivery or cannot
be delivered because of a changed address of which no notice was given, such
notice or other document shall be deemed to have been delivered on the date of
such refusal or inability to deliver.

     SECTION X.4   Benefit.  This Preferred Securities Guarantee is solely for
                   -------                                                    
the benefit of the Holders of the Preferred Securities and, subject to Section
3.1(a), is not transferable separately from the Preferred Securities.

     SECTION X.5   Governing Law.  THIS PREFERRED SECURITIES GUARANTEE SHALL BE
                   -------------                                               
GOVERNED BY, AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE
STATE OF NEW YORK.

                                       13

 
     IN WITNESS WHEREOF, this Preferred Securities Guarantee is executed as of
the day and year first above written.


                              MOTOROLA, INC., as Guarantor

                              By: /s/ Garth L. Milne
                                 ------------------------------------------
                              Name: Garth L. Milne
                              Title: Senior Vice President and Treasurer


                              HARRIS TRUST AND SAVINGS BANK, as
                              Preferred Guarantee Trustee

                              By: /s/ C. Potter
                                 ------------------------------------------
                              Name: C. Potter
                              Title: Assistant Vice President

                                       14