SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
                                   FORM 10-Q/A
                                 (AMENDMENT #1)

(X)  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
     ACT OF 1934

                  For the quarterly period ended March 31, 2003

                                       OR

( )  TRANSITION  REPORT  PURSUANT  TO SECTION  13 OR 15(d) OF THE  SECURITIES
     EXCHANGE ACT OF 1934

   For the transition period from ___________________ to ____________________


                         Commission file number 0-21318


                            O'REILLY AUTOMOTIVE, INC.
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

      Missouri                                       44-0618012
- --------------------------------------------------------------------------------
(State or other jurisdiction               (I.R.S. Employer Identification No.)
    of incorporation or
       organization)

                               233 South Patterson
                           Springfield, Missouri 65802
- --------------------------------------------------------------------------------
               (Address of principal executive offices, Zip code)

                                 (417) 862-6708
- --------------------------------------------------------------------------------
              (Registrant's telephone number, including area code)

                                 Not applicable
- --------------------------------------------------------------------------------
              (Former name, former address and former fiscal year,
                         if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:  None

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

         Yes [X]           No [ ]

Indicate by a check mark  whether the  registrant  is an  accelerated  filer (as
defined in Rule 12b-2 of the Act). Yes [X] No [ ]


Common stock,  $0.01 par value - 53,494,797  shares  outstanding as of March 31,
2003. As of that date,  the  aggregate  market value of the voting stock held by
non-affiliates of the Company was approximately $1,448,104,155 based on the last
sale price of the common stock  reported by the Nasdaq  Stock  Market  (National
Market).

This report contains a total of 10 pages of which this page is number 1.


<page>
EXPLANATORY NOTE

The  registrant  is filing  this Form 10-Q/A  solely to correct the  inadvertent
omission of "Item 5 - Submission of Matters to a Vote of Security  Holders" from
the Form 10-Q for the quarter ended March 31, 2003,  filed by the  registrant on
May 9, 2003,  (the "Form  10-Q").  No other  changes  have been made to the Form
10-Q.


                                     Page 2
<page>
                   O'REILLY AUTOMOTIVE, INC. AND SUBSIDIARIES
                                   FORM 10-Q/A
                          Quarter Ended March 31, 2003


                                TABLE OF CONTENTS


                                                                         Page
PART II - OTHER INFORMATION                                              ----

  ITEM 5 - SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS              4

SIGNATURE PAGE                                                              5

CERTIFICATIONS                                                              6

EXHIBIT INDEX                                                               8

                                     Page 3
<page>
PART II - OTHER INFORMATION

ITEM 5. SUMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

(a)  Our Annual  Meeting  of the  Shareholders  was held on May 6, 2003.  Of the
     53,416,226 shares entitled to vote at such meeting,  49,074,235 shares were
     present at the meeting in person or by proxy.

(b)  The  individual  listed below were elected as a Class I Director,  and with
     respect to each such Director,  the number of shares voted for and withheld
     were as follows:

<table>
<caption>
                                               Number of Shares Voted
                                              ------------------------
       Name of Nominee                           For         Withheld
       -----------------------                ----------     ---------
                                                       
       Charles H. O'Reilly Jr.                39,615,685     9,457,550
</table>

The individuals  listed below are Directors whose term of office continued after
the meeting:

David E. O'Reilly
Rosalie O'Reilly-Wooten
Lawrence P. O'Reilly
Joe C. Greene
Jay Burchfield
Paul Lederer

(c)  The 2003  Employee  Stock  Option Plan was  approved,  the number of shares
     voted for, against and abstained were as follows:

                           Number of Shares Voted
                  ----------------------------------------
                     For           Against        Abstain
                  ----------     ----------     ----------
                  22,918,103     19,212,694       49,725



(d)  The 2003  Director  Stock  Option Plan was  approved,  the number of shares
     voted for, against and abstained were as follows:

                           Number of Shares Voted
                  ----------------------------------------
                      For          Against        Abstain
                  ----------     ----------     ----------
                  39,506,563      2,613,793       60,166

(e)  Ernst & Young LLP was ratified as  independent  auditor for the fiscal year
     ending  December  31,  2003,  the number of shares  voted for,  against and
     abstained were as follows:

                           Number of Shares Voted
                  ----------------------------------------
                     For           Against       Abstain
                  ----------     ----------     ----------
                  34,901,792     14,141,148       31,295


                                     Page 4
<page>


                                   SIGNATURES

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.


                         O'REILLY AUTOMOTIVE, INC.

June 4, 2004             /s/  David E. O'Reilly
- ------------             -------------------------------------------------------
Date                     David E. O'Reilly, Co-Chairman of the Board and Chief
                           Executive Officer (Principal Executive Officer)


June 4, 2004             /s/  James R. Batten
- ------------             -------------------------------------------------------
Date                     James R. Batten, Vice-President of Finance and
                          Chief Financial Officer (Principal Financial and
                          Accounting Officer)


                                     Page 5
<page>
                                 CERTIFICATIONS

I, David E. O'Reilly,  Co-Chairman of the Board,  President and Chief  Executive
Officer of O'Reilly Automotive, Inc. (O'Reilly), certify that:

1.   I have reviewed this quarterly report on Form 10-Q of O'Reilly;

2.   Based on my knowledge,  this  quarterly  report does not contain any untrue
     statement of a material fact or omit to state a material fact  necessary to
     make the statements  made, in light of the  circumstances  under which such
     statements  were made, not misleading with respect to the period covered by
     this quarterly report;

3.   Based on my  knowledge,  the  financial  statements,  and  other  financial
     information  included  in this  quarterly  report,  fairly  present  in all
     material respects the financial  condition,  results of operations and cash
     flows of O'Reilly as of, and for, the periods  presented in this  quarterly
     report;

4.   O'Reilly's other certifying  officer and I are responsible for establishing
     and maintaining  disclosure controls and procedures (as defined in Exchange
     Act Rules 13a-14 and 15d-14) for O'Reilly and we have:

     a)   designed  such  disclosure  controls  and  procedures  to ensure  that
          material information relating to O'Reilly,  including its consolidated
          subsidiaries,  is made known to us by others  within  those  entities,
          particularly during the period in which this quarterly report is being
          prepared;

     b)   evaluated  the  effectiveness  of O'Reilly's  disclosure  controls and
          procedures  as of a date  within 90 days prior to the  filing  date of
          this quarterly report (the "Evaluation Date"); and

     c)   presented  in  this  quarterly   report  our  conclusions   about  the
          effectiveness  of the disclosure  controls and procedures based on our
          evaluation as of the Evaluation Date;

5.   O'Reilly's other certifying officer and I have disclosed, based on our most
     recent  evaluation,  to  O'Reilly's  auditors  and the audit  committee  of
     O'Reilly's  board  of  directors  (or  persons  performing  the  equivalent
     function):

     a)   all  significant  deficiencies  in the design or operation of internal
          controls which could adversely  affect  O'Reilly's  ability to record,
          process,  summarize and report  financial data and have identified for
          O'Reilly's auditors any material weaknesses in internal controls; and

     b)   any fraud, whether or not material,  that involves management or other
          employees who have a significant role in O'Reilly's internal controls;
          and

6.   O'Reilly's other certifying  officer and I have indicated in this quarterly
     report whether or not there were significant  changes in internal  controls
     or in other  factors  that could  significantly  affect  internal  controls
     subsequent  to the  date  of our  most  recent  evaluation,  including  any
     corrective  actions with regard to  significant  deficiencies  and material
     weaknesses.


Date:  June 4, 2004        /s/ David E. O'Reilly
                           -----------------------------------------------------
                           David E. O'Reilly, Co-Chairman of the Board and Chief
                            Executive Officer (Principal Executive Officer)


                                     Page 6
<page>
                                 CERTIFICATIONS

I, James R. Batten,  Vice  President of Finance and Chief  Financial  Officer of
O'Reilly Automotive, Inc. (O'Reilly), certify that:

1.   I have reviewed this quarterly report on Form 10-Q of O'Reilly;

2.   Based on my knowledge,  this  quarterly  report does not contain any untrue
     statement of a material fact or omit to state a material fact  necessary to
     make the statements  made, in light of the  circumstances  under which such
     statements  were made, not misleading with respect to the period covered by
     this quarterly report;

3.   Based on my  knowledge,  the  financial  statements,  and  other  financial
     information  included  in this  quarterly  report,  fairly  present  in all
     material respects the financial  condition,  results of operations and cash
     flows of O'Reilly as of, and for, the periods  presented in this  quarterly
     report;

4.   O'Reilly's other certifying  officer and I are responsible for establishing
     and maintaining  disclosure controls and procedures (as defined in Exchange
     Act Rules 13a-14 and 15d-14) for O'Reilly and we have:

     a)   designed  such  disclosure  controls  and  procedures  to ensure  that
          material information relating to O'Reilly,  including its consolidated
          subsidiaries,  is made known to us by others  within  those  entities,
          particularly during the period in which this quarterly report is being
          prepared;

     b)   evaluated  the  effectiveness  of O'Reilly's  disclosure  controls and
          procedures  as of a date  within 90 days prior to the  filing  date of
          this quarterly report (the "Evaluation Date"); and

     c)   presented  in  this  quarterly   report  our  conclusions   about  the
          effectiveness  of the disclosure  controls and procedures based on our
          evaluation as of the Evaluation Date;

5.   O'Reilly's other certifying officer and I have disclosed, based on our most
     recent  evaluation,  to  O'Reilly's  auditors  and the audit  committee  of
     O'Reilly's  board  of  directors  (or  persons  performing  the  equivalent
     function):

     a)   all  significant  deficiencies  in the design or operation of internal
          controls which could adversely  affect  O'Reilly's  ability to record,
          process,  summarize and report  financial data and have identified for
          O'Reilly's auditors any material weaknesses in internal controls; and

     b)   any fraud, whether or not material,  that involves management or other
          employees who have a significant role in O'Reilly's internal controls;
          and

6.   O'Reilly's other certifying  officer and I have indicated in this quarterly
     report whether or not there were significant  changes in internal  controls
     or in other  factors  that could  significantly  affect  internal  controls
     subsequent  to the  date  of our  most  recent  evaluation,  including  any
     corrective  actions with regard to  significant  deficiencies  and material
     weaknesses.


Date:  June 4, 2004        /s/ James R. Batten
                           -----------------------------------------------------
                           James R. Batten, Vice President of Finance
                            and Chief Financial Officer (Principal Financial and
                            Accounting Officer)


                                     Page 7
<page>
                                  EXHIBIT INDEX
<table>
<caption>
Number  Description                                                                     Page
- ------  -----------                                                                     ----
<s>     <c>                                                                              <c>
99.1    Certificate of the Chief Executive  Officer  pursuant to 18 U.S.C.  Section
        1350,  as 9 adopted  pursuant to Section 906 of the  Sarbanes-Oxley  Act of
         2002, filed herewith.                                                             9

99.2    Certificate of the Chief Financial  Officer  pursuant to 18 U.S.C.  Section
        1350, as 10 adopted  pursuant to Section 906 of the  Sarbanes-Oxley  Act of
        2002, filed herewith.                                                             10
</table>
                                     Page 8
<page>
                   O'REILLY AUTOMOTIVE, INC. AND SUBSIDIARIES
                        Exhibit 99.1 - CEO Certification



                            O'REILLY AUTOMOTIVE, INC.

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In  connection  with the  Quarterly  Report of O'Reilly  Automotive,  Inc.  (the
"Company")  on Form 10-Q for the period ending March 31, 2003, as filed with the
Securities and Exchange  Commission on the date hereof (the "Report"),  I, David
E. O'Reilly,  Chief Executive  Officer of the Company,  certify,  pursuant to 18
U.S.C.  Section 1350, as adopted  pursuant to Section 906 of the  Sarbanes-Oxley
Act of 2002, that:

(1)  The Report fully complies with the  requirements  of section 13(a) or 15(d)
     of the Securities Exchange Act of 1934; and

(2)  The information  contained in the Report fairly  presents,  in all material
     respects, the financial condition and results of operations of the Company.




/s/ David E. O'Reilly
- ----------------------------------------------
David E. O'Reilly
Chief Executive Officer

June 4, 2004


This  certification  is made solely for purposes of 18 U.S.C.  Section 1350, and
not for any other purpose.

                                     Page 9
<page>


                   O'REILLY AUTOMOTIVE, INC. AND SUBSIDIARIES
                        Exhibit 99.2 - CFO Certification



                            O'REILLY AUTOMOTIVE, INC.

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In  connection  with the  Quarterly  Report of O'Reilly  Automotive,  Inc.  (the
"Company")  on Form 10-Q for the period ending March 31, 2003, as filed with the
Securities and Exchange  Commission on the date hereof (the "Report"),  I, James
R.  Batten,  Chief  Financial  Officer of the Company,  certify,  pursuant to 18
U.S.C.  Section 1350, as adopted  pursuant to Section 906 of the  Sarbanes-Oxley
Act of 2002, that:

(1)  The Report fully complies with the  requirements  of section 13(a) or 15(d)
     of the Securities Exchange Act of 1934; and

(2)  The information  contained in the Report fairly  presents,  in all material
     respects, the financial condition and results of operations of the Company.




/s/ James R. Batten
- ----------------------------------------------
James R. Batten
Chief Financial Officer

June 4, 2004



This  certification  is made solely for purposes of 18 U.S.C.  Section 1350, and
not for any other purpose.

                                    Page 10