EXHIBIT 99-a


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



     As required by 18 U.S.C. Section 1350, I, Larry D. Yost, Chairman of the
Board and Chief Executive Officer of ArvinMeritor, Inc., hereby certify that:
              1.  The Quarterly Report of ArvinMeritor, Inc. on Form 10-Q for
                  the Quarterly Period Ended December 29, 2002 fully complies
                  with the requirements of Section 13(a) of the Securities
                  Exchange Act of 1934, and

              2.  The information contained in that report fairly presents, in
                  all material respects, the financial condition and results of
                  operations of ArvinMeritor, Inc.





/s/ Larry D. Yost
- -----------------
Larry D. Yost

Date:  February 11, 2003




This certification accompanies the Quarterly Report of ArvinMeritor, Inc. on
Form 10-Q for the Quarterly Period ended December 29, 2002, pursuant to Section
906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent
required by the Sarbanes-Oxley Act of 2002, be deemed filed by ArvinMeritor,
Inc. for purposes of Section 18 of the Securities Exchange Act of 1934, as
amended.