POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints each of
Robert M. Loesch, Avery S. Cohen, Suzanne K. Hanselman and Kevin P. Bagby signing singly,
the undersigned's true and lawful attorney-in-fact to:

                1.        execute for and on behalf of the undersigned, in the undersigned's
        capacity as an officer and/or director of Stoneridge, Inc. (the "Company"), Forms
        3, 4, and 5 in accordance with Section 16(a) of the Securities Exchange Act of
        1934 and the rules thereunder; and
                2.        do and perform any and all acts for and on behalf of the
        undersigned which may be necessary or desirable to complete and execute any
        such Form 3, 4, or 5, complete and execute any amendment or amendments
        thereto, and timely file such form with the United States Securities and Exchange
        Commission and any stock exchange or similar authority.

The undersigned hereby grants to each such attorney-in-fact full power and authority to
do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done
in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes
as the undersigned might or could do if personally present, with full power of substitution or
revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-
fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of
attorney and the rights and powers herein granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not
assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934.

This Power of Attorney shall remain in full force and effect until the undersigned is no
longer required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of and
transactions in securities issued by the Company, unless earlier revoked by the undersigned in a
signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of the date set forth below.

                                                        /s/Michael J. Bagby
                                                        _______________________________________
                                                        Michael J. Bagby
                                                        Date: August 22, 2003

BAGBY MICHAEL J 4