<DOCUMENT>
<TYPE>EX-23.(A)
<SEQUENCE>3
<FILENAME>k24196exv23wxay.txt
<DESCRIPTION>CONSENT OF INDPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
<TEXT>
<PAGE>

                                                                   Exhibit 23(a)

            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statements
(Form S-8 Nos. 333-101642, 33-65321, 333-04661, 333-105858 and 333-118213)
pertaining to various stock option and incentive plans of Gentex Corporation of
our reports dated February 8, 2008, with respect to the consolidated financial
statements of Gentex Corporation and subsidiaries, and the effectiveness of
internal control over financial reporting of Gentex Corporation, included in
this Annual Report (Form 10-K) for the year ended December 31, 2007.


                                        /s/ Ernst & Young LLP

Grand Rapids, Michigan
February 22, 2008


                                      -51-

</TEXT>
</DOCUMENT>
