David Ian Utley writes:
> The reason for my question is that the brain for my '85
> GTi engine went out, and I discovered this brain from an '85 4000 S.  The
> Bosch part numbers are identical, as are the VW/AUDI part numbers, but the
> three digits in the oval underneath the Bosch ensignia differ. 

The 85 Audi 4000 FI control brain should work fine on the 85 GTI.
They are the same.

-Ti
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