[s-cars] ECU question

[Igor Kessel]

jimk at spotgraphicsinc.com wrote:
>
> Is a stock ECU from a 1993 S4 interchangable with a stock one from a
> 1995 S6?  How about modified?  I thought they were and can't see why
> not, but haven't tried it yet.
> The reason I ask is that there are 2 different part numbers and the
> dealer is quoting different prices with the S6 one being cheaper.  I am
> very confused.
> 93 S4 ECU 8A0 906 266 B
> 95 S6 ECU 4A0 997-551-X
> Jim

And my '97 is a 4A0-907-551AA.
All of them are interchangeable, chipped or unchipped. Namely, my '97
ECU ran in Larry's '93 and in Stefan's '95. And vice versa.

--
Igor Kessel
two turbo quattros