[s-cars] 3B ECU part number, anyone?

[jimk at spotgraphicsinc.com]

Actually, yes, I do agree, it denotes color of interior trim in other cases.
In the case of an ECU though I would guess it is some slight code thing.  I
priced S4/S6 ECU's from a few dealer a while back and they all came back with
the same part number but slightly different ending letters.
Jim

Ian Duff wrote:

> I agree on everything except the last letter bit.
>
> As an example, wheels listed in the FA are as follows:
> pn                width   dia   ET     Ian's description
> 4A0 601 025 B     7       15    45     8 spokes
> 4A0 601 025 D     7.5     15    40     6 tapered spokes, not AVUS
> 4A0 601 025 E     8       16    40     5 spokes
> 4A0 601 025 M     8       17    40     10 spokes
>
> Looks like Hans und Franz have some fun at our expense by changing just the
> last letters.
>
> -Ian Duff.
> -----Original Message-----
> From: jimk at spotgraphicsinc.com [mailto:jimk at spotgraphicsinc.com]
> Sent: Wednesday, 15 January 2003 12:16
> To: Ian Duff
> Cc: s-car-list at audifans.com
> Subject: Re: [s-cars] 3B ECU part number, anyone?
>
> Thanks.  I would venture a guess that the reason for the two different
> numbers
> is because the first 3 digits denote the model family but I could be wrong.
> If
> I remember at all correctly, the first group is model (as in 100, S4, A4
> etc),
> the second group is component group (electronics, lights, interior etc.).
> Then
> the lst group denoted the specific item (as in left headlight, ECU, front
> seat).  I coul dbe wrong but that would explain why the first three digits
> ar
> different and the other 6 are the same.  The letter (or letters) at the end
> denote the version - generally minor updates to the code etc.
> VW codes work the same way.
> I would guess that a good partsperson (if that exists) could eventually look
> at
> a part number and tell you exactly what the part is just by interpreting the
> code.
> If anyone can confirm or clarify further, that would be great.
> Thanks,
> Jim
>
> Ian Duff wrote:
>
> > I looked at the 1991 200 quattro (Type 44) in the US Family Album and it
> > indicated the pn for a "motronic control unit" is 447 907 404 AA. Then I
> > looked at a 1991 S2 (Type 89) in the Euro Family Album, and it showed a
> > "electronic control unit", "MOTRONIC" as pn 895 907 404 BA. CRAFT is
> rearing
> > its ugly head, did a 3B show up in any other cars?
> > -Ian Duff.
> > -----Original Message-----
> > From: s-car-list-admin at audifans.com
> > [mailto:s-car-list-admin at audifans.com]On Behalf Of
> > jimk at spotgraphicsinc.com
> > Sent: Tuesday, 14 January 2003 16:46
> > To: s-car-list at audifans.com
> > Subject: [s-cars] 3B ECU part number, anyone?
> >
> > Subject says it all.  Any help would be appreciated.
> > Thanks,
> > Jim Klein
> >
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