S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

How do I check which box type my ECU is?...

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Old Oct 22, 2001 | 06:19 PM
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Default How do I check which box type my ECU is?...

I know someone brought this up recently, but I couldn't find the thread.

Thanks

2001 S4 Sedan 6Sp(01/01 build)
Black/Silver Nappa
Bose/Prem/Cold
35% Tint
V1
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Old Oct 22, 2001 | 06:27 PM
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Default Open up the ECU housing and look at the ECU itself

The letter at the end will signify which ECU you have.

Check link to tech section FAQ<ul><li><a href="https://www.audiworld.com/tech/eng4.shtml">https://www.audiworld.com/tech/eng4.shtml</a</li></ul>
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Old Oct 22, 2001 | 06:37 PM
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Or call dealer with your vin #
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Old Oct 22, 2001 | 11:12 PM
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reza's Avatar
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Rule of thumb : New badge = M, old badge = H
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