NefMoto > Technical > Flashing and Chipping > C5 A6 ECU into B5 S4
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Author Topic: C5 A6 ECU into B5 S4  (Read 4521 times)
wildwildwest118
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« on: April 03, 2013, 07:55:11 AM »
I have a 2001 S4 6 speed with an APR chipped H box that I'm wanting to replace. My friend has a 2000 A6 6 speed with a stock K box. What would need to be done to make my ECU work in his car and his in mine? If it can be done.
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ddillenger
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« Reply #1 on: April 03, 2013, 09:16:50 AM »
Just install the ecu. As the a6 doesn't have an immobilizer, the keyways match and it'll plug right in. If it were a 2001 you'd have to modify the ecu plug. Softcoding on APR chipped ecu's is locked, so if the ecu is for a tip and the a6 is manual (or vice versa) it likely won't work right.

The a6 has a Bosch Maf, the S4 has hitachi. You'll have make sure to install the correct maf for the ecu.
« Last Edit: April 03, 2013, 11:13:34 AM by ddillenger » Logged
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wildwildwest118
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« Reply #2 on: April 03, 2013, 11:10:44 AM »
So since both of ours are 6 speed, I should be able to just swap the ECUs plug and play?
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ddillenger
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« Reply #3 on: April 03, 2013, 11:13:56 AM »
Yes and no. You have to swap the MAF sensors as well.
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wildwildwest118
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« Reply #4 on: April 03, 2013, 11:18:13 AM »
Ok that was going to be my next question. Thanks for the quick replies and explanations!
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