2006 Audi a6 3.2l ecu location
The ECU is inside a black plastic box, which is screwed onto the frame of the car inside the area where the battery and brake fluid resevoir are located. This area has a plastic cover over top of it which must first be removed. Once you have located the ECU weatherproof housing, remove the 3 or 4 screws that hold the cover on - very easy to do. Once removed, you can identify the ECU easily inside the box. If it not there on your model, check in at Audizine.com - there's a lot of people there that have reflashed their ECU's
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