Audi ECU Up for sale is a Working, in excellent condition 1994 Audi V8 4.2 liter ECU. VW/Audi part number 441 907 557 DA / 441907557DA / 0 261 203 011 / 0 261 203 011 - Unit was recently removed from a just crash damaged vehicle. This unit comes with a 30 day functionality warranty. new part list price from AUDI USA is $ 4,189.92 ***!!!RARE ECU ALERT!!!*** This ECU should fit many 4.2 liter Audi V8 Quattros possibly others than just 94 model year however as always your best bet is to match the part numbers with the part number on your original. Even if you don't have a bad ECU, this is great to keep as a back up or for diagnostic purposes. These are located under the driver side knee bolster.A faulty ECU is a common no start or random stalling problem with these cars. These can also cause issues with erroneous check engine lights, idle control problems as well as emission control & cold or hot start problems. Low power & lean running are also fair game. I have also seen fuel pump relay turn on faults (ECU won't turn on the fuel pump), as well as an condition where the high speed injector driver has failed. This causes the car to sit and idle fine, but it won't accelerate. Comes with a 30 day functionality guarantee- Please see the details related to this on the return policy details section of this listing.