Used Audi A4 2000-2004 1.8T ECU. I bought this used years ago on ebay to fix a check engine light issue in my 2000 Audi A4 that had the 1.8T engine. You can see the part number in the pics. I found the problem to be something else, so I never installed the ECU. I believe the unit will work - but I can't be sure.