Audi ECU Up for sale is a Working, in excellent condition Audi 5000s ECU. VW/Audi part number 811 906 264 C (811906264C) , Bosch part # 0 280 800 128 (0280800128) . This ECU came out of a 86 Audi 5000S, it should fit other models/years. However as always your best bet is to match the part numbers with the part you need. This is one of the most common no start or random stalling problems with these Bosch ECU's. If yours does not have this problem, keep an extra ECU in the trunk, you might some day be glad you did... These units now have to be special ordered from most dealers new for big $$ (often times over $1000!), and finding a good one second hand is getting to be a very hard chore.