Audi ECU  8A0 906 266 A   / 266A  MMS-200    

Up for sale is a Working, in excellent condition Audi 90CS v6 ECU. VW/Audi part number 8A0 906 266B, Hitachi part # MMS-300. This ECU came out of a 93 Audi 90, may fit other models/years, but 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 Hitachi 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.