Porsche ECU Up for sale is a Working, in excellent condition Porsche 924 Lambda Control ECU. Bosch Part number-- 0 280 800 037, Porsche Part # 931.617.101.01. This unit should fit 80-81 924's, possibly other models of the same vintage as well, but it is the buyers responsibility to find this out. I believe this unit also came in some Mercedes' of the same vintage, if your ECU has the same Bosch number, this will work fine. These are always a chore to find "when you need one" These units now have to be special ordered from most dealers new for big $$ (often times over $1000!).