Up for sale is a Working, in excellent condition Saab 900 non turbo 16 valve ECU. - This is OEM to 1990 900 / 900-S non turbo models. Will work with all US model 88-90 16 valve 900 / 900-S models 16 valve models. This is a pretty rare ECU, ECU. Part number-- 0280000580 (0 280 000 580) / Saab part number 9119447 . This is an improvement over many of the 88-89 900 16V ECU's, especially those 89's with original 0280000564 ECU. A Faulty ECU is the cause of one of the most common no start or random stalling problems with the cars. 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 $$, and finding a good one second hand is getting to be a chore. Thanks for looking and good luck!