BMW E24/E23 633 630 733 Engine Control Unit ECU Up for sale is a Working, in excellent condition BMW E24 / E23 Inline 6 ECU. Bosch Part number-- 0 280 001 111 (0280001111). This unit is from a 78 633csi, this ECU should also work with some (if not all) 78-79 e23 733i's & 79 633csi's and perhaps even some e28 533i's, check your ECU's part number to be sure this is the right one for you. This is one of the most common no start or random stalling problems with these Jetronic 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. This unit was from a relatively minor crash damaged car that was still totaled, that we were able to runtest, and comes comes with a 30 day functionality guarantee! Vintage BOSCH components are getting to be harder and harder to come by. Even if you don't need one now, if your car have this unit, snap it up and keep it in your trunk for a rainy car. Dealers may be able to get this unit for you on short notice, but it will likely be in excess of $1000.