BMW E30 / E34 Convertible ECU Up for sale is a Working, in excellent condition BMW E30 ECU. Bosch Part number-- 0 261 200 380 (0261200380), BMW part number 1730576 . This unit should fit some 1987-1991 325ix 325i 525i models, E30 & E34 . and is in good working order. This may also work with other models/years but as usual check your part number to be sure it will work. This is one of the most common no start or random stalling problems with these Motronic 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.