BMW E34/E32 ECU Up for sale is a Working, in excellent condition BMW ECU. Bosch Part number-- 0 260 002 262 (0260002262) BMW Part number (1421512) 1 421 512 . This unit is from a 94 740i, this ECU should also work with other years and some 540i's as well as 840i models. But as always, check your ECU's part number to be sure this is the right one for you. These TCU's can cause a variety of transmission issues that may mimic the symptoms of a bad transmission, it's a good idea to keep one as a spare just in case yours starts acting up. 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.