Up for sale is a Working, in excellent condition Programa Remanufactured E24 633csi ECU. Bosch Part number-- 0 261 200 008 (0261200008) . This ECU should work with some of the following models: E28 533i 535iE24 633csi 635csiE23 733i 735i Please check the part number off your original before buying, as there are several different types of these. Check my other store items, I probably have what you need if this is not the one. This is one of the most common no start or random stalling problems with these Motronic ECU controlled cars. If yours does not have this problem, keep an extra ECU in the trunk, you might some day be glad you did... This unit from a BOSCH Authorized service center is $1792.80, if you can find one that has vintage BOSCH components in stock. Get a good used one here from me, with a 30 day functionality guarantee for 1/8 that price! This is a  remanufactured unit! This unit is only about 4 years old, and should have many many years of service life left.