Quote Originally Posted by shogun View Post
Seems to be more difficult, different engine installed http://www.bimmerforums.com/forum/sh...ontrol-install

says Marko from Serbia = European model, not US spec.
That complicates things a bit! But it may come down to just wiring:

1992 M30 uses ECU 1387625 and Actuator 1378315. From the pics in the other thread, this is what OP has got
1989 M20 uses ECU 1388043 and Actuator 1388315.

Realoem shows the changeover point from 1388043 to 1387625 as September '91 and says it is not backwards compatible. Mine was built in Feb '92 and realoem shows it had the later one. It didn't. It had the earlier 1388043 and worked perfectly. That is probably what they had on the shelf at the time where it was built, together with the 'old' loom. Sot it would appear you can use either provided you wire it up correctly