I know for a fact that the M42 uses individual coils; my guess is that they are just housed in a cluster, but there are almost definately 4 coils.
I already have a question:D I read at http://www.wikipedia.org/wiki/BMW_M42 that profile gaskets on M42s fail prematurely built before '93.where are they located?
Pre 89' doors use different glass, and internals.While it will fit, it will not fit perfect.Also, if it is red, BrilliantRot is not the same as the other reds. It is VERY close, but from the right angles it is different.