BMW

Here are some links that I found helpful when doing the M50 24 valve swap into my E30. Great site for looking up BMW part numbers, has parts diagrams as well. Real OEM California BAR Smog Check Guide (Specifically Appendix D) Garagistic Swap and Wiring Information RMeuropean BMW E30 M50 Swap Great Wiring Harness Post Post about the pins

This is the list of parts that were required to swap a M50 (Non Vanos) into an early model (1986 325e) E30. This list of parts is not meant to be an exhaustive list. These were the main sticking points as I remember them. Depending on your engine swap year some of this may not be correct, make sure you…

I spent a lot of time pouring over the E30/E36/34 wiring diagrams and reading about others experienced with the swap process to come up with this. This wiring chart works for a 1986 325e and the donor motor and harness was a M50NV out of a 92 325i. I paid special attention to keep everything looking as factory as possible.