I've been doing some research on swapping a M54B30 into my 325e sedan. I recently got a donor car with a good engine from a 05 X3(E83). I have the engine harness wiring(MS45.1) with EWS, antenna, and associated wiring. I have a suspicion that the e46 has somewhat the same pinouts, but I could be way off. My question is would you be able to create a custom wire harness for me? I'm unsure if I want to keep the EWS intact or swap if out for a MS43 DME. If I can keep the OBD2, SAP, etc., that would be great. I was having some wishful thinking with theft prevention, by adding the E83 key ignition somewhere hidden to prevent someone from stealing my car. Back to my question, let me know what information you need from me.
Andrew325is
E30 Fanatic
Last Activity: 01-09-2026, 11:32 AM
Joined: 01-10-2008
Location: Portland, Ore.
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I've resumed making harnesses. I can make one for the M54 if you'd like. I usually do them for MS43, but I could do MS45 if you need that. It's $550. -
Hello, I'm sorry I didn't see your message. I will resume making adapter harnesses in May, but I haven't decided if I'm making them for M54. I don't get a lot of M54 orders. Maybe I will make a few, but I will focus on S54 and S62.
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