Wiring harness compatibility

[markus97]

Hi,
I´ve bought a euro M3 coupe 1994/07 with a wiring harness disaster. It all started with an optimistic guy trying to weld a roll cage in it and move the fuse box so the cage could attach to strut towers.
After this a lot went wrong, some things are out of order, for example gauges and some other things. I could of course try to solve this problems but the harness is no good since many cables are joint and lengthened and that doesn´t make me sleep very well at night.
I need a donor car to get a new harness and my question is what kind of models to search for. What cars except for M3, if any, uses the same harness? Or almost the same?

I know from way back when I swapped a S50B30 in a 325 that everything worked allright except for oil temperature in the cluster. That means to me that if i go with a 325 harness in my M3 body I will at least get the engine running. But what about the rest in the car?
Does a 320 share harness with a 325? A 320 donor car is a lot easier to find.

I have a 328 coupe 1997 body in the yard, someone can tell the compability of that harness?
A lot of questions but I hope someone with knowledge can give me some pointers. If your answer is a guess please say so since I´m already quite a bit off the course here.

Regards from Sweden,
/Markus

[bluptgm3]

Use the last seven characters of the VIN in www.realoem.com to establish similarities/differences.

If you are just browsing realoem, E36 is in the ‘Classic’ catalog.


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[markus97]

Yes from that site you can tell that there are many different part numbers on the looms but no info about the differences/similarities.

[markus97]

Double