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Where is it?
I have been trying to find it in my car and I can't. I think the engine was changed and the ground wire never installed.
Also, could someone provide several pictures of the stock 325 engine bay?
Thanks.
 

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engine in or out iggy? i may have a pic of mine without the engine, and i could go snap some of my alpine's bay.
 

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Bimmer engine ground is on the right side motor mount. Chassis-to-engine.

For the upper engine electrics(to run injectors and sensors), there should be a ground wire also in the rear of the cylinder head body(not the cover) to the firewall.

Ground wires in bimmers are color-coded solid brown.

Really, there's no harm in having more than 1 engine ground if only to secure good contact.
 
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