Is there more than one alternator for the M30?

[Jason]

Mine died this morning and i want make sure i get the right one and I dont know if they used a different one for E28s. If anyone has any info it would be appreciated. TIA

J

[Jason]

I need to get one locally and i dont have time to go through BMA. For the most part they are rebuilt ones right?

[Derek A.]

I need to get one locally and i dont have time to go through BMA. For the most part they are rebuilt ones right?

part # 12 31 1 466 088 Alternator 140 Amp

part # 12 31 1 466 091 Alternator 115 Amp

You need to see which one your car came with, I would guess the 140A. I would not skimp on the source for the alternator. You should get a Bosch reman - a lot of the local rebuilt stuff is junk. Will blow up 6 months after you put it on.

[Dash01]

Is it a failed alternator, or just the voltage regulator?

Could even be a simple as replacing worn regulator brushes, which cost next to nothing.

If just the regulator, an aftermarket replacement (including brushes) can be had for ~$13 at local parts stores, and it plugs into the outside rear of the alternator case. Just be sure to disconnect the battery first, making note of the radio anti-theft code before you do, to re-set the radio after reconnecting the battery.

[shogun]

The Bosch voltage regulators cost abt. 45 $. But there are much cheaper no-name products on the market like this one:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7960922375&category=46098&sspagename=WDVW
This might not fit yours, but you could contact that company.
Have no experience with these no name regulators, maybe someone can tell his experience.
I also want to buy a spare voltage regulator for my E32 750iL VIN 3055570. Does someone know the Bosch number for that and/or the number of one of the no-name products. It is just for spare, so only just for day X when I do not want to pay the $$$ to the dealer.