same issue here, X was possed! (@ 50K miles mind you) i got a bosch alternator from a local shop who happened to have one. 400$ or so last year. i believe the bosch part number is in on the BMW alternator. its a bit of of pain to weasel in and out of there but its possible. this is a good time to change out your water pump because you will have drained the coolant. i didnt change my water pump, cause i've become a aint broke dont fix it kinda guy.
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Originally Posted by ZsX5o3
I always wondered about that water-cooled alternator. Why did they do that?
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why water cooled? it's bigger than any alternator i've ever seen in a car/truck. 150Amp or so, and that engine compartment gets pretty toasty, (my 4.4 does if im behind the wheel) i dont think an alternator put in that situation would last too long if it were not cooled. (you could prob design one, but it would be much more than 400$)
