E46Fanatics - View Single Post - BMW E46 Alternator DIY (voltage regulator)
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Old 05-17-2012, 02:23 PM   #92
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Join Date: Apr 2009
Location: Boston
Posts: 111
My Ride: '01 325xiT, '85 M635
Sounds like the first thing to do would be to check all your wires are secure and there isn't any corrosion. Especially the grounds.

But it sounds like your new regulator is a dud. How much did you pay for it? If you got a good deal you probably got a refurbished one. I replaced mine the first time with a $50 one from Pelican parts and had oscillating headlights. Turns out it was a refurb. Second time I paid full price for a new one from Bav Auto. Works like a charm.

The good news is that with a regulator in your hand and the experience of doing this once already, you can replace the regulator without removing the whole alternator (though it does require some dexterity to get your hands around the back of the alternator.
...................2001 325Xi Touring..................1985 M635Csi..................

Last edited by Sixracer; 05-17-2012 at 02:36 PM.
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