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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 12-05-2005, 01:30 PM   #1
wrooster
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Join Date: Jun 2005
Location: NJ
Posts: 21
My Ride: 1999 323i / E46
voltage regulator HOW-TO? anyone done it?

folks,
looking to replace the voltage regulator module on my 1999 e46 323i sedan.
anyone done this?

from http://www.realoem.com/bmw/ ...
VOLTAGE REGULATOR BOSCH 1 12311713491 $111.32

thanks
jim / wrooster

ps:
my symptom is a very slight dimming of headlights when driving. car starts fine, just this morning it was about 20'F outside and no problem getting going.
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Old 12-05-2005, 06:33 PM   #2
K:^P
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Join Date: Jul 2003
Location: OCCal;BACal
Posts: 651
My Ride: 00 323//65 Fastback
The regulator is on the alternator. Most of the time if the regulator is bad, it would over charge. You can simply check the voltage by attaching a voltmeter to the battery while the car is running. Reading 14v-15v would good. Below 12v, not good. 18v, not good either.

The alternator is held by two bolts, I believe one of them is at the idle pulley. Have not done it, but heard it's not that differcult.
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