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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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Old 04-03-2009, 07:42 AM
htwnbmr htwnbmr is offline
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Location: HOUSTON
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Mein Auto: BMW 325Ci
Question '03 e46 alternator problem

gm, i have a '03 325ci w/129k; my battery light came on, and i have been told the problem lies w/my alternator; my question is can i get by w/just a voltage regulator? and not spend big bucks on an alternator; any suggestions would be greatly appreciated!
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Old 04-03-2009, 07:49 AM
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KrisL KrisL is offline
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Mein Auto: 330i ZHP
Probably, if you can disassemble the alternator and just find a voltage regulator - it's generally not a part sold separately.
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Old 04-06-2009, 02:43 PM
BMWmungry BMWmungry is offline
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Location: West Sussex, UK (England)
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Mein Auto: 328i M Sport Tourer (F31)
Just been looking through here and found your post! Check out my post I have just written!
(Alternator failure) 325i E46 2002 sport tourer

Beware and check you vent pipe is not blocked it you have one!! Not sure if all models have them etc.

Also you probably can buy a regulator from a reconditioning place near you! I was lucky and had mate in the trade to help.

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Old 04-07-2009, 07:14 PM
Lbert Lbert is offline
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Location: Richardson, TX
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Mein Auto: 325i
This place carries the regulator to both the Valeo and Bosch alternators. http://www.rmeuropean.com/bmw-parts.aspx#Category
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