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Voltage Regulator Replacement

Old 04-05-2019, 04:39 PM
Thread Starter
Join Date: Jun 2012
Posts: 62
Default Voltage Regulator Replacement

Hi guys, seems like the Valeo voltage regulator (part # 12-31-7-546-283) is discontinued.

Does anyone know where I can buy one or if I can replace it with a Bosch branded voltage regulator?

If not, I'm guessing I would have to purchase a brand new alternator altogether.
bmwm3gtr is offline  
Old 04-09-2019, 12:50 PM
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Join Date: Jan 2018
Location: Albuquerque, NM
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My Ride: 2008 550i E60
Model Year: 2008
Engine: N62

How old is the alternator? Is it the original one? If so, I'd just replace with a brand new alternator.
NFJ79 is offline  
Old 04-13-2019, 12:02 PM
Join Date: Feb 2004
Location: Ft.Lauderdale and Connecticut
Posts: 61
My Ride: 530i base, blue with saddle leather
Model Year: 2007
Engine: N52

No, you can't swap in a Bosch regulator -- completely different.

You don't need a BMW branded regulator. Look up the BMW part number for your Valeo alternator at realoem, and Google alternator suppliers. You can cross reference the BMW to Valeo parts available from non-BMW alternator suppliers, who sell identical Valeo parts to the aftermarket.

My Valeo regulator was available from an alternator warehouse for $40 or so.

You can also solder in new brushes for $10 or so -- they're the only parts that wears on these.
banglenot is offline  
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