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Alternator

The alternator keeps the battery in a constant state of charge anytime the engine is running. If your lights are dimming or you hear excessive bearing noise around the alternator, chances are that it's time for a replacement.
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Hitachi Voltage Regulator - BMW E31 E32 E34 E36
Hitachi Voltage Regulator - BMW E31 E32 E34 E36
Hitachi - Corporate Logo
T#:48850064
Part#: 12311747920
Ships in 6 Business Days
$ 37.99 USD
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$ 37.99 USD
Free Shipping on orders $49 and up
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This voltage regulator is a crucial component that controls the alternator's output, preventing overcharging by adjusting the current to maintain a safe range of vehicle voltage, thereby protecting the battery and electrical system. Symptoms of failure include dim lights, battery warnings, or a dead battery, often requiring replacement, which can be internal or external to the alternator.
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Voltage Regulator
Voltage Regulator
Beru - Corporate Logo
T#:596879
Part#: 12321350052
Back Ordered
$ 41.99

This product was last offered at the strikethrough price on
05-07-2026

$ 39.71 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 39.71 USD
Free Shipping on orders $49 and up
Add to Wish List
If you are having issues with voltage peaking, lights fading in and out as your driving, or your battery keeps dying despite the car running, It could be the result of a faulty voltage regulator. Voltage regulators control the amount of power coming from the alternator.
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Hitachi Voltage Regulator - BMW E88 N52
Hitachi Voltage Regulator - BMW E88 N52
Hitachi - Corporate Logo
T#:48815477
Part#: 12317550469
Ships in 6 Business Days
$ 79.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 79.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Supplies power to your car's electronics and recharges the battery.

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