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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
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Hitachi - Corporate Logo
T#:48850064
Part#: 12311747920
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$ 37.99 USD
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$ 37.99 USD
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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
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Beru - Corporate Logo
T#:596879
Part#: 12321350052
Back Ordered
$ 41.99

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

$ 40.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 40.99 USD
Free Shipping on orders $49 and up
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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
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Hitachi - Corporate Logo
T#:48815477
Part#: 12317550469
Ships in 6 Business Days
New Item
$ 79.99 USD
Free Shipping on orders $49 and up
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$ 79.99 USD
Free Shipping on orders $49 and up
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Supplies power to your car's electronics and recharges the battery.

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