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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

T#:48850064

Part#: 12311747920

Ships in 6 Business Days

$ 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

T#:596879

Part#: 12321350052

In Stock at Vendor

$ 41.99

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

$ 40.99 USD

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$ 40.99 USD

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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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BMW Alternator - SEG Automotive 0121.715.118

T#:54851991

Part#: 12317560985

Ships in 2 Business Days

$ 1,049.99

This product was last offered at the strikethrough price on
07-16-2026

$ 949.99 USD

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$ 949.99 USD

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MINI Alternator - SEG Automotive 0125.711.078

T#:54851993

Part#: 12317613445

Ships in 2 Business Days

$ 564.99

This product was last offered at the strikethrough price on
07-16-2026

$ 509.99 USD

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$ 509.99 USD

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MINI Alternator - SEG Automotive 0124.325.157

T#:54851988

Part#: 12317550319

Ships in 2 Business Days

$ 473.99

This product was last offered at the strikethrough price on
07-16-2026

$ 430.99 USD

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$ 430.99 USD

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BMW Starter - SEG Automotive 0001.108.460

T#:55857741

Part#: 12417610344

Ships in 2 Business Days

$ 368.99

This product was last offered at the strikethrough price on
07-16-2026

$ 330.99 USD

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$ 330.99 USD

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BMW Alternator - SEG Automotive 0124.525.588

T#:54851984

Part#: 12317541694

Ships in 2 Business Days

$ 521.99

This product was last offered at the strikethrough price on
07-16-2026

$ 468.99 USD

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$ 468.99 USD

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BMW Alternator - SEG Automotive 0124.515.223

T#:54851980

Part#: 12317519618

Ships in 2 Business Days

$ 503.99

This product was last offered at the strikethrough price on
07-16-2026

$ 453.99 USD

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$ 453.99 USD

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Hitachi Voltage Regulator - BMW E88 N52

T#:48815477

Part#: 12317550469

Ships in 6 Business Days

$ 79.99 USD

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$ 79.99 USD

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Supplies power to your car's electronics and recharges the battery.

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