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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 7 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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SEG Automotive Alternator - SEG Automotive 0121.715.118 - 12317560985 - E70 X5
SEG Automotive Alternator - SEG Automotive 0121.715.118 - 12317560985...
SEG Automotive - Corporate Logo
T#:54851991
Part#: 12317560985
Ships in 2 Business Days
New Item
$ 1,049.99

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

$ 952.99 USD
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$ 952.99 USD
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MINI Alternator - SEG Automotive 0125.711.078
MINI Alternator - SEG Automotive 0125.711.078
SEG Automotive - Corporate Logo
T#:54851993
Part#: 12317613445
In Stock
New Item
$ 564.99

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

$ 563.99 USD
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$ 563.99 USD
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SEG Automotive Alternator - SEG Automotive 0124.525.588 - 12317541694 - E46 325i 325Ci 330Ci, E60 525i 530i, E83 X3
SEG Automotive Alternator - SEG Automotive 0124.525.588 - 12317541694...
SEG Automotive - Corporate Logo
T#:54851984
Part#: 12317541694
Ships in 2 Business Days
New Item
$ 521.99

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

$ 470.99 USD
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$ 470.99 USD
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SEG Automotive Starter - SEG Automotive 0001.108.460 - 12417610344 - E60, E63 E64 6 Series, E65 E66 7 Series, E53, E70
SEG Automotive Starter - SEG Automotive 0001.108.460 - 12417610344 - ...
SEG Automotive - Corporate Logo
T#:55857741
Part#: 12417610344
Ships in 2 Business Days
New Item
$ 368.99

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

$ 337.99 USD
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$ 337.99 USD
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MINI Alternator - SEG Automotive 0124.325.157
MINI Alternator - SEG Automotive 0124.325.157
SEG Automotive - Corporate Logo
T#:54851988
Part#: 12317550319
Ships in 2 Business Days
New Item
$ 473.99

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

$ 431.99 USD
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$ 431.99 USD
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SEG Automotive Alternator - SEG Automotive 0124.515.223 - 12317519618 - E46
SEG Automotive Alternator - SEG Automotive 0124.515.223 - 12317519618...
SEG Automotive - Corporate Logo
T#:54851980
Part#: 12317519618
Ships in 2 Business Days
New Item
$ 503.99

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

$ 457.99 USD
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$ 457.99 USD
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Hitachi Voltage Regulator - 12317550469 - E88 128i
Hitachi Voltage Regulator - 12317550469 - E88 128i
Hitachi - Corporate Logo
T#:48815477
Part#: 12317550469
Ships in 7 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.
SEG Automotive New Alternator - 0124.525.523 - E46 325i 325Ci 330Ci, E60 525i 530i, E83 X3
SEG Automotive New Alternator - 0124.525.523 - E46 325i 325Ci 330Ci, ...
SEG Automotive - Corporate Logo
T#:58965213
Part#: 0124.525.523
Ships on Nov 25, 2026
New Item
$ 495.99 USD
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$ 495.99 USD
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Your BMW's charging system powers everything from ignition to infotainment, so a weak alternator affects the whole car.
SEG Automotive New 120A Alternator - 0124.515.052 - E46, E39 525i 530i, E53 X5
SEG Automotive New 120A Alternator - 0124.515.052 - E46, E39 525i 530...
SEG Automotive - Corporate Logo
T#:58965210
Part#: 0124.515.052
Ships on Nov 25, 2026
New Item
$ 485.99 USD
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$ 485.99 USD
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A strong charging system keeps everything from your ignition to your stereo working at its best, and a failing alternator can undermine all of it.
SEG Automotive Alternator - 12311711204 - E24 635CSi
SEG Automotive Alternator - 12311711204 - E24 635CSi
SEG Automotive - Corporate Logo
T#:59001785
Part#: 12311711204
Ships on Nov 25, 2026
New Item
$ 726.99 USD
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$ 726.99 USD
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The E24 M635CSi is one of BMW's great grand tourers, and keeping one healthy means a charging system you can count on.

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