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BMW Electrical Sensors, Switches, & Relays

Electrical gremlins can be very frustrating. Luckily your BMW's electrical system is better than most, even if it's 25 years old. Here you will find electrical relays, sensors, switches, and modules for the engine, camshaft, and crankshaft. Our parts are OEM, Genuine BMW, or approved aftermarket brands that we have an excellent track record with. There is no middle ground with electrical parts - it either works perfectly or not. And there's nothing more frustrating than a new part that fails right out of the box. So it's important to choose quality replacement parts over a cheap but faulty piece.

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BMW Alternator - SEG Automotive 0121.715.118
BMW Alternator - SEG Automotive 0121.715.118
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

$ 961.99 USD
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$ 961.99 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
Ships in 2 Business Days
New Item
$ 564.99

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

$ 521.99 USD
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$ 521.99 USD
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BMW Starter - SEG Automotive 0001.108.460
BMW Starter - SEG Automotive 0001.108.460
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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BMW Alternator - SEG Automotive 0124.515.223
BMW Alternator - SEG Automotive 0124.515.223
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

$ 462.99 USD
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$ 462.99 USD
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MINI Starter - SEG Automotive 0001.106.026
MINI Starter - SEG Automotive 0001.106.026
SEG Automotive - Corporate Logo
T#:54851997
Part#: 12411489995
Ships in 2 Business Days
New Item
$ 432.99

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

$ 406.99 USD
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$ 406.99 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

$ 436.99 USD
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$ 436.99 USD
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BMW Alternator - SEG Automotive 0124.525.588
BMW Alternator - SEG Automotive 0124.525.588
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

$ 474.99 USD
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$ 474.99 USD
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New 120A Alternator
New 120A Alternator
SEG Automotive - Corporate Logo
T#:58965210
Part#: 0124.515.052
Ships on Nov 4, 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.
New Alternator
New Alternator
SEG Automotive - Corporate Logo
T#:58965213
Part#: 0124.525.523
Ships on Nov 4, 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.
Starter Motor
Starter Motor
SEG Automotive - Corporate Logo
T#:59001789
Part#: 12417570487
Ships on Nov 4, 2026
New Item
$ 325.99 USD
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$ 325.99 USD
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This SEG Automotive unit is built as a direct replacement for the factory 0.9 kW starter on the R50 Hatch and R52 Convertible.
New 150A Alternator
New 150A Alternator
SEG Automotive - Corporate Logo
T#:58965212
Part#: 0124.525.561
Ships on Nov 4, 2026
New Item
$ 487.99 USD
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$ 487.99 USD
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SEG Automotive, the company behind Bosch's starter motor and generator business, builds this brand-new 150-amp alternator with a freewheel pulley that smooths out belt loads for a quieter, longer-lasting accessory drive.
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Starter Motor
Starter Motor
SEG Automotive - Corporate Logo
T#:58965209
Part#: 0001.148.508
Ships on Nov 4, 2026
New Item
$ 274.99 USD
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$ 274.99 USD
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A healthy starter is what gets your BMW from parked to pulling away without a second thought.
Alternator
Alternator
SEG Automotive - Corporate Logo
T#:59001785
Part#: 12311711204
Ships on Nov 4, 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.
New Starter Motor
New Starter Motor
SEG Automotive - Corporate Logo
T#:58965208
Part#: 0001.170.202
Ships on Nov 4, 2026
New Item
$ 216.99 USD
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$ 216.99 USD
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The smart choice for F-chassis owners who want their car starting on the first try, every time.
Starter Motor
Starter Motor
SEG Automotive - Corporate Logo
T#:59001784
Part#: 12417616698
Ships on Nov 4, 2026
New Item
$ 275.99 USD
Add to Wish List
$ 275.99 USD
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On a MINI built for quick, spirited driving, there is no reason to put up with slow or hesitant cranking.
Starter
Starter
SEG Automotive - Corporate Logo
T#:59001787
Part#: 12418589891
Ships on Nov 4, 2026
New Item
$ 276.99 USD
Add to Wish List
$ 276.99 USD
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Modern G-chassis BMWs deliver serious performance, and none of it matters if the engine won't start.

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