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BMW Electrical Sensors, Switches, & Relays for BMW 3 Series E46 (1999-2005)

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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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New Alternator - 120A

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:25042543

Part#: 12317501690

In Stock

Sale - Save 20% $ 211.99

This product was last offered at the strikethrough price on
11-07-2026

$ 169.59 USD

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Sale - Save 20%

$ 211.99

This product was last offered at the strikethrough price on
11-07-2026

$ 169.59 USD

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Alternator - 120amp

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:25042542

Part#: 12317831436

In Stock

Sale - Save 25% $ 222.99

This product was last offered at the strikethrough price on
11-07-2026

$ 167.24 USD

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Sale - Save 25%

$ 222.99

This product was last offered at the strikethrough price on
11-07-2026

$ 167.24 USD

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Genuine BMW Terminal Socket - Mcon 2.8 - Multiple BMWs

T#:40627

Part#: 12527567482

In Stock

Sale - Save 52% $ 1.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 0.95 USD

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Sale - Save 52%

$ 1.99

This product was last offered at the strikethrough price on
11-07-2026

$ 0.95 USD

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Used in a wide variety of BMW connectors, these terminal sockets can come in handy when working on your wiring components.

Genuine BMW Camshaft Position Sensor Connector Repair Kit

T#:58052445

Part#: 12527507526KT2

In Stock

$ 25.18 USD

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$ 25.18 USD

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SEG Automotive Alternator - SEG Automotive 0124.525.588 - 12317541694...

T#:54851984

Part#: 12317541694

Ships in 1 Business Day

$ 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 Alternator - SEG Automotive 0124.515.223 - 12317519618...

T#:54851980

Part#: 12317519618

Ships on Dec 7, 2026

$ 503.99

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

$ 500.99 USD

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$ 500.99 USD

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Wire Pinning Kit - MLK 1.2 Female Jack

T#:55281746

Part#: 125275WRKT

Ships in 1-2 days

$ 37.40 USD

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$ 37.40 USD

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This Genuine BMW wiring repair kit is the ideal solution to refresh worn-out terminal connections in your Ultimate Driving Machine.

SEG Automotive New 150A Alternator - 0124.525.561 - E21, E30, E36, E4...

T#:58965212

Part#: 0124.525.561

Ships on Dec 7, 2026

$ 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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Temperature Sensor Wiring Repair Kit

T#:59038384

Part#: 10171

Ships on Dec 7, 2026

$ 32.99 USD

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$ 32.99 USD

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SenCom's repair kit restores it with a 2-wire, 200mm pigtail of silicone-insulated copper-tin wire.

SEG Automotive New 120A Alternator - 0124.515.052 - E46, E39 525i 530...

T#:58965210

Part#: 0124.515.052

Ships on Dec 7, 2026

$ 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 New Alternator - 0124.525.523 - E46 325i 325Ci 330Ci, ...

T#:58965213

Part#: 0124.525.523

Ships on Dec 7, 2026

$ 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.

Bosch Starter Solenoid - 12411427080 - E36, E46, E34, E39, E60, E83 ...

T#:57231530

Part#: 12411427080

Special Order: No Guaranteed ETA

$ 78.99 USD

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$ 78.99 USD

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When you are at the track or gearing up for a weekend backroad drive, the last thing you need is a sluggish starter holding your BMW back.

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