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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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OEM Starter Motor - E46 M3 2001-2006

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T#:2988

Part#: 12417835735

Ships in 1 Business Day

$ 389.99 USD

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$ 389.99 USD

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This is the starter motor for BMW E46 M3 2001-2006 is an OEM Valeo unit.

This item fits the following BMWs:
2001-2006 E46 BMW M3. M3 Convertible
2001-2002 Z3 BMW Z3 M Roadster Z3 M Coupe
2005-2008 E85 BMW Z4 M Roadster Z4 M Coupe

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Meyle Crankshaft Position Sensor - E36, E39, E46, E53, E60, E83, Z3, ...

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T#:369703

Part#: 12141709616

In Stock

$ 46.99 USD

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$ 46.99 USD

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Does not include O-ring

E46 M3, MZ3 S54 OEM Valeo Alternator (New)

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T#:377735

Part#: 12317831436

In Stock at Vendor

$ 522.00

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

$ 473.99 USD

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$ 473.99 USD

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The alternator in your vehicle keeps the battery at full charge when your engine is running. Because all of your electronic systems run off of this small piece, it's important that it is operational. If your lights are dim while driving or your battery dies within minutes of starting your car, it's time for a new alternator.

This is a NEW alternator from the OEM manufacturer, Valeo. No core charge applies.

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Meyle Exhaust Camshaft Position Sensor - BMW S54 S62

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T#:55497462

Part#: 3148000038

In Stock

$ 27.99

This product was last offered at the strikethrough price on
09-14-2026

$ 25.99 USD

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$ 25.99 USD

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Don't let a failing camshaft position sensor rob your vehicle of power or cut your track day short. This Meyle replacement camshaft sensor is built to deliver fast, highly accurate data to the ECU, preventing the performance drops, sluggish throttle response, and rough idling caused by worn-out factory electronics. Engineered to withstand high underhood heat and intense vibrations, it keeps your ignition timing and fuel delivery tightly synced, whether you are daily driving or pushing through high-RPM pulls.

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Knock Sensor

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T#:35964551

Part#: 13627568422

Back Ordered

$ 75.99 USD

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$ 75.99 USD

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This sensor detects engine knocking or pinging and adjusts the timing to ensure optimal engine performance and efficiency.

Meyle M52 M54 Camshaft Position Sensor - 12147539165 - E46, E39, E60,...

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T#:20155632

Part#: 12147539165

Ships on Dec 1, 2026

$ 52.99 USD

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$ 52.99 USD

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A bad cam sensor can cause a variety of problems from hard starting to stalling at low speeds. Cam sensor replacement has been known to cure many drivabilty issues.

OEM Valeo Alternator - 120amp - E39 E46 E53 Z3, M54 with Valeo Altern...

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T#:371896

Part#: 12317501599

Ships on Dec 7, 2026

$ 323.99 USD

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$ 323.99 USD

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The alternator in your vehicle keeps the battery at full charge when your engine is running. Because all of your electronic systems run off of this small piece, it's important that it is operational. If your lights are dim while driving or your battery dies within minutes of starting your car, it's time for a new alternator.

This is a NEW alternator from the OEM manufacturer, Valeo. No core charge applies. Valeo is an OEM manufacturer for many BMW alternators - save money by buying the same alternator in a different box!

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Oil Pressure Switch (fits most BMWs)

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T#:363

Part#: 12617568480

In Stock

$ 7.99

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

$ 5.39 USD

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$ 5.39 USD

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Having your oil pressure light come on can mean very serious problems. Or it could just be this switch that fails several times over a car's lifespan. By no means should you ignore the warning light but replacing this sensor could be the actual culprit. The other problem with this switch is that oil can leak past its seal. With the oil under a lot of pressure at this point, the oil loss can be a serious concern. It's a simple replacement when doing most oil change work.

This Oil Pressure Switch fits the following BMWs:
1985-1991 E30 318i, 318is, 325e, 325i, M3
1992-1999 E36 318i/is, 325i/is, 328i/is, 323is, M3
1992-1997 E31 840i, 850i
1988-1994 E32 735i, 735iL, 740i, 740iL
1989-1995 E34 525i, 530i, 535i, 540i, M5
1995-2001 E38 740i, 740iL, 750i, 750iL
1996-2002 Z3 Roadster/Coupe 1.9, 2.3, 2.5, 2.8, 3.0, 3.2
1997-2003 E39 525i, 528i, 530i, 540i, M5
1999-2005 E46 323, 325, 328, 330, M3
2000-2003 Z8 roadster
2001-2006 E53 X5 X5 3.0i, X5 4.4i, X5 4.6is, X5 4.8is
2002+ E65/E66 745i, 745li, 750i, 750li, 760i, B7 Alpina
2003+ Z4 Roadster/Coupe Z4 2.5, 3.0, 3.0si
2004+ E60 525i, 530i, 535i, 545i, 550i, M5
2005+ E63/E64 645Ci, 650i, M6
2005+ E83 X3 X3 2.5, X3 3.0
2006+ E90/E92 325, 328, 330, 335
2007+ E70 X5 X5 3.0i, X5 4.8i

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Crankshaft Sensor O-Ring (18 X 1.2 Mm)

T#:13233505

Part#: 12141402705

Ships in 1 Business Day

$ 1.49

This product was last offered at the strikethrough price on
08-26-2026

$ 1.28 USD

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$ 1.28 USD

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This O-Ring can sometimes leak at the bottom of your engine and need to be replaced. Fits around the head of the lower crankshaft sensor and provides a connection point.

Oil Pressure Switch

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T#:5944185

Part#: 12618611273

Ships on Dec 4, 2026

$ 6.99 USD

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$ 6.99 USD

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This Meyle Oil Pressure Switch is the ideal service replacement to keep your BMW or European powerhouse performing reliably on the street or track.

Meyle Air Temperature Sensor - 13621739510 - E36, E46, E39, E38, E83,...

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T#:55281743

Part#: 13621739510

Ships on Dec 4, 2026

$ 21.99 USD

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$ 21.99 USD

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Meyle Camshaft Position Sensor - 12147518628 - 3, 5, 6, 7 Series, X3,...

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T#:59991931

Part#: 12147518628

Ships on Dec 4, 2026

$ 33.99 USD

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$ 33.99 USD

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Meyle S54 M3 Crankshaft Speed Sensor - 13627548994 - E46 M3

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T#:59991872

Part#: 13627548994

Ships on Dec 4, 2026

$ 41.99 USD

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$ 41.99 USD

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Meyle Outdoor Temperature Sensor / Probe

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T#:579266

Part#: 3009190001

Back Ordered

$ 44.99 USD

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$ 44.99 USD

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Common fix for incorrect OBC temperature readings

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