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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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Febi Camshaft Position Sensor - Intake - E39 E46 E53 E60 E83 Z3 Z4 ...

Includes o-ring.

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T#:591868

Part#: 12147539165

In Stock

$ 31.99 USD

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$ 31.99 USD

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Febi Camshaft Position Sensor

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T#:368897

Part#: 12147518628

Ships in 1 Business Day

$ 48.99

This product was last offered at the strikethrough price on
09-01-2026

$ 40.99 USD

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$ 40.99 USD

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A faulty cam sensor can lead to issues like difficulty starting and stalling at low speeds. Replacing the cam sensor often resolves many drivability problems. Requires O-ring #12141748398 (not included).

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Water / Oil Temperature Sensor - E46, E90 E92 E39 and more

T#:7256

Part#: 13621433076

In Stock

$ 16.99

This product was last offered at the strikethrough price on
09-26-2026

$ 14.99 USD

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$ 14.99 USD

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This coolant / oil temperature sensor is mounted in the cylinder head and/or the oil filter housing and/or water pump/ thermostat housing. Also used as an oil temperature sensor on cars with SMG transmissions.

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Febi Relay - Replaces White/Green

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T#:16375128

Part#: 61368373700

Ships on Feb 11, 2027

Sale - Save 28% $ 15.99

This product was last offered at the strikethrough price on
05-15-2026

$ 11.56 USD

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Sale - Save 28%

$ 15.99

This product was last offered at the strikethrough price on
05-15-2026

$ 11.56 USD

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This relay is often the fuel pump relay for many BMW models. To ensure the relay is correct for your car please check the pin locations

Liqui-Moly Battery Clamp Grease - 50 grams

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!
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T#:1195997

Part#: 20244

In Stock

30% off MSRP $ 7.99

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

$ 5.59 USD

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30% off MSRP

$ 7.99

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

$ 5.59 USD

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Excellent corrosion protection for your battery and other connections

Febi Outdoor Temperature Sensor / Probe

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T#:382731

Part#: 65816936953

Ships in 1 Business Day

$ 20.79

This product was last offered at the strikethrough price on
10-21-2026

$ 19.99 USD

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$ 19.99 USD

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Common fix for incorrect OBC temperature readings

Stop Light Switch

T#:31092548

Part#: 61316967601

In Stock

$ 15.99 USD

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$ 15.99 USD

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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.

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 in 1 Business Day

$ 503.99

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

$ 458.99 USD

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$ 458.99 USD

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FAE Air Temperature Sensor - E36, E38, E39, E46, E53, E83

T#:596540

Part#: 13621739510

In Stock

$ 12.99 USD

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$ 12.99 USD

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Monitors intake air temperature

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

T#:58965212

Part#: 0124.525.561

Ships on Dec 8, 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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SEG Automotive New 120A Alternator - 0124.515.052 - E46, E39 525i 530...

T#:58965210

Part#: 0124.515.052

Ships on Dec 8, 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 8, 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.

Febi Alternator - 12317501690 - E46, E39 525i 528i 530i, E53 X5 ...

T#:56544002

Part#: 12317501690

Special Order: No Guaranteed ETA

$ 245.99 USD

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$ 245.99 USD

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Trust Febi Bilstein for clean power output and dependable performance every time you start your engine.

Febi Crankshaft Sensor With Sealing Ring - 12141709616 - E36, E46, E3...

T#:56507847

Part#: 12141709616

Special Order: No Guaranteed ETA

$ 14.99 USD

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$ 14.99 USD

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Keep your BMW’s engine management system operating at peak performance with this replacement crankshaft position sensor from Febi Bilstein.

Febi M54 Starter Motor - 12412354693 - E46, E39, E60, E83

T#:56724716

Part#: 12412354693

Special Order: No Guaranteed ETA

$ 147.99 USD

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$ 147.99 USD

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This Febi Bilstein starter motor delivers the cranking performance your BMW needs for instant ignition response every time you turn the key.

FAE Oil Pressure Switch - M12x1.5

T#:377029

Part#: 12612367061

Back Ordered

$ 5.99 USD

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$ 5.99 USD

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Leaking or malfunctioning oil pressure switches can be disastrous

FAE Oil Pressure Switch - M12x1.5

T#:374049

Part#: 12617568480

Back Ordered

$ 7.99 USD

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$ 7.99 USD

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Leaking or malfunctioning oil pressure switches can be disastrous

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