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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BMW M52 Engine Crankshaft Position Sensor
BMW M52 Engine Crankshaft Position Sensor
Delphi - Corporate Logo
T#:373958
Part#: 12141709616
In Stock
$ 97.99 USD
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$ 97.99 USD
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Ambient Temp. Sensor
Ambient Temp. Sensor
FAE - Corporate Logo
T#:31589381
Part#: 65816905133
In Stock
$ 20.99 USD
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$ 20.99 USD
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FAE Exhaust Camshaft Position Sensor
FAE Exhaust Camshaft Position Sensor
Sensor for the exhaust camshaft
FAE - Corporate Logo
T#:1196088
Part#: 13627796054
Ships on Dec 7, 2026
$ 74.99

This product was last offered at the strikethrough price on
09-16-2026

$ 54.99 USD
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$ 54.99 USD
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Located on rear of the cylinder head, sensing the exhaust cam
Hitachi Camshaft Position Sensor - Intake - BMW M52TU M54
Hitachi Camshaft Position Sensor - Intake - BMW M52TU M54
Hitachi - Corporate Logo
T#:48850072
Part#: 12147539165
In Stock
$ 41.99 USD
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$ 41.99 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. Uses O-ring # 12 141 748 398 (not included)
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Oil Pressure Switch (fits most BMWs)
Oil Pressure Switch (fits most BMWs)
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
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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Stop Light Switch
Stop Light Switch
FAE - Corporate Logo
T#:31092548
Part#: 61316967601
In Stock
$ 15.99 USD
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$ 15.99 USD
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Water / Oil Temperature Sensor - E46, E90 E92 E39 and more
Water / Oil Temperature Sensor - E46, E90 E92 E39 and more
FAE - Corporate Logo
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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Hitachi Camshaft Position Sensor - E39, E46, E53, E60, E63, E64, E65, E66, E83, Z3, Z4
Hitachi Camshaft Position Sensor - E39, E46, E53, E60, E63, E64, E65,...
Hitachi - Corporate Logo
T#:48850055
Part#: 12147518628
Ships in 2 Business Days
$ 71.99 USD
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$ 71.99 USD
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The camshaft position sensor is essential for assisting the engine DME by monitoring the camshaft's position. The data from this sensor is key to optimizing ignition timing and ensuring smooth engine performance. Often referred to as the CMP sensor, this component is crucial for the overall functionality of the powertrain. A failing camshaft position sensor can cause a range of issues, including engine stumbling, hesitation during acceleration, power loss, and even starting difficulties or complete failure to start.
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FAE Air Temperature Sensor - E36, E38, E39, E46, E53, E83
FAE Air Temperature Sensor - E36, E38, E39, E46, E53, E83
FAE - Corporate Logo
T#:596540
Part#: 13621739510
In Stock
$ 12.99 USD
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$ 12.99 USD
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Monitors intake air temperature
Temperature Sensor Wiring Repair Kit
Temperature Sensor Wiring Repair Kit
SenCom - Corporate Logo
T#:59038384
Part#: 10171
Ships on Dec 8, 2026
New Item
$ 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.
Hitachi Crankshaft Position Sensor - BMW M52 S52 M54
Hitachi Crankshaft Position Sensor - BMW M52 S52 M54
Hitachi - Corporate Logo
T#:48815470
Part#: 12141709616
Back Ordered
$ 32.99 USD
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$ 32.99 USD
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NOTE: Does not include o-ring seal - see BMW # 12141748398 This is the crankshaft position sensor. It provides information for the ECU. A faulty sensor can cause issues with timing adjustment and limit performance and vehicle operation. Replace your sensor with a high-quality Hitachi sensor to restore peak performance.
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FAE Oil Pressure Switch - M12x1.5
FAE Oil Pressure Switch - M12x1.5
FAE - Corporate Logo
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
FAE Oil Pressure Switch - M12x1.5
FAE Oil Pressure Switch - M12x1.5
FAE - Corporate Logo
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

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