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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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N52 Valvetronic Camshaft Adjuster Replacement Kit
N52 Valvetronic Camshaft Adjuster Replacement Kit
Packaged by Turner - Corporate Logo
T#:5416764
Part#: 11377548388TMSKT
Ships on Aug 12, 2026
Sale - Save 19% $ 220.99

This product was last offered at the strikethrough price on
05-03-2026

$ 179.20 USD
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$ 220.99

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05-03-2026

$ 179.20 USD
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Includes new Valvetronic motor, gasket, and hardware. The Valv-tronic adjuster unit changes the the timing shaft to adjust the valve timing.
BMW E6X / E8X / E9X - N52 Replacement Starter Kit
BMW E6X / E8X / E9X - N52 Replacement Starter Kit
Packaged by Turner - Corporate Logo
T#:15777314
Part#: SR0492NKT2-KT
In Stock
Sale - Save 8% $ 296.99

This product was last offered at the strikethrough price on
03-17-2026

$ 273.79 USD
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$ 296.99

This product was last offered at the strikethrough price on
03-17-2026

$ 273.79 USD
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Is your car having trouble starting? Does your starter click when you turn the key? Sounds like it's time for a new starter motor! Includes new starter with no core charge, intake gaskets, throttle body gasket and hardware.
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Exhaust Camshaft Sensor - E46 E39 E38 E60 E63 E65 X3 X5 Z3 Z4
Exhaust Camshaft Sensor - E46 E39 E38 E60 E63 E65 X3 X5 Z3 Z4 ...
Packaged by Turner - Corporate Logo
T#:338260
Part#: 12147518628HK
In Stock
Starting at $ 79.98 USD
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Starting at $ 79.98 USD
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This is the exhaust cam position sensor for cars with M52, M54, N62 engines. Choose either Genuine BMW or Hella brand. Hella manufactures the highest quality parts and is an OEM supplier to BMW. Includes BMW part numbers 12147518628 and 12141748398. Replaces BMW part number 12141438082.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1999-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 530i 545i
2004-2005 E63 BMW 645ci
2002-2005 E65 BMW 745i 745li
2004-2006 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
2004-2006 E53 BMW X5 4.4i 4.8i
1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
2003-2006 E85 BMW Z4 2.5i Z4 3.0i
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Eccentric Shaft Sensor Kit
Eccentric Shaft Sensor Kit
Packaged by Turner - Corporate Logo
T#:5416787
Part#: 11377524879TMSKT
In Stock
Sale - Save 18% $ 270.99

This product was last offered at the strikethrough price on
05-03-2026

$ 221.57 USD
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$ 270.99

This product was last offered at the strikethrough price on
05-03-2026

$ 221.57 USD
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Includes a new sensor as well as valve cover and eccentric gaskets for a complete service. The eccentric shaft sensor is known to fail and can be a costly repair at the dealer. Often caused by oil getting into the connection for the wiring harness and damaging the sensor and causing a check engine light. With this kit you get the the sensor along with new valve cover and eccentric shaft adjuster gaskets to ensure a complete leak free job.
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Eccentric Shaft Sensor Kit
Eccentric Shaft Sensor Kit
Packaged by Turner - Corporate Logo
T#:15677508
Part#: 11127581215-KT
In Stock
Sale - Save 18% $ 270.16

This product was last offered at the strikethrough price on
05-03-2026

$ 221.57 USD
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Sale - Save 18%
$ 270.16

This product was last offered at the strikethrough price on
05-03-2026

$ 221.57 USD
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The eccentric shaft sensor is known to fail and can be a costly repair at the dealer. Often caused by oil getting into the connection for the wiring harness and damaging the sensor and causing a check engine light. With this kit you get the the sensor along with new valve cover and eccentric shaft adjuster gaskets to ensure a complete leak free job.
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Hitachi Voltage Regulator - BMW E31 E32 E34 E36
Hitachi Voltage Regulator - BMW E31 E32 E34 E36
Hitachi - Corporate Logo
T#:48850064
Part#: 12311747920
Ships in 6 Business Days
$ 37.99 USD
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$ 37.99 USD
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This voltage regulator is a crucial component that controls the alternator's output, preventing overcharging by adjusting the current to maintain a safe range of vehicle voltage, thereby protecting the battery and electrical system. Symptoms of failure include dim lights, battery warnings, or a dead battery, often requiring replacement, which can be internal or external to the alternator.
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Alternator Pulley - E82 E90 E92 E60
Alternator Pulley - E82 E90 E92 E60
We Price Match - Give Us A Call or Chat!
Ina - Corporate Logo
T#:19332
Part#: 12317570152
Ships in 1 day
$ 66.99 USD
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$ 66.99 USD
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This OEM alternator pulley has a ratcheting mechanism inside that can wear out, causing a rattling sound. This mechanism allows the alternator to freewheel to a degree. This is only for the Valeo brand alternator/

This item fits the following BMWs:
2008+ E82 BMW 128i with N51 engine
2006-2007 E90 BMW 325i 325xi 330i 330xi - Sedan
2006-2007 E90 BMW 328i 328xi - Sedan with N51 engine
2006-2007 E91 BMW 325xi - Wagon
2007-2007 E92 BMW 328i 328xi 328i xDrive - Coupe with N51 engine
2006-2007 E60 BMW 525i 525xi 530i 530xi
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Crankshaft Position Sensor - E30 325e 325i 325is E34 525i
Crankshaft Position Sensor - E30 325e 325i 325is E34 525i
Packaged by Turner - Corporate Logo
T#:338003
Part#: 12141720852
Ships on Oct 20, 2026
Starting at $ 108.99 USD
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Starting at $ 108.99 USD
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This crank shaft position sensor (CPS) provides the engine computer with engine speed data via the harmonic balancer. It mounts off the engine block and reads the front crank pulley to tell the engine what position the engine internals are in. This sensor is crucial for starting the car as the ECU will not allow the engine to start without this signal. It fits all M20 engines in the E30 and E34. A lot of times the sensor is covered in oil, broken from a spinning belt, or the clearance to the pulley is not correct (should be .040"). Interchangeable with #12141720856.

Brand Options:
Original BMW - more expensive but higher quality and more consistent reliability. The sensor itself has a metal housing that is more durable and will not be affected by heat as much.
Aftermarket/Overseas manufacturer - cheaper than OE BMW but less quality and potentially less consistent. Plastic housing is more susceptible to damage from heat.

This item fits the following BMWs:
1987-1991 E30 BMW 325e 325es 325i 325is 325ix 325ic
1989-1990 E34 BMW 525i
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Voltage Regulator
Voltage Regulator
Beru - Corporate Logo
T#:596879
Part#: 12321350052
In Stock at Vendor
$ 41.99

This product was last offered at the strikethrough price on
05-07-2026

$ 40.99 USD
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$ 40.99 USD
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If you are having issues with voltage peaking, lights fading in and out as your driving, or your battery keeps dying despite the car running, It could be the result of a faulty voltage regulator. Voltage regulators control the amount of power coming from the alternator.
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Bosch Starter Motor With Hardware
Bosch Starter Motor With Hardware
Packaged by Turner - Corporate Logo
T#:56110332
Part#: SR0492NKT4
In Stock
New Item
$ 261.99 USD
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$ 261.99 USD
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At the core is a brand-new Bosch Starter Motor, engineered to withstand extreme operating conditions while delivering immediate cranking speed. This kit includes also the required Genuine BMW Aluminum Mounting Screw Set.
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Hitachi Camshaft Position Sensor - BMW E9X F3X F8X N20 N52 N55 S55
Hitachi Camshaft Position Sensor - BMW E9X F3X F8X N20 N52 N55 S55 ...
Hitachi - Corporate Logo
T#:48815454
Part#: 13627525014
Ships in 6 Business Days
$ 40.00 USD
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$ 40.00 USD
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The camshaft position sensor communicates the position of the camshaft to the computer. This helps the computer to calculate proper spark and fuel control. If you're struggling with CELs, hard starts or no starts, stalling, and/or a rough idle, you may need to replace the cam position sensor.
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Hitachi Engine Camshaft Position Sensor - BMW S63M N63B/N63M/N63R S68X/S68T
Hitachi Engine Camshaft Position Sensor - BMW S63M N63B/N63M/N63R S68...
Hitachi - Corporate Logo
T#:48850059
Part#: 13628697982
Ships in 6 Business Days
$ 48.99 USD
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$ 48.99 USD
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The camshaft position sensor communicates the position of the camshaft to the computer. This helps the computer to calculate proper spark and fuel control. If you're struggling with CELs, hard starts or no starts, stalling, and/or a rough idle, you may need to replace the cam position sensor.
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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 at Vendor
$ 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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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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Hitachi Engine Crankshaft Position Sensor - BMW N52 N54 S85 S65 S63
Hitachi Engine Crankshaft Position Sensor - BMW N52 N54 S85 S65 S63 ...
Hitachi - Corporate Logo
T#:48815471
Part#: 13627525015
Ships in 6 Business Days
$ 66.99 USD
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$ 66.99 USD
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The crankshaft position sensor transmits the crankshaft's position to the computer. This helps the computer to calculate proper spark and fuel control. If you're struggling with CELs, hard starts or no starts, stalling, and/or a rough idle, you may need to replace the crank position sensor.
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Hitachi Engine Crankshaft Position Sensor - BMW F2X F3X
Hitachi Engine Crankshaft Position Sensor - BMW F2X F3X
Hitachi - Corporate Logo
T#:48850074
Part#: 13627582842
Ships in 6 Business Days
$ 184.99 USD
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$ 184.99 USD
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Engine cranks but doesn't start? This sensor is often the issue.
Hitachi Crankshaft Sensor - BMW B46 B48 B58
Hitachi Crankshaft Sensor - BMW B46 B48 B58
Hitachi - Corporate Logo
T#:48850081
Part#: 13627806782
Ships in 6 Business Days
$ 81.99 USD
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$ 81.99 USD
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Tells the computer whether the timing is correct in the engine.
Hitachi Voltage Regulator - BMW E88 N52
Hitachi Voltage Regulator - BMW E88 N52
Hitachi - Corporate Logo
T#:48815477
Part#: 12317550469
Ships in 6 Business Days
$ 79.99 USD
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$ 79.99 USD
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Supplies power to your car's electronics and recharges the battery.
Oil Temperature Sensor And Gauge Kit - Blue & Red - Multiple BMWs
Oil Temperature Sensor And Gauge Kit - Blue & Red - Multiple BMWs ...
Packaged by Turner - Corporate Logo
T#:401689
Part#: OILTEMPGAUGEBRKK
Ships on Dec 2, 2026
Sale - Save 2% $ 196.99

This product was last offered at the strikethrough price on
05-03-2026

$ 193.26 USD
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Sale - Save 2%
$ 196.99

This product was last offered at the strikethrough price on
05-03-2026

$ 193.26 USD
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The EVO series from ProSport Gauges is an award winning, industry leading option for those looking to push their car's limits. They allowing you to monitor crucial engine functions in one quick glance with advanced precision. Featuring a dual color readout, you can customize your readout to your liking. Offering a user friendly readout with a digital reading in the center with a bar-graph style sweep around the gauge as well.
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Oil Temperature Sensor And Gauge Kit - Green & White - Multiple BMWs
Oil Temperature Sensor And Gauge Kit - Green & White - Multiple BMWs ...
Packaged by Turner - Corporate Logo
T#:401690
Part#: OILTEMPGAUGEKT1
Ships on Dec 2, 2026
Sale - Save 2% $ 196.99

This product was last offered at the strikethrough price on
05-03-2026

$ 193.26 USD
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Sale - Save 2%
$ 196.99

This product was last offered at the strikethrough price on
05-03-2026

$ 193.26 USD
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The EVO series from ProSport Gauges is an award winning, industry leading option for those looking to push their car's limits. They allowing you to monitor crucial engine functions in one quick glance with advanced precision. Featuring a dual color readout, you can customize your readout to your liking. Offering a user friendly readout with a digital reading in the center with a bar-graph style sweep around the gauge as well.
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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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Hitachi Crankshaft Position Sensor - BMW N20 N26 2.0L
Hitachi Crankshaft Position Sensor - BMW N20 N26 2.0L
Hitachi - Corporate Logo
T#:48815475
Part#: 13627595860
Back Ordered
$ 68.99 USD
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$ 68.99 USD
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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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OEM INA Alternator Pulley - Overrunning Type - E82, E88, E9x, F10, F22, F23, F25, F3x, F87
OEM INA Alternator Pulley - Overrunning Type - E82, E88, E9x, F10, F2...
Ina - Corporate Logo
T#:42167226
Part#: EA0141
Back Ordered
$ 71.99 USD
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$ 71.99 USD
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Whether you're replacing a failing alternator pulley or performing preventive maintenance, this Alternator Pulley ensures your BMW continues to perform with factory precision and reliability.
Hitachi Voltage Regulator - BMW E36 Z3 E34
Hitachi Voltage Regulator - BMW E36 Z3 E34
Hitachi - Corporate Logo
T#:48850070
Part#: 12321739435
Back Ordered
$ 60.99 USD
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$ 60.99 USD
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Alternator voltage regulators are a crucial component that controls the alternator's output, preventing overcharging by adjusting the current to keep vehicle voltage within a safe range, protecting the battery and electrical system. Symptoms of failure include dim lights, battery warnings, or a dead battery, often requiring replacement, which can be internal or external to the alternator
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Accessory Drive Belt Kit - E34, E83
Accessory Drive Belt Kit - E34, E83
Ina - Corporate Logo
T#:42167237
Part#: FB0198K
Back Ordered
$ 166.99 USD
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$ 166.99 USD
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Ideal for scheduled maintenance or as a preventive repair, the Accessory Drive Belt Kit offers dependable performance and peace of mind for BMW owners looking to maintain factory-quality operation and longevity
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OEM INA Alternator Pulley - E60, E90
OEM INA Alternator Pulley - E60, E90
Ina - Corporate Logo
T#:42167235
Part#: EA0202
Back Ordered
$ 46.99

This product was last offered at the strikethrough price on
06-19-2026

$ 33.99 USD
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$ 33.99 USD
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Whether you have a failing component or are performing preventive maintenance, this INA Alternator Pulley from Turner Motorsport is the perfect choice to keep your BMW’s electrical and accessory systems operating at peak performance.
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