BMW Electrical Sensors, Switches, & Relays for BMW 3 Series F31 (2014+)

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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 Bosch Mass Air Flow Sensor (MAF) -- N20 N26 S55 S63 B38 B46 Z4
OEM Bosch Mass Air Flow Sensor (MAF) -- N20 N26 S55 S63 B38 B46 Z4 ...
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Bosch - Corporate Logo
T#:389744
Part#: 13627602038
In Stock
$ 246.99

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

$ 161.99 USD
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$ 161.99 USD
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The mass air flow sensor measures the amount of air flow to tell the computer how much fuel to add to the mixture. If the MAF sensor malfunctions, there could be too much or too little fuel added to the mixture.
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Hella Hella Horn - High Tone
Hella Hella Horn - High Tone
Hella - Corporate Logo
T#:592707
Part#: 2768551
In Stock
$ 30.99 USD
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$ 30.99 USD
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Disc Type High-Tone, 12 V, 400 Hz with Bracket
Hella Hella Horn - Low Tone
Hella Hella Horn - Low Tone
Hella - Corporate Logo
T#:590880
Part#: 2768082
In Stock
$ 36.99 USD
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$ 36.99 USD
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Disc Type Low-Tone, 12 V, 335 Hz with Bracket
Bosch Alternator - 210 amp - Remanufactured - $125 refundable core charge - BOSCH - E84, F10, F22, F23, F30, F31, F32, F33, F36, Z4
Bosch Alternator - 210 amp - Remanufactured - $125 refundable core ch...
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Bosch - Corporate Logo
T#:580223
Part#: AL9449X
In Stock at Vendor
$ 545.99

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

$ 530.99 USD
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$ 530.99 USD
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Bremi Crankshaft Sensor - 13627806782
Bremi Crankshaft Sensor - 13627806782
Bremi - Corporate Logo
T#:27871806
Part#: 13627806782
In Stock at Vendor
$ 71.99

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

$ 63.99 USD
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$ 63.99 USD
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The crankshaft position sensor tells the computer whether the timing is correct in the engine. Symptoms such as no start or extended cranking times can be a telltale sign that you need to replace your crankshaft positioning sensor that is either faulty or damaged.
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Hella Air Horn Kit
Hella Air Horn Kit
Hella - Corporate Logo
T#:592708
Part#: 3001651
In Stock at Vendor
$ 143.99

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

$ 139.99 USD
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$ 139.99 USD
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Get noticed with this air horn kit from Hella!
Bosch New Starter Motor - E84, F30, F31, F32, F34
Bosch New Starter Motor - E84, F30, F31, F32, F34
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Bosch - Corporate Logo
T#:639189
Part#: 12417638195
Ships in 3 Business Days
$ 324.99

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

$ 314.99 USD
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$ 314.99 USD
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Liqui-Moly Battery Clamp Grease - 50 grams
Liqui-Moly Battery Clamp Grease - 50 grams
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Liqui-Moly - Corporate Logo
T#:1195997
Part#: 20244
In Stock
14% 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.

$ 6.85 USD
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14% 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.

$ 6.85 USD
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Excellent corrosion protection for your battery and other connections
Hella Horn - High-Tone
Hella Horn - High-Tone
Hella - Corporate Logo
T#:592716
Part#: 7424011
In Stock
$ 17.99 USD
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$ 17.99 USD
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Upgrade the sound of your BMW or MINI with the Hella Horn - High-Tone. This high-quality horn delivers a powerful and attention-grabbing sound, enhancing safety on the road. Designed for easy installation, it provides a quick and effective way to improve the audible presence of your vehicle.

  • Powerful and attention-grabbing sound
  • Enhances safety on the road
  • Easy installation for convenience
  • Compatible with BMW and MINI models
  • High-quality construction for durability

Enhance the audible presence of your BMW or MINI with the Hella Horn - High-Tone, ensuring you're heard when it matters most.

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Hella Relay
Hella Relay
Hella - Corporate Logo
T#:592718
Part#: 965400001
Ships in 10 Business Days
$ 14.99 USD
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$ 14.99 USD
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12V 30A SPST relay with bracket
Knock Sensor
Knock Sensor
Bosch - Corporate Logo
T#:54388475
Part#: 13627636937
In Stock
New Item
$ 29.99 USD
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$ 29.99 USD
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Keep your ignition timing razor-sharp and your engine safe from destructive detonation. This replacement Knock Sensor acts as your engine's first line of defense, constantly listening for pre-ignition "pinging" or knocking.
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Hella Horn - Low-Tone
Hella Horn - Low-Tone
Hella - Corporate Logo
T#:28869559
Part#: 7424001
In Stock
$ 17.99 USD
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$ 17.99 USD
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Universal fit. Not direct fit.
15A Fuse - Priced Each
15A Fuse - Priced Each
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Bosch - Corporate Logo
T#:375327
Part#: 61131372626
In Stock at Vendor
$ 2.03 USD
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$ 2.03 USD
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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 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.
Walker MAP Sensor - BMW N20 N26 S55 S63
Walker MAP Sensor - BMW N20 N26 S55 S63
Walker - Corporate Logo
T#:39059258
Part#: 13627843531
In Stock at Vendor
$ 163.99

This product was last offered at the strikethrough price on
04-10-2026

$ 135.99 USD
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$ 135.99 USD
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This is a replacement Manifold Absolute Pressure sensor Located on the charge air cooler. The MAP controls the amount of fuel that goes through the injectors based on the pressure of air at the intake manifold. If your vehicle is giving you a MAP code, replace it immediately to ensure you get the best gas mileage and performance. It is common for this part to fail slowly and cause poor fuel mileage and hampered performance. When it fails, the vehicle will stutter and stall as it falls into a limp mode. One way to check if your MAP is bad is to unplug the connector before starting your car. If it idles well (compared to a previous poor idle), your MAP sensor likely needs to be replaced. If you let this maintenance part go, your fuel economy will suffer as too much fuel is going into the engine and not being burned. A great way to give your vehicle an efficiency boost.
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Knock Sensor
Knock Sensor
Meyle - Corporate Logo
T#:55353615
Part#: 12141716055
Special Order: No Guaranteed ETA
New Item
$ 28.99 USD
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$ 28.99 USD
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This Meyle replacement knock sensor is the perfect solution for keeping your high-performance engine safe and running at its absolute peak.
Remanufactured Bosch Starter - With Core Charge - F30 F31 F25 N47
Remanufactured Bosch Starter - With Core Charge - F30 F31 F25 N47 ...
For vehicles with production date up to 04/2014
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Bosch - Corporate Logo
T#:639731
Part#: 12418581097KT
Ships on Aug 18, 2026
$ 482.99 USD
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$ 482.99 USD
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This remanufactured starter from Bosch will allow your car to start like it is new. Includes $75 core charge.
OEM Bosch Remanufactured Starter - SR0861X - BMW F2X F3X N20 2.0L
OEM Bosch Remanufactured Starter - SR0861X - BMW F2X F3X N20 2.0L ...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Bosch - Corporate Logo
T#:639688
Part#: 12418614519BKT
Ships on Aug 18, 2026
$ 616.99

This product was last offered at the strikethrough price on
02-14-2026

$ 431.99 USD
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$ 431.99 USD
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*Price includes a refundable $75 Core Charge* If your car won't turn over, there is a good chance your starter is shot. Bosch's OEM starter is a high-quality replacement that will give you peace of mind thanks to its long life-span. Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products. As a leading source of high-performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!
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Remanufactured Bosch Starter - With Core Charge - F30 F31 F10 F02
Remanufactured Bosch Starter - With Core Charge - F30 F31 F10 F02 ...
For vehicles with production date from 04/2014
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Bosch - Corporate Logo
T#:639754
Part#: 12418581099KT
Ships on Aug 18, 2026
$ 437.99 USD
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$ 437.99 USD
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This remanufactured starter from Bosch will allow your car to start like it is new. Includes $75 core charge.
Hella Negative Battery Cable - F22, F23, F30, F31, F32, F33, F34, F36, F87
Hella Negative Battery Cable - F22, F23, F30, F31, F32, F33, F34, F3...
Hella - Corporate Logo
T#:583197
Part#: 61219117877
Special Order: No Guaranteed ETA
$ 150.99 USD
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$ 150.99 USD
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Cable for battery
Mass Air Flow Sensor (MAF)
Mass Air Flow Sensor (MAF)
Hella - Corporate Logo
T#:599887
Part#: 13627602038
Special Order: No Guaranteed ETA
$ 151.99 USD
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$ 151.99 USD
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Crankshaft Position Sensor
Crankshaft Position Sensor
Meyle - Corporate Logo
T#:55030834
Part#: 3148100013
Ships on Oct 30, 2026
New Item
$ 36.99 USD
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$ 36.99 USD
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This Meyle Crankshaft Position Sensor is the perfect solution for restoring the critical engine speed data your ECU relies on.
MEYLE Crank Position Sensor - BMW E46, E90
MEYLE Crank Position Sensor - BMW E46, E90
Meyle - Corporate Logo
T#:52621846
Part#: MPS0126
Special Order: No Guaranteed ETA
New Item
$ 29.99 USD
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$ 29.99 USD
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The Meyle MPS0126 Crankshaft Position Sensor is a robust replacement for aging or failing factory sensors that often trigger P0335 or P0339 trouble codes.
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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