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BMW Electrical Sensors, Switches, & Relays for BMW 4 Series F32 (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 ...

T#:389744

Part#: 13627602038

Ships in 2 Business Days

$ 247.99

This product was last offered at the strikethrough price on
08-03-2026

$ 209.99 USD

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$ 209.99 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 - Low Tone

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

Hella Hella Horn - High Tone

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

Bosch Alternator - 210 amp - Remanufactured - $125 refundable core ch...

T#:580223

Part#: AL9449X

Ships in 2 Business Days

$ 575.99 USD

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$ 575.99 USD

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Hella Air Horn Kit

T#:592708

Part#: 3001651

Ships in 2 Business Days

$ 143.99

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

$ 124.99 USD

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$ 124.99 USD

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Get noticed with this air horn kit from Hella!

Bosch Remanufactured Starter Motor - BMW N55 S55 3.0L

For vehicles with an Automatic Transmission

T#:40004862

Part#: SR9521XKT

Ships in 2 Business Days

$ 465.99

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

$ 436.99 USD

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$ 436.99 USD

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The advertised price includes a refundable $60 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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Valeo New Starter Motor - E70, E71, E82, E84, E88, E92, E93, F10, F30...

For vehicles with production date from 03/2011

We Price Match - Give Us A Call or Chat!

T#:594588

Part#: 12417616502

In Stock

$ 265.76 USD

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$ 265.76 USD

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Brand new unit - no core charge! Avoid messing with a core return entirely!

Bosch New Starter Motor - E84, F30, F31, F32, F34

T#:639189

Part#: 12417638195

Ships in 4 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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Denso Alternator

T#:384619

Part#: 12317616119

Back Ordered

$ 442.99 USD

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$ 442.99 USD

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Denso Brand

When power starts to fade in your BMW, chances are your alternator is losing power. The warning light should illuminate, warning you of such a failure. Replace with a new unit today. Do not get stuck on the side of the road.

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Hella Horn - Low-Tone

T#:28869559

Part#: 7424001

Ships in 3 Business Days

$ 17.99 USD

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$ 17.99 USD

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Universal fit. Not direct fit.

Hella Relay

T#:592718

Part#: 965400001

In Stock

$ 14.99 USD

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$ 14.99 USD

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12V 30A SPST relay with bracket

Hella Horn - High-Tone

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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Knock Sensor

T#:54388475

Part#: 13627636937

In Stock

$ 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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15A Fuse - Priced Each

T#:375327

Part#: 61131372626

In Stock at Vendor

$ 2.03 USD

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$ 2.03 USD

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Denso Starter Motor - BMW N55 S55 3.0L

For vehicles with an Automatic Transmission

T#:40004863

Part#: 12417631559

Ships in 2 Business Days

$ 461.99

This product was last offered at the strikethrough price on
05-04-2026

$ 396.99 USD

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$ 396.99 USD

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If your car won't turn over, there is a good chance your starter is shot. Denso's OEM starter is a high quality replacement that will give you peace of mind thanks to its long life-span.

OEM Bosch Remanufactured Alternator (215 amp) - AL9450X - F22 F3X F07...

T#:639763

Part#: 12317616121BKT

Ships on Nov 6, 2026

$ 558.99 USD

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$ 558.99 USD

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*Price includes a refundable $100 Core Charge* 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. 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! Bosch Part Numbers: AL9450X, 0986UR6231 Replaces the following BMW part numbers: 12317616119, 12317616121

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OEM Bosch Remanufactured Starter - SR0861X - BMW F2X F3X N20 2.0L ...

T#:639688

Part#: 12418614519BKT

Ships on Nov 6, 2026

$ 441.99

This product was last offered at the strikethrough price on
05-08-2026

$ 431.99 USD

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Qty

$ 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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Starter - Remanufactured

T#:57267807

Part#: 12418621839

Special Order: No Guaranteed ETA

$ 342.99 USD

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$ 342.99 USD

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Remanufactured Alternator - 12V - 170A

T#:57267766

Part#: 12317605478

Special Order: No Guaranteed ETA

$ 499.99 USD

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$ 499.99 USD

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Maintain peak battery performance and protect your vehicle's complex electrical architecture with a motorsport-tested, factory-grade charging replacement.

Starter

T#:57267806

Part#: 12418625995

Special Order: No Guaranteed ETA

$ 463.99 USD

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$ 463.99 USD

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Bosch starter units deliver the high-torque cranking performance required to reliably start modern high-compression BMW engines under all thermal conditions.

Hella Negative Battery Cable - F22, F23, F30, F31, F32, F33, F34, F3...

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)

T#:599887

Part#: 13627602038

Special Order: No Guaranteed ETA

$ 151.99 USD

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Qty

$ 151.99 USD

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OEM INA Alternator Pulley - Overrunning Type - E82, E88, E9x, F10, F2...

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.

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