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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.

This category contains parts that fit the following chassis:

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ReFlex Lite: Advanced Sequential Injector Controller - V8
ReFlex Lite: Advanced Sequential Injector Controller - V8
Motiv Motorsports - Corporate Logo
T#:29234300
Part#: 910.1012
Ships in 5 Business Days
$ 499.00 USD
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$ 499.00 USD
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The ReFlex LITE is a simple yet elegant fueling solution for direct injected vehicles that need to add more fuel by installing a port injection system to keep up with their modifications to the vehicle. Using the same precise form of sequential fuel injection as the ReFlex+, the ReFlex LITE brings a more affordable fuel controller without the additional features of the ReFlex+. Sequential port fuel injection for v-8 engines Firmware and maps are available for multiple vehicles FREE on our website High resolution calibration tables 24x24 cell RPM vs MAP 0-48psi MAP pressure range 250RPM increments up to 8500RPM High resolution datalogging Fault detection status available to monitor in TunerPRO RT Compact in size Universal fitment Simple installation Please Note: The ReFlex LITE does NOT have the ability to analyze and transmit ethanol content to an ECU.
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Alternator - 150 Amp
Alternator - 150 Amp
Bosch - Corporate Logo
T#:591983
Part#: 12317613445
Ships in 2 Business Days
$ 592.99

This product was last offered at the strikethrough price on
08-13-2026

$ 584.99 USD
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$ 584.99 USD
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Flasher/Hazard Light Relay
Flasher/Hazard Light Relay
Wehrle - Corporate Logo
T#:31522987
Part#: 61311371909
In Stock
$ 20.37

This product was last offered at the strikethrough price on
07-15-2026

$ 19.00 USD
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$ 19.00 USD
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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
$ 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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Facet Ping Sensor
Facet Ping Sensor
Facet - Corporate Logo
T#:1195838
Part#: 13627566785
Ships in 2 Business Days
$ 109.99

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

$ 98.99 USD
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$ 98.99 USD
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Sometimes referred to as a knock sensor
15A Fuse - Priced Each
15A Fuse - Priced Each
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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URO Positive Battery Cable
URO Positive Battery Cable
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:42436714
Part#: 61129217036
Ships in 2 Business Days
$ 140.99 USD
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$ 140.99 USD
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If your battery cable is damaged, this is the direct factory replacement you’ll need to restore proper function.
BMW Alternator - SEG Automotive 0121.715.118
BMW Alternator - SEG Automotive 0121.715.118
SEG Automotive - Corporate Logo
T#:54851991
Part#: 12317560985
Ships in 2 Business Days
New Item
$ 1,049.99

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

$ 961.99 USD
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$ 961.99 USD
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ReFlex Lite Injector Harness - V8
ReFlex Lite Injector Harness - V8
Motiv Motorsports - Corporate Logo
T#:29234314
Part#: 900.1014
Ships in 5 Business Days
$ 295.00 USD
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$ 295.00 USD
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Required when installing a Motiv ReFlex Lite to your V8 powered BMW! Includes x8 injector leads and direct, plug-in adapter to the ReFlex Lite Control Unit!
120 pc Fuse Assortment
120 pc Fuse Assortment
Performance Tool - Corporate Logo
T#:1809154
Part#: W5368
In Stock
$ 13.68 USD
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$ 13.68 USD
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A must for any toolbox.
Bushing Contact With Wire Lead - Priced Each
Bushing Contact With Wire Lead - Priced Each
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:14783536
Part#: 61130005199
Back Ordered
$ 3.99 USD
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$ 3.99 USD
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Alternator - 150 Amp AL0888N
Alternator - 150 Amp AL0888N
Bosch - Corporate Logo
T#:591981
Part#: 12317575873
Ships in 2 Business Days
$ 782.99

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

$ 760.99 USD
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$ 760.99 USD
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URO Crankshaft Position Sensor - BMW N63N S63N S63R
URO Crankshaft Position Sensor - BMW N63N S63N S63R
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:43750199
Part#: 13627628741
In Stock
$ 55.99 USD
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$ 55.99 USD
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Crank position sensors report the position of the crankshaft to the ECU/DME to control iginition timing. A bad crank position sensor will commonly cause a no-start situation as faulty readings could lead to engine damage.
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Alternator Pulley - Valeo Alternator only - URO
Alternator Pulley - Valeo Alternator only - URO
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:578905
Part#: 12317516105U
Ships in 2 Business Days
$ 34.99 USD
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$ 34.99 USD
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The solution to a noisy, failing pulley
URO Manifold Air Pressure Sensor - R50, R52, R53
URO Manifold Air Pressure Sensor - R50, R52, R53
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:54388350
Part#: 12140872648
Ships in 2 Business Days
New Item
$ 35.99 USD
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$ 35.99 USD
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This unit serves as an ideal baseline or a crucial component replacement
URO Engine Knock Sensor - BMW M62 S62 N62
URO Engine Knock Sensor - BMW M62 S62 N62
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:43750207
Part#: 13627568421
Ships in 2 Business Days
$ 60.99 USD
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$ 60.99 USD
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This sensor recognizes pinging or knocking within the engine and adjusts timing accordingly to maintain proper engine function.
URO Coolant Level Sensor - E24 E30 E32 E34
URO Coolant Level Sensor - E24 E30 E32 E34
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:593414
Part#: 61311378320
Ships in 2 Business Days
$ 17.99 USD
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$ 17.99 USD
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This sensor is critical in keeping tabs of your cooling system's health.
Genuine BMW Knock Sensor - S54 3.2L
Genuine BMW Knock Sensor - S54 3.2L
Genuine BMW - Corporate Logo
T#:38666
Part#: 12147839167
Ships in 2 Business Days
30% off MSRP $ 87.99

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

$ 61.99 USD
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30% off MSRP
$ 87.99

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

$ 61.99 USD
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Genuine BMW Ping Sensor
This item fits the following BMW Chassis:
E46 M3,E85 Z4M,E46,E85 Z4,E86 Z4

Fits BMW Engines including:
S54

URO Camshaft Position Sensor - E90, E70 - M57
URO Camshaft Position Sensor - E90, E70 - M57
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:55821688
Part#: 13627792256
Ships in 2 Business Days
New Item
$ 17.99 USD
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$ 17.99 USD
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This URO sensor is built to withstand the intense heat cycles of the BMW engine bay, offering a dependable, budget-friendly solution to restore peak engine efficiency. Designed as a direct swap for the factory unit
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Camshaft Position Sensor
Camshaft Position Sensor
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:34348685
Part#: 13627633958
Ships in 2 Business Days
$ 44.99 USD
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$ 44.99 USD
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The URO Camshaft Position Sensor is an essential component for BMW engines, providing precise data on camshaft position to ensure accurate fuel injection timing and peak engine performance. Designed to meet OEM specifications, this sensor helps optimize ignition timing, contributing to smoother acceleration, enhanced fuel economy, and overall engine efficiency. Available from Turner Motorsport, the URO Camshaft Position Sensor is the ideal replacement part for BMW owners aiming to maintain optimal performance and reliability.

  • Ensures accurate timing for smooth acceleration and responsive power
  • Optimizes fuel injection timing, improving fuel efficiency
  • Built to OEM standards for precise fit and easy installation in BMW models
  • Supports reliable ignition timing for dependable engine operation
  • Durable construction withstands high engine temperatures for lasting performance
  • Available from Turner Motorsport, a trusted source for BMW replacement parts

The URO Camshaft Position Sensor is a cost-effective solution for BMW owners looking to keep their engine running smoothly and efficiently, delivering the performance and dependability they expect.

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Genuine BMW Gasket - 12317507807 - E63,E65
Genuine BMW Gasket - 12317507807 - E63,E65
Genuine BMW - Corporate Logo
T#:38956
Part#: 12317507807
Ships in 1-2 days
$ 6.99

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

$ 4.99 USD
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$ 4.99 USD
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Genuine BMW Gasket -
This item fits the following BMW Chassis:
E63,E65

Fits BMW Engines including:
N62,N62N

Hella 5-Prong Fuel Injection Relay - E21, E23, E24, E28, E30, E34
Hella 5-Prong Fuel Injection Relay - E21, E23, E24, E28, E30, E34 ...
Hella - Corporate Logo
T#:7175
Part#: 12631708646
Ships in 2 Business Days
$ 21.99

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

$ 19.99 USD
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$ 19.99 USD
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This part has been superseded to BMW Part 12631708647
URO Premium Upgraded Alternator Gasket - E63,E65
URO Premium Upgraded Alternator Gasket - E63,E65
2X Entries Into Our F80 M3 Sweepstakes
URO Premium - Corporate Logo
T#:587670
Part#: 12317507807
Ships in 2 Business Days
$ 3.99 USD
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$ 3.99 USD
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Used to seal water cooled alternators
MINI R50+ Starter - New - TYC
MINI R50+ Starter - New - TYC
TYC - Corporate Logo
T#:581893
Part#: 117854
In Stock at Vendor
$ 119.99

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

$ 116.99 USD
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$ 116.99 USD
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For reliable starting performance in your Mini R50+, consider the MINI R50+ Starter - New - TYC. This high-quality starter from TYC offers durability and efficiency, ensuring your Mini starts reliably every time. With its new construction, it provides peace of mind and hassle-free operation for your vehicle.

  • Ensures reliable starting performance for Mini R50+
  • High-quality construction for durability
  • Efficient operation for consistent starting
  • New starter for peace of mind

Upgrade your Mini's starting system with the MINI R50+ Starter - New - TYC and enjoy reliable performance on every drive.

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Valeo Alternator - E53
Valeo Alternator - E53
We Price Match - Give Us A Call or Chat!
Valeo - Corporate Logo
T#:377182
Part#: 12317540994
In Stock
$ 384.99 USD
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$ 384.99 USD
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Restore charging system voltage with a new alternator
Oil Level Sensor
Oil Level Sensor
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:8246791
Part#: 12617501786
Back Ordered
$ 59.99 USD
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$ 59.99 USD
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Replace your faulty sensor when the oil level light is on, but oils are at correct levels. Direct-fit OE replacement design restores factory oil level sensor function Easy plug-and-play connection Includes gasket
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Battery Tender Plus Advanced Battery Charging System
Battery Tender Plus Advanced Battery Charging System
Battery Tender - Corporate Logo
T#:49892371
Part#: BTT0210128
In Stock at Vendor
$ 69.99 USD
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$ 69.99 USD
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Alternator
Alternator
We Price Match - Give Us A Call or Chat!
Valeo - Corporate Logo
T#:594100
Part#: 12317561002
Ships in 2 Business Days
$ 794.99

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

$ 771.99 USD
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$ 771.99 USD
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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.
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ReFlex+ Plug-N-Play Harness Kit - Visconti Tuning
ReFlex+ Plug-N-Play Harness Kit - Visconti Tuning
Motiv Motorsports - Corporate Logo
T#:29201087
Part#: 200.1103
Ships in 5 Business Days
$ 615.00 USD
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$ 615.00 USD
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Visconti Tuning teamed up with MOTIV as the first company to bring a plug-and-play harness to the community. After years of success and some of the fastest Supras and BMWs in the world using the harness, Visconti Tuning has improved upon an already fantastic offering.
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Alternator Bracket Bushing - Priced Each
Alternator Bracket Bushing - Priced Each
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:592985
Part#: 12311715491
Ships in 2 Business Days
$ 2.99 USD
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$ 2.99 USD
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Rubber bushing, placed in the top portion of the alternator support bracket. Each vehicle requires two.
Crankshaft Sensor O-Ring (18 X 1.2 Mm)
Crankshaft Sensor O-Ring (18 X 1.2 Mm)
Victor Reinz - Corporate Logo
T#:13233505
Part#: 12141402705
Ships in 2 Business Days
$ 1.49

This product was last offered at the strikethrough price on
08-26-2026

$ 1.30 USD
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$ 1.30 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.
Oil Pressure Switch
Oil Pressure Switch
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:373034
Part#: 61311351799
Ships in 2 Business Days
$ 2.99 USD
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$ 2.99 USD
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Make sure your vehicle is reading its oil pressure correctly with a new oil pressure switch.
AUTOTECKNIC Dry Carbon Fiber Battery Terminal Cover - G87 M2
AUTOTECKNIC Dry Carbon Fiber Battery Terminal Cover - G87 M2 ...
AUTOTECKNIC - Corporate Logo
T#:21012623
Part#: ATK-BM-0420-G87
Ships in 8 Business Days
$ 495.00 USD
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$ 495.00 USD
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The boldly styled G87 already touts carbon features but carbon fiber is not very often displayed in the engine bay. If you are looking to give your engine bay some carbon spark, AUTOTECKNIC introduces you to their dry carbon battery terminal cover to beautify your engine bay and bring a smile to your face every time you open the hood of your S58 monster! Made from high-quality carbon, this product is sure to stand the test of time!
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OEM Bosch Starter Relay - E21 320i
OEM Bosch Starter Relay - E21 320i
Bosch - Corporate Logo
T#:583822
Part#: 61311243207
In Stock at Vendor
$ 4.99 USD
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$ 4.99 USD
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This is a brand new starter relay from OEM supplier Bosch. If you have replaced your starter and have ruled out every other issue, this relay could restore your starters operation and get your car back up and running.
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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 7 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 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 7 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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Walker MAP Sensor - BMW N20 N26 S55 S63
Walker MAP Sensor - BMW N20 N26 S55 S63
Walker - Corporate Logo
T#:39059258
Part#: 13627843531
Ships in 2 Business Days
$ 139.99

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

$ 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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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 7 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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MINI Alternator - SEG Automotive 0125.711.078
MINI Alternator - SEG Automotive 0125.711.078
SEG Automotive - Corporate Logo
T#:54851993
Part#: 12317613445
Ships in 2 Business Days
New Item
$ 564.99

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

$ 521.99 USD
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$ 521.99 USD
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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 7 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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BMW Starter - SEG Automotive 0001.108.460
BMW Starter - SEG Automotive 0001.108.460
SEG Automotive - Corporate Logo
T#:55857741
Part#: 12417610344
Ships in 2 Business Days
New Item
$ 368.99

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

$ 337.99 USD
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$ 337.99 USD
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Mishimoto Ignition Coil - Single - BMW M54, N20, N52, N54, N55, N62, S54, S62
Mishimoto Ignition Coil - Single - BMW M54, N20, N52, N54, N55, N62, ...
Mishimoto - Corporate Logo
T#:51075090
Part#: MMIG-BMW-02
Ships in 4 Business Days
$ 72.99 USD
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$ 72.99 USD
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The Mishimoto BMW Ignition Coil is built to handle the intense heat cycles found in BMW’s modern turbocharged and naturally aspirated engines.
OEM Bosch Remanufactured Alternator - 180 Amp - E70 X5 3.0si N52 3.0L
OEM Bosch Remanufactured Alternator - 180 Amp - E70 X5 3.0si N52 3.0L...
Bosch - Corporate Logo
T#:638550
Part#: 12317560986-14KT
Ships in 2 Business Days
$ 1,145.05 USD
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$ 1,145.05 USD
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Replace your dead alternator with this remanufactured unit and make sure your battery is being charged properly. When doing any sort of repair or maintenance there is no replacement for original parts. Turner Motorsport carries the OEM Bosch brand with pride and has the parts you need to complete your next project with confidence. Includes a $75.00 core charge to be refunded after we receive your refundable core.
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Battery Cable - With Pole
Battery Cable - With Pole
Bapmic - Corporate Logo
T#:54388517
Part#: 61129259425
Ships in 2 Business Days
New Item
$ 126.99 USD
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$ 126.99 USD
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On the track or on the street, your BMW’s electrical architecture demands absolute consistency. A degraded positive battery cable introduces unwanted resistance, leading to weak starts, alternator strain, and erratic module behavior. When it’s time to replace a compromised factory cable, you don’t need over-hyped marketing—you need a part that fits precisely and restores factory grid integrity.
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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 3 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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BMW Alternator - SEG Automotive 0124.515.223
BMW Alternator - SEG Automotive 0124.515.223
SEG Automotive - Corporate Logo
T#:54851980
Part#: 12317519618
Ships in 2 Business Days
New Item
$ 503.99

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

$ 462.99 USD
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$ 462.99 USD
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Eccentric Shaft Sensor Seal
Eccentric Shaft Sensor Seal
Meistersatz - Corporate Logo
T#:57580051
Part#: 11127559699
Ships in 4 Business Days
New Item
$ 18.99 USD
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$ 18.99 USD
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Maintain peak driving dynamics and uncompromised chassis precision with this original-spec replacement from Meistersatz.
Hitachi Crankshaft Sensor - BMW B46 B48 B58
Hitachi Crankshaft Sensor - BMW B46 B48 B58
Hitachi - Corporate Logo
T#:48850081
Part#: 13627806782
Ships in 7 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.
Temperature Sensor
Temperature Sensor
Bosch - Corporate Logo
T#:29898445
Part#: 13621362599
Ships in 2 Business Days
$ 274.99

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

$ 263.99 USD
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$ 263.99 USD
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Genuine BMW Temperature-Time Switch
Denso Starter Motor - BMW N55 S55 3.0L
Denso Starter Motor - BMW N55 S55 3.0L
Denso - Corporate Logo
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
Free Shipping on orders $49 and up
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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.

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