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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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Boost Pressure Sensor
Boost Pressure Sensor
Hella - Corporate Logo
T#:840367
Part#: 13627585493
Ships in 2 Business Days
$ 153.99

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

$ 149.99 USD
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$ 149.99 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 1 Business Day
$ 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.
Intensity Lithium-ION Battery - i34RX - 11.5lbs
Intensity Lithium-ION Battery - i34RX - 11.5lbs
Braille - Corporate Logo
T#:54388454
Part#: I34RX
Ships in 6 Business Days
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$ 949.99 USD
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$ 949.99 USD
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Whether you're building a dedicated track weapon or upgrading your street machine for ultimate reliability, unsprung and upper-chassis weight is the enemy of performance. Positioned high up in the engine bay or rear corners, a heavy factory battery negatively impacts your car's center of gravity.
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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
In Stock
$ 3.99 USD
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$ 3.99 USD
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Hella Crankshaft Position Sensor - E36
Hella Crankshaft Position Sensor - E36
Hella - Corporate Logo
T#:14747
Part#: 12141247259
In Stock at Vendor
$ 89.99

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

$ 85.99 USD
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$ 85.99 USD
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OEM BMW PULSE GENERATOR
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 1 Business Day
$ 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.
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 Parts Air Temperature Sensor - 13621725324
URO Parts Air Temperature Sensor - 13621725324
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:25739332
Part#: 13621725324
Ships in 1 Business Day
$ 13.99 USD
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$ 13.99 USD
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Found on the intake air box or throttle body boot, this sensor relays intake air temperature information to the DME. Commonly referred to as the IAT sensor, this component will cause erratic idle, loss of power and a check engine light upon failure. Prevent these issues with this high-quality replacement from URO parts.

URO Parts offers more than 8,000 high-quality spare parts, many of which are specifically designed to replace factory BMW components. Their business was founded on the premise of producing parts that adhere to the highest standards of precision, materials, and workmanship. Each part is closely evaluated by a team of industry professionals to determine how to offer the best blend of durability, function, and price. If you're looking for quality replacement components at a reasonable price, look no further than URO Parts.

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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

$ 18.57 USD
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$ 18.57 USD
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Brake Switch - 4 Prong
Brake Switch - 4 Prong
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:373217
Part#: 61318360417
Back Ordered
$ 15.52 USD
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$ 15.52 USD
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Located on the brake pedal, this switch is vital to your brake light function. In the event that your vehicle's brake lights are not working and simultaneously showing a "brake light circuit failure", you should replace this part.
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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 1 Business Day
$ 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.
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 1 Business Day
$ 3.99 USD
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$ 3.99 USD
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Used to seal water cooled alternators
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 USD
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$ 1.49 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.
ReFlex Lite Injector Harness - V8
ReFlex Lite Injector Harness - V8
Motiv Motorsports - Corporate Logo
T#:29234314
Part#: 900.1014
Ships in 4 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!
Rein Relay
Rein Relay
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:381382
Part#: 61311378297
Back Ordered
$ 20.99 USD
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$ 20.99 USD
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Replacement relay for the typical white-green and orange relays found in your vehicle
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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Alternator
Alternator
We Price Match - Give Us A Call or Chat!
Valeo - Corporate Logo
T#:594100
Part#: 12317561002
In Stock at Vendor
$ 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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120 pc Fuse Assortment
120 pc Fuse Assortment
Performance Tool - Corporate Logo
T#:1809154
Part#: W5368
Ships in 1-3 days
$ 13.68 USD
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$ 13.68 USD
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A must for any toolbox.
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

$ 949.99 USD
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$ 949.99 USD
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Bosch Knock Sensor - E31, E32, E34, E38
Bosch Knock Sensor - E31, E32, E34, E38
Bosch - Corporate Logo
T#:13073
Part#: 12141702163
In Stock at Vendor
$ 78.99

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

$ 61.99 USD
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$ 61.99 USD
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Bosch BMW PING SENSOR:121060
Oil Level Sensor
Oil Level Sensor
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:37858361
Part#: 12611406609
Ships in 1 Business Day
$ 124.99 USD
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$ 124.99 USD
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Is your oil level light on even though the oil level is fine? The issue may be a faulty oil level sensor, which monitors your engine’s oil level.
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 4 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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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 1 Business Day
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$ 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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Oil Pressure Switch
Oil Pressure Switch
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:373034
Part#: 61311351799
Ships in 1 Business Day
$ 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.
Battery Tender Plus Advanced Battery Charging System
Battery Tender Plus Advanced Battery Charging System
Battery Tender - Corporate Logo
T#:49892371
Part#: BTT0210128
Back Ordered
$ 69.99 USD
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$ 69.99 USD
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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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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 1 Business Day
$ 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.
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 7 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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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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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 3 Business Days
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$ 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.
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 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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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

$ 510.99 USD
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$ 510.99 USD
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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

$ 390.99 USD
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$ 390.99 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.
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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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 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.
BMW Alternator - SEG Automotive 0124.525.588
BMW Alternator - SEG Automotive 0124.525.588
SEG Automotive - Corporate Logo
T#:54851984
Part#: 12317541694
Ships in 2 Business Days
New Item
$ 521.99

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

$ 468.99 USD
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$ 468.99 USD
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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
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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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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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

$ 330.99 USD
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$ 330.99 USD
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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
$ 1,099.99

This product was last offered at the strikethrough price on
08-20-2026

$ 741.09 USD
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$ 741.09 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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MINI Alternator - SEG Automotive 0124.325.157
MINI Alternator - SEG Automotive 0124.325.157
SEG Automotive - Corporate Logo
T#:54851988
Part#: 12317550319
Ships in 2 Business Days
New Item
$ 473.99

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

$ 430.99 USD
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$ 430.99 USD
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Vargas USB To Serial For HPFP Controller - BMW N54
Vargas USB To Serial For HPFP Controller - BMW N54
2X Entries Into Our F80 M3 Sweepstakes
Vargas Turbo Technologies - Corporate Logo
T#:51778112
Part#: N54-USB-SERIAL-H
Ships in 10 Business Days
New Item
$ 37.99 USD
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$ 37.99 USD
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Take full control of your N54’s fueling system with the Vargas Turbo Technologies USB to Serial adapter.
Vargas MAP Sensor Extension Harness - BMW B58, N54, N55, S55, S58, S63
Vargas MAP Sensor Extension Harness - BMW B58, N54, N55, S55, S58, S6...
2X Entries Into Our F80 M3 Sweepstakes
Vargas Turbo Technologies - Corporate Logo
T#:51672717
Part#: VTT-MAP-HARNESS
Ships in 10 Business Days
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$ 59.99 USD
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$ 59.99 USD
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As part of the VTT-FAB fabrication line, this extension harness is designed for builders and tuners who need flexibility.
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

$ 453.99 USD
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$ 453.99 USD
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Temperature Sensor
Temperature Sensor
Bosch - Corporate Logo
T#:29898445
Part#: 13621362599
Ships in 2 Business Days
$ 283.99

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

$ 266.99 USD
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$ 266.99 USD
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Genuine BMW Temperature-Time Switch
Remanufactured Starter Motor
Remanufactured Starter Motor
Bosch - Corporate Logo
T#:596907
Part#: 12417501738
Ships in 2 Business Days
$ 431.15

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

$ 300.49 USD
Free Shipping on orders $49 and up
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$ 300.49 USD
Free Shipping on orders $49 and up
Add to Wish List
If your starter has died and your car will no longer turner over, Bosch's replacement unit is the perfect high quality replacement. OEM replacement for BMW part # 12417501738.
Alternator - 220 Amp
Alternator - 220 Amp
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Valeo - Corporate Logo
T#:639716
Part#: 12317804266
In Stock at Vendor
$ 822.99

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

$ 799.99 USD
Free Shipping
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$ 799.99 USD
Free Shipping
Add to Wish List

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