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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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Genuine BMW Positive Battery Cable - E21 320i
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Genuine BMW - Corporate Logo
T#:39337
Part#: 12421732447
In Stock
Sale - Save 6% $ 69.99

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

$ 65.88 USD
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$ 69.99

This product was last offered at the strikethrough price on
06-15-2026

$ 65.88 USD
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Genuine BMW BATTERY CABLE (PLUS POLE)
Eccentric Shaft Sensor Kit
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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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Genuine BMW Repair wiring harness - E61
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Genuine BMW - Corporate Logo
T#:137412
Part#: 61119231821
In Stock
Sale - Save 5% $ 176.99

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

$ 167.52 USD
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$ 176.99

This product was last offered at the strikethrough price on
06-25-2026

$ 167.52 USD
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Genuine BMW REP. WIRING HARNESS, HINGE O

Genuine BMW Coolant Temperature Sensor
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Genuine BMW - Corporate Logo
T#:212350
Part#: 13627823993
In Stock
9% off MSRP $ 55.99

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

$ 50.99 USD
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9% off MSRP
$ 55.99

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

$ 50.99 USD
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Part of the EGR cooling system in N47/N57 equipped vehicles. Located in the coolant line near the aux water pump.

Genuine BMW Earth Strap - 18106906784 - E53,E71,E83
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Genuine BMW - Corporate Logo
T#:47274
Part#: 18106906784
In Stock
Sale - Save 7% $ 29.99

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

$ 28.01 USD
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Sale - Save 7%
$ 29.99

This product was last offered at the strikethrough price on
06-25-2026

$ 28.01 USD
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Genuine BMW Earth Strap -
This item fits the following BMW Chassis:
E53 X5,E71,E83 X3

Fits BMW Engines including:
M54,M62,N52N,N54,S62

Ambient (Outside) Temperature Sensor
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URO - Corporate Logo
T#:376060
Part#: 65811383204
In Stock
$ 32.99 USD
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$ 32.99 USD
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If your old, original sensor has failed, you will not get a correct temperature reading. Replace it and restore function to your BMW.

OEM Hella Oil Level Sensor -- E84 X1, Z4 28i
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Hella - Corporate Logo
T#:384437
Part#: 12617501786
In Stock
$ 103.99

This product was last offered at the strikethrough price on
03-31-2026

$ 88.99 USD
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$ 103.99

This product was last offered at the strikethrough price on
03-31-2026

$ 88.99 USD
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Ensure your vehicle is getting a correct oil level reading with a high quality OEM Hella replacement. Replaces genuine part # 12617501786.

Hella is a premium manufacturer that supplies automotive parts to numerous car brands across the world. Everything from electrical to mechanical genuine parts have been made and supplied directly to BMW before the vehicles ever leave the production floor. Their high quality, long lasting parts have made them a trusted brand chosen to help keep your BMW on the road for many years to come.

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!

For E84 28i/ix and E89 Z4 28i BMW's with the N20 motor.

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OEM Bosch Remanufactured Alternator - 140 amp -- E32 735i/iL E34 530i...
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Bosch - Corporate Logo
T#:224664
Part#: AL148X
In Stock
$ 322.99

This product was last offered at the strikethrough price on
01-12-2026

$ 302.99 USD
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$ 302.99 USD
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If your car has died on the side of the road from a dead battery and you notice flickering or low powered head lights, it's likely your alternator failing. To be sure you are getting a high quality part with a long life-span, choose this OEM Bosch Alternator. OEM replacement from BMW part number 12311466088 and 12311735706

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!

A $65.00 refundable core charge is included with this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge. 

This Bosch Alternator fits the following BMWs:
1989-1993 E34 BMW 535i
1988-1992 E32 BMW 735i 735il

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Precision Raceworks Ethanol Sensor Breakout Harness
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Precision Raceworks - Corporate Logo
T#:35559424
Part#: 201-0411
Ships in 6 Business Days
$ 35.99

This product was last offered at the strikethrough price on
01-22-2026

$ 34.99 USD
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$ 34.99 USD
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n Ethanol Sensor Breakout Harness provides a clean wiring solution by splitting the signal from your ethanol content sensor between two analyzers, such as an ECU/controller and a gauge or Bluetooth display, without modifying your existing harness.his setup enables real-time ethanol level monitoring and facilitates comprehensive DME/ECU adjustments for enhanced automotive performance.citeturn0search0
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BMW E46 E39 E53 Z3 OEM Bosch Alternator - 120amp
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Bosch - Corporate Logo
T#:373543
Part#: 12317501599
In Stock at Vendor
$ 526.99

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

$ 511.99 USD
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$ 511.99 USD
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If you car has died on the side of the road from a dead battery and you notice flickering or low powered head lights, it's likely your alternator failing. To be sure you are getting a high quality part with a long life-span, choose this OEM Bosch Alternator. This is an OEM replacement for BMW part # 12317501599.

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 Alternator - 80 Amp - E34, E36
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Valeo - Corporate Logo
T#:377737
Part#: 12311744564
In Stock at Vendor
$ 549.99

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

$ 533.99 USD
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$ 533.99 USD
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Brand new unit with no core charge
Burger Motorsports 2007-2012 TypeA 4BAR Adapter - E82/88 E9X E6X N54 ...
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Burger Motorsports - Corporate Logo
T#:599636
Part#: TYPEA4BARADAPTER
Ships in 2 Business Days
$ 35.00 USD
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Use these plug and play adapters to quickly adapt a 4bar TMAP sensor to your N54/N55/S55 BMW, raising the boost maximum boost range from 20psi factory up to 43psi. For very high boost applications, this 4 BAR adapter can be used which requires Bosch 4 BAR sensor (Part # 281002576). SENSOR NOT INCLUDED, Please see T#587716
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Endurance Series AGM Battery - B48-H6-L3
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Braille - Corporate Logo
T#:36947237
Part#: B48-H6-L3
In Stock
$ 398.99 USD
$ 398.99 USD
Camshaft Sensor
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Bremi - Corporate Logo
T#:590416
Part#: 12141485845
In Stock at Vendor
$ 45.98 USD
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Braille Performance GreenLite Lithium-ION Battery - G30 - 5.5lbs ...
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Braille - Corporate Logo
T#:558046
Part#: G30
Ships in 7 Business Days
$ 522.99 USD
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The G30 lithium battery from Braille is designed for the Import Tuner market (4 and 6 cylinder) for track use and has enough power for small black V8 race cars and hot rods with light electrical demands/accessories and standard compression. The G30 comes in the popular ETX 30 Group size, just like the B3121 AGM, so it is small and light enough to mount in a variety of locations. Incorporated in this battery is the same technology used in their race winning batteries used by nearly every OEM developer in classes ranging from SCCA to Formula 1.
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Bremi Crankshaft Sensor - 13627806782
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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

$ 69.99 USD
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$ 69.99 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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OEM Bosch Remanufactured Alternator - AL9454X - BMW E9X M3 S65 ...
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Bosch - Corporate Logo
T#:639734
Part#: 12317837981BKT
In Stock at Vendor
$ 526.99

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

$ 513.99 USD
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$ 513.99 USD
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*Price includes a refundable $75 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: AL9454X, 0986UR6290 Replaces the following BMW part numbers: 12317837981, 12317838656
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Race German Fuse Replacement Kit
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Race German - Corporate Logo
T#:2602226
Part#: E36FUSEKIT
Ships in 1-2 days
$ 41.99 USD
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Complete set of fuses from OE BMW supplier for direct replacement of blown or mismatched fuses. Kit includes A complete set of new OEM fuses Extra fuses Fuse puller

OEM Bosch Remanufactured 180 Amp Alternator - E82/88 E9X E60/61 N54 ...
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Bosch - Corporate Logo
T#:373812
Part#: 12317558220KT1
Ships in 1 Business Day
$ 1,029.99

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

$ 966.99 USD
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$ 966.99 USD
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Replace your dead alternator with this new unit and make sure your battery is being charged properly. 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 exacting assembly process and high level of durability you can expect a long service life from all Bosch products. Includes a $195.00 core charge to be refunded after we receive your refundable core.
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Continental Knock Sensor - N52
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Continental - Corporate Logo
T#:580193
Part#: A2C59517063
In Stock at Vendor
$ 151.51 USD
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$ 151.51 USD
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Genuine BMW Ping Sensor -
This item fits the following BMW Chassis:
E70 X5,E82,E83 X3,E85,E86,E89 Z4,E90,E92,E93,F10,F25 X3

Fits BMW Engines including:
N51,N52,N52N

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OEM Schaeffler Alternator Bearing - BMW E21 E30 E36 E12 E28 E34 E23 E...
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Schaeffler - Corporate Logo
T#:41965072
Part#: 6201-Z
Ships in 7 Business Days
$ 32.99 USD
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Offered by OEM Schaeffler, this bearing replaces BMW part number 12311739203, which is found in numerous BMW alternators manufactured prior to 1996. This bearing helps to stabilize the shaft of the alternator, allowing it to spin freely. If you are experiencing a loud squeaking or grinding noise from your alternator, there is a good chance one of the internal bearings has failed and needs to be replaced.
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AAF Oil Pressure Sensor Relocate Kit - M20
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Advanced Auto Fabrication - Corporate Logo
T#:7593105
Part#: 116177
Ships in 3 Business Days
$ 69.99 USD
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Since 2010, Advanced Auto Fabrication has been producing and developing both parts and full fledged race cars. Their knowledge base covers a wide range of vehicles both domestic and imported. In the specific case of BMW, the team at AAF has a particular affinity for building and designing components for BMW race cars. AAF's Oil Pressure Sensor Relocation Kit allows for an aftermarket low pressure switch as well as oil pressure sensor, or two 1/8' NPT pressure sensors to be installed. This can allow a gauge or light to be on the dash and still log oil pressure in a data logger. This kit also moves the oil pressure sensor away from the engine and onto the chassis (or any other spot) where is it much easier to access, or install larger size diameter sensors. Fits all M20 Engines. Features: 4AN Stainless Steel Braided Line Banjo Bolt and Fitting (installs onto block) 3 Way 1/8' NPT Tee Fitting, for hose from block and 2 sensors. Note: This kit does not come with sensors – the factory low pressure switch can NOT be used. An aftermarket 1/8″ NPT low pressure switch can be used with the factory wire.
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Valeo Brand New Alternator - E89 Z4 M Coupe/Roadster
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Valeo - Corporate Logo
T#:379218
Part#: 12317837691KT
Ships in 5 Business Days
$ 378.99 USD
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$ 378.99 USD
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This is a brand new Valeo alternator. BMW Alternators are built especially for extremes of heat, cold and high demand. Your BMW deserves nothing less than the best, which is why an OEM Valeo alternator is the best option. BMW alternators are built to last using the highest quality materials and the most technologically advanced processes. All alternator parts are 100% factory tested to assure that they meet or exceed original equipment specifications. And every alternator is fully load tested to guarantee compliance with BMW's strict performance specifications. 

No core charge!

Fits the following BMW Chassis:

E89 BMW Z4 M Coupe, M Roadster

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Crankshaft Position Sensor
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Bremi - Corporate Logo
T#:2027109
Part#: 13627639278
Ships in 1 Business Day
$ 45.99

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

$ 44.99 USD
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$ 44.99 USD
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OEM VDO Mass Air Sensor -- N52 BMW
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Continental - Corporate Logo
T#:14962
Part#: 13627551638
In Stock
$ 267.12

This product was last offered at the strikethrough price on
05-11-2026

$ 265.53 USD
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$ 265.53 USD
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This is a high quality replacement OEM VDO Mass Air Sensor.The MAF controls the amount of fuel that goes through the injectors based on the volume of air coming through the intake. If your vehicle is giving you a MAF 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 completely, the vehicle will stutter and stall as it falls into a limp mode. One way to check if your MAF is bad is to unplug the connector before starting your car. If it idles well (compared to a previous poor idle), your MAF needs 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.

OEM replacement for BMW part # 13627551638.

OEM VDO is one of the largest OE providers in the world, supplying numerous vehicle brands, including BMW, with many of their genuine parts that build the vehicle before they ever reach the car lot. Entrusted by many of the top names in automotives and with their proven history of reliability, it makes all of us here at Turner confident that their line of OEM replacement parts are a perfect option to restore your vehicles original operation and performance. The same great quality or higher than Genuine BMW parts at a lower cost.

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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Bosch Starter Motor - E30 325e 325es E28 528e E21 323i
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Bosch - Corporate Logo
T#:2278
Part#: SR43X
In Stock at Vendor
$ 324.99

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

$ 252.99 USD
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$ 252.99 USD
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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 exacting assembly process and high level of durability you can expect a long service life from all Bosch products.​

This genuine Bosch Starter fits the following BMWs:
1984-1985 E30 3 Series 323i 325e 325es
1982-12/1986 E28 5 Series 528e
1977-1983E21 3 Series 320/6 323i

 

Includes $45.00 core charge to be refunded on return of your rebuildable core.

 

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OEM Valeo Alternator - 185 amp
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Valeo - Corporate Logo
T#:376244
Part#: 12317525376
Ships in 1 Business Day
$ 727.66 USD
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$ 727.66 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.

This is a NEW alternator from the OEM manufacturer, Valeo. No core charge applies. Valeo is an OEM manufacturer for many BMW alternators - save money by buying the same alternator in a different box!

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Crankshaft Position Sensor - E34 535i E32 735i 735il
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Facet - Corporate Logo
T#:1119
Part#: 12141720853
In Stock at Vendor
$ 63.99 USD
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This crank shaft position sensor provides the ECU with the engine speed signal. It fits BMW E34 535i 1989-1991 E32 735i 735il 1988-1993 with M30 engine

Facet produces all of the goods they sell to be the best they can be in their market, while still remaining customer and environmentally focused. Since 1946 this company has delivered high-quality replacement auto parts by starting with extremely high quality raw materials and employing the most up to date automated manufacturing processes.

This item fits the following BMWs:
1989-1993 E34 BMW 535i
6/1987-1989 E24 BMW 633csi 635csi M6
1988-1993 E32 BMW 735i 735il
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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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Genuine BMW Camshaft Position Sensor - E36 318is 318ti 318i, Z3 1.9 ...
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Genuine BMW - Corporate Logo
T#:367792
Part#: 12141743072
In Stock at Vendor
$ 539.99

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

$ 435.99 USD
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$ 435.99 USD
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Facet Crankshaft Position Sensor - E36
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Facet - Corporate Logo
T#:378157
Part#: 12141247259
Ships in 2 Business Days
$ 70.00

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

$ 68.00 USD
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$ 68.00 USD
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Having a crank but no starting issue? This sensor is often the culprit
Hella Crankshaft Position Sensor - E28, E30, E34
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Hella - Corporate Logo
T#:591862
Part#: 12141720852
In Stock at Vendor
$ 118.99

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

$ 114.99 USD
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$ 114.99 USD
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Having a crank but no starting issue? This sensor is often the culprit

Camshaft Position Sensor
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URO - Corporate Logo
T#:384156
Part#: 12141742185
Ships in 1 Business Day
$ 36.99 USD
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When this sensor fails, it will become impossible to start your car, leaving you stranded.

Hella Air Horn Kit
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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!
ReFlex Lite Injector Harness - Inline-4
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Motiv Motorsports - Corporate Logo
T#:29234303
Part#: 900.1012
Ships in 4 Business Days
$ 140.00 USD
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Required when installing a Motiv ReFlex Lite to your inline-4 powered BMW! Includes x4 injector leads and direct, plug-in adapter to the ReFlex Lite Control Unit!
Facet Engine Crankshaft Position Sensor - E31, E32
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Facet - Corporate Logo
T#:591363
Part#: 12141720291
In Stock at Vendor
$ 75.99

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

$ 71.99 USD
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$ 71.99 USD
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Measures the speed and position of your engine's crankshaft.


Bosch Starter Motor - E32 750il E38 750il E31 850i 850ci
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Bosch - Corporate Logo
T#:1175
Part#: SR444X
In Stock at Vendor
Sale - Save 5% $ 279.99

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

$ 265.75 USD
Sale - Save 5%
$ 279.99

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

$ 265.75 USD

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 exacting assembly process and high level of durability you can expect a long service life from all Bosch products.

This genuine Bosch Starter fits the following BMWs:
1988-1991 E32 7 Series 750il
1995-2001 E38 7 Series 750il
1991-1998 E31 8 Series 850i 850ci

 

Includes $75.00 core charge to be refunded on return of your rebuildable core.

 

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ReFlex Lite Injector Harness - Inline-6
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Motiv Motorsports - Corporate Logo
T#:29234311
Part#: 900.1013
Ships in 4 Business Days
$ 155.00 USD
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Required when installing a Motiv ReFlex Lite to your inline-6 powered BMW! Includes x6 injector leads and direct, plug-in adapter to the ReFlex Lite Control Unit!
Oxygen Sensor - Front Position
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Bosch - Corporate Logo
T#:591947
Part#: 11788600992
In Stock at Vendor
$ 173.99

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

$ 169.99 USD
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$ 169.99 USD
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Ensure optimal engine performance in your Mini with this Bosch oxygen sensor. Designed to replace a malfunctioning sensor, this unit measures the amount of unburned fuel in the exhaust pipe, allowing for adjustments to fuel mapping for reduced emissions and improved fuel economy.

  • Restores engine performance and mileage
  • Easy installation for quick restoration of vehicle performance
  • Prevents sensor seizing with anti-seize application
  • Regular maintenance helps prevent gradual sensor failure
  • OEM supplier Bosch ensures quality and compatibility with Mini vehicles

Upgrade your Mini's engine efficiency and reduce emissions with this high-quality Bosch oxygen sensor.

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Motiv ReFlex+
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Motiv Motorsports - Corporate Logo
T#:29101668
Part#: 910.1001
Ships in 4 Business Days
$ 849.00 USD
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The MOTIV ReFlex+ is an Advanced I/O Integration module allowing a level of precise control of auxiliary components. In addition, the ReFlex can incorporate external data into the factory DME/ECU in parallel through optional CANbus integration. Utilizing the CANbus option, multiple digital and analog signals can be used by the DME/ECU for safety, data logging, or adaptive tuning features. It is unique in its ability to function as a separate standalone, as well as a parallel module in conjunction with the DME/ECU. The ReFlex provides the most accurate and precise supplementary sequential fuel injection with the ability to control other advanced features all in one place. It brings a new level of control, function, and versatility to tuning any modern-day vehicle. Preset crank and cam trigger for most modern-day BMW engines, as well as fully configurable triggers to be synched on any vehicle application. Configurable to operate on 4, 5, 6, and 8-cylinder engines. 3 Point MAP sensor calibration table makes it configurable for almost any MAP or TMAP sensor. Sequential Port Injection with the ability to sense individual injector failures on 4 to 8-cylinder engines. Built-in Ethanol Content Analyzer. The Re|Flex firmware and XDFs include ethanol compensation tables to scale properly for varying ethanol % based on real-time input from the sensor. 2x Additional Outputs. These outputs have 12x12 resolution tables for control in TunerPro R/T. These can be configured to run as on/off, digital, frequency (25hz), or PID. Boost Control WGDC Methanol Solenoid Control PWM (for use with valves such as the Aquamist FAV and the ProMeth Pulse Valve) Nitrous Solenoid Control PWM Auxiliary fuel pump relay trigger 2x Inputs Ethanol Content Sensor Fuel Pressure Sensor (0-10bar) Oil Pressure (0-10bar) Coolant Pressure (0-10bar) EGBP/EMAP (0-10bar) CANbus (not required) enabled communication for the transmission and receiving of digital signals for fully DME/ECU integrated control of external modifications. The CANbus communications also allow for data and errors to be transmitted to and from the vehicle's engine control computer in order to add safeguards and implement engine trips and fail safes. Logging via OBDII is still fully functional and is not affected at all by the communication with the Re|Flex. Some of the developments underway include: Error reporting to and from factory ECU for unparalleled safety Output WGDC by converting an EWG signal to a more conventional DC output for controlling standard 3port and 4port boost solenoids for use with external WG’s The ability to datalog non-factory parameters such as ethanol content, additional pressure sensor, PI IDC, and more! These features make the Re|Flex the most powerful and safest supplementary and auxiliary controller on the market. However, this is only the beginning. As flash platforms find the need for more accessories to control, the Re|Flex was designed to be updated easily by the end user in order to add functionality as it is developed.
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Mass Air Flow Sensor
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Bremi - Corporate Logo
T#:47644906
Part#: 13627593624
In Stock at Vendor
$ 193.99

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

$ 188.99 USD
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$ 188.99 USD
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Hitachi Voltage Regulator - BMW E31 E32 E34 E36
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Hitachi - Corporate Logo
T#:48850064
Part#: 12311747920
Ships in 6 Business Days
New Item
$ 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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Bosch Remanufactured Starter Motor - BMW N55 S55 3.0L
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Bosch - Corporate Logo
T#:40004862
Part#: SR9521XKT
In Stock at Vendor
$ 465.99

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

$ 454.99 USD
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$ 454.99 USD
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The advertised price includes a refundable $78 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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Facet Intake Air Temperature Sensor - BMW E9X M3 S65
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Facet - Corporate Logo
T#:43885733
Part#: 13627792203
In Stock at Vendor
$ 28.99

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

$ 27.99 USD
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$ 27.99 USD
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This sensor provides your BMW's control unit with intake temperature readings, enabling it to run optimally in any condition. If this sensor has failed, your BMW may be suffering from more performance loss than you realize. Replace your IAT sensor to ensure proper temperature readings and restore lost performance!
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Facet MAP Sensor - BMW N20 N26 S55 S63
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Facet - Corporate Logo
T#:39059259
Part#: 13627843531
In Stock at Vendor
$ 118.99

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

$ 114.99 USD
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$ 114.99 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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Alternator
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Valeo - Corporate Logo
T#:594101
Part#: 12318570672
In Stock at Vendor
$ 1,094.99

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

$ 1,062.99 USD
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$ 1,062.99 USD
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Replacement Alternator from Valeo
AAF Jump Post Relocation Bracket - E46
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Advanced Auto Fabrication - Corporate Logo
T#:7608844
Part#: 11648
Ships in 3 Business Days
$ 28.99 USD
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Since 2010, Advanced Auto Fabrication has been producing and developing both parts and full fledged race cars. Their knowledge base covers a wide range of vehicles both domestic and imported. In the specific case of BMW, the team at AAF has a particular affinity for building and designing components for BMW race cars. The AAF E46 Jump Post Relocation Bracket makes it easy to adjust camber/caster on your race car by getting the factory jump post out of the way! In race car applications, the desired camber and caster settings can cause the strut tops and shock adjusters to interfere with the factory jump post. This kit takes just a few minutes to install and makes using strut braces and adjusting camber plates just that much safer and faster.
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BMW B58 3.0L Oxygen Sensor - Downstream
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Walker - Corporate Logo
T#:5229442
Part#: 11788611294
Ships in 2 Business Days
$ 159.99

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

$ 138.99 USD
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$ 138.99 USD
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BMW B58 3.0L Oxygen Sensor - Downstream is essential for maintaining optimal engine performance and fuel efficiency. Turner Motorsport offers this high-quality replacement sensor designed to precisely measure exhaust oxygen levels, allowing the vehicle's computer to accurately adjust the air/fuel ratio and monitor emissions. A degraded oxygen sensor can lead to decreased engine performance, reduced fuel efficiency, and increased harmful emissions, potentially triggering the Check Engine Light and causing a failure in emissions testing.

  • Ensures Optimal Engine Performance: Accurately measures exhaust oxygen levels for precise air/fuel ratio adjustments.
  • Improves Fuel Efficiency: Helps maintain proper fuel mixture, reducing fuel consumption.
  • Reduces Harmful Emissions: Keeps emissions in check, ensuring compliance with environmental standards.
  • Prevents Check Engine Light Activation: Helps avoid unnecessary warning lights and potential emissions test failures.
  • Quality Replacement: High-grade sensor designed specifically for the BMW B58 3.0L engine.
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Genuine BMW Temperature Sensor
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Genuine BMW - Corporate Logo
T#:200307
Part#: 13621362599
Ships in 2 Business Days
6% off MSRP $ 255.99

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

$ 239.99 USD
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6% off MSRP
$ 255.99

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

$ 239.99 USD
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Genuine BMW Temperature-Time Switch
Genuine BMW Adapter Lead
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Genuine BMW - Corporate Logo
T#:14857
Part#: 12514592703
In Stock
4% off MSRP $ 113.99

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

$ 109.99 USD
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4% off MSRP
$ 113.99

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

$ 109.99 USD
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Genuine BMW Adapter Lead -
This item fits the following BMW Chassis:
E36,E39,E46

Fits BMW Engines including:
M52,S52