BMW Electrical Sensors, Switches, & Relays for BMW X Series E84 (2013-2015)

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Electrical gremlins can be very frustrating. Luckily your BMW's electrical system is better than most, even if it's 25 years old. Here you will find electrical relays, sensors, switches, and modules for the engine, camshaft, and crankshaft. Our parts are OEM, Genuine BMW, or approved aftermarket brands that we have an excellent track record with. There is no middle ground with electrical parts - it either works perfectly or not. And there's nothing more frustrating than a new part that fails right out of the box. So it's important to choose quality replacement parts over a cheap but faulty piece.

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ECS - Corporate Logo
T#:48367010
Part#: 059226LA01
In Stock
Sale - Save 3% $ 30.99

This product was last offered at the strikethrough price on
06-14-2026

$ 29.99 USD
Free Shipping
Sale - Save 3%
$ 30.99

This product was last offered at the strikethrough price on
06-14-2026

$ 29.99 USD
Free Shipping

If you're experiencing hard starting, flaky charging, or other electrical issues, your engine ground strap may be the culprit. On E9X BMWs, the engine ground strap is a thin, non-insulated cable that spans from the left engine mount arm to the frame horn. Despite the seemingly simple nature of this part, on older cars, it is known to cause massive headaches. Due to its non-insulated design, years of exposure to water, dirt, and road salt will cause the wire to corrode, ultimately leading to complete failure. A break in this cable will cause an open circuit, resulting in issues with the vehicle's electrical system and potentially leading to a no-start condition.

To solve this issue, ECS has engineered an exact-fit, upgraded ground strap for your E9X BMW! Unlike its OEM counterpart, this design features insulated, large-gauge copper wire for dependable conductivity and long-lasting durability. Additionally, factory-style lugs are zinc-coated, crimped, and soldered, ensuring protection against corrosion and oxidation.

Whether you're replacing a visibly corroded strap or proactively preventing failure, this solution from ECS is sure to provide lasting performance and protection.

FEATURES

Direct-fit replacement and upgrade for RWD E82/E88, E84, and E9X applications Solves intermittent grounding issues caused by aging OEM straps Clean, stealthy design that fits seamlessly in factory engine bays Factory length and lug orientation for drop-in fitment 2 AWG tinned copper cable for excellent conductivity and corrosion resistance Zinc-coated lugs, crimped and soldered to resist moisture and oxidation Black UL1015-grade insulation withstands oil, heat, and abrasion Discreet ECS label for a clean, OEM+ look Replaces OEM part numbers 12427549393, 12427795404, and 12427790559.

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ECS - Corporate Logo
T#:48642696
Part#: 059226LA02
In Stock
Sale - Save 25% $ 30.99

This product was last offered at the strikethrough price on
06-14-2026

$ 23.24 USD
Free Shipping
Sale - Save 25%
$ 30.99

This product was last offered at the strikethrough price on
06-14-2026

$ 23.24 USD
Free Shipping

If you're experiencing hard starting, flaky charging, or other electrical issues, your engine ground strap may be the culprit. On E9X BMWs, the engine ground strap is a thin, non-insulated cable that spans from the left engine mount arm to the frame horn. Despite the seemingly simple nature of this part, on older cars, it is known to cause massive headaches. Due to its non-insulated design, years of exposure to water, dirt, and road salt will cause the wire to corrode, ultimately leading to complete failure. A break in this cable will cause an open circuit, resulting in issues with the vehicle's electrical system and potentially leading to a no-start condition.

To solve this issue, ECS has engineered an exact-fit, upgraded ground strap for your E9X BMW! Unlike its OEM counterpart, this design features insulated, large-gauge copper wire for dependable conductivity and long-lasting durability. Additionally, factory-style lugs are zinc-coated, crimped, and soldered, ensuring protection against corrosion and oxidation.

Whether you're replacing a visibly corroded strap or proactively preventing failure, this solution from ECS is sure to provide lasting performance and protection.

FEATURES

Direct-fit replacement and upgrade for RWD E82/E88, E84, and E9X applications Solves intermittent grounding issues caused by aging OEM straps Clean, stealthy design that fits seamlessly in factory engine bays Factory length and lug orientation for drop-in fitment 2 AWG tinned copper cable for excellent conductivity and corrosion resistance Zinc-coated lugs, crimped and soldered to resist moisture and oxidation Black UL1015-grade insulation withstands oil, heat, and abrasion Discreet ECS label for a clean, OEM+ look Replaces OEM part number 12427549396.

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New OEM Bosch Starter Motor - N52, N54, N55, up to 03/11
For vehicles with production date up to 03/2011
Bosch - Corporate Logo
T#:394329
Part#: SR0492N
In Stock
$ 255.99

This product was last offered at the strikethrough price on
03-17-2026

$ 237.99 USD
Free Shipping
$ 237.99 USD
Free Shipping

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. OEM replacement for the original BMW part # 12411312104 and 12411312130. This is a NEW, not used, component with no included core charge!

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!

We recommend replacing hardware when doing your starter, since the bolts are aluminum and threads become stretched: Genuine BMW aluminum starter hardware set 12410392577 

 

Used on a wide variety of models with the BMW N52, N54, and N55 engines, including: E9X, F01/02, F07/10, E8X, E70, E60/61, F25, F30, and Z4.

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OMP - Corporate Logo
T#:1614
Part#: EA-462
In Stock
$ 65.00 USD
Free Shipping
$ 65.00 USD
Free Shipping
OMP Battery Cut Off Switch / Kill Switch, for use in racecars as an emergency "kill switch", to depower the electrical system in the event of a crash or other emergency. This cut off switch is FIA approved, has 6 poles and alternator protection, as well as a removable key.
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Bosch - Corporate Logo
T#:580223
Part#: AL9449X
Ships in 2 Business Days
$ 575.99 USD
Free Shipping
$ 575.99 USD
Free Shipping
Bosch - Corporate Logo
T#:639189
Part#: 12417638195
Ships in 4 Business Days
$ 324.99

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

$ 314.99 USD
Free Shipping
$ 314.99 USD
Free Shipping

Valeo New Starter Motor - E70, E71, E82, E84, E88, E92, E93, F10, F30...
For vehicles with production date from 03/2011
We Price Match - Give Us A Call or Chat!
Valeo - Corporate Logo
T#:594588
Part#: 12417616502
In Stock
$ 265.76 USD
Free Shipping
$ 265.76 USD
Free Shipping
Brand new unit - no core charge! Avoid messing with a core return entirely!
OEM Bosch Remanufactured Starter -- N52 N54 N55 3.0L
For vehicles with production date up to 03/2011
Bosch - Corporate Logo
T#:377503
Part#: 12412344243KT1
In Stock
$ 245.99

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

$ 229.00 USD
Free Shipping
$ 229.00 USD
Free Shipping

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 # 12412354701, 12412344243, and 12417526236.

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!

Includes a $65 core charge.

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Vargas Turbo Technologies - Corporate Logo
T#:51672717
Part#: VTT-MAP-HARNESS
Ships on Sep 16, 2026
New Item
$ 59.99 USD
Free Shipping
$ 59.99 USD
Free Shipping
As part of the VTT-FAB fabrication line, this extension harness is designed for builders and tuners who need flexibility.

Bosch - Corporate Logo
T#:639688
Part#: 12418614519BKT
Ships on Sep 25, 2026
$ 441.99

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

$ 431.99 USD
Free Shipping
$ 431.99 USD
Free Shipping
*Price includes a refundable $75 Core Charge* If your car won't turn over, there is a good chance your starter is shot. Bosch's OEM starter is a high-quality replacement that will give you peace of mind thanks to its long life-span. Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products. As a leading source of high-performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!
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