BMW Electrical Sensors, Switches, & Relays

Braille Performance Endurance AGM Battery - B10049 - 58lbs

This item is classified as Hazardous Materials and requires special shipping and handling. We cannot ship this item out of the US or with priority shi

T#:558078

Part#: B10049

In Stock

$ 446.99 USD

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$ 446.99 USD

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This Group 49 Endurance AGM battery is an ideal upgrade from the factory battery, offering higher cranking power and a longer battery life for less waste and lower cost to the customer. Plus, this battery is maintenance free and won't eat holes in the battery tray and surrounding areas of your car. Endurance AGM batteries from Braille are a drop-in OEM replacement that requires no modifications to be made for installation, has the highest cranking power and longest run times in their class, and also feature AGM internal racing technology developed for their Advanced AGM and Carbon Fiber batteries.

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Braille Performance Lightweight AGM Battery - B14115 - 11.5lbs ...

T#:558037

Part#: B14115

Ships in 5 Business Days

$ 204.99 USD

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$ 204.99 USD

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When building a car for the track, one of the most important factors to consider is weight. Stock batteries can weigh up to almost 50 pounds and are unnecessarily large, designed to power a host of systems not normally used in a track car (radios, lighting, etc.). What can you do to cut weight the weight without affecting your cars operation? This is where Braille Battery comes in with their long line of performance lightweight battery options! Designed to provide the highest cranking power possible while being up to 75% lighter, Braille Battery is one of the foremost leaders in automotive racing batteries with nothing but high quality, high output batteries in mind!

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Meyle Crankshaft Position Sensor - E36, E39, E46, E53, E60, E83, Z3, ...

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T#:369703

Part#: 12141709616

In Stock

$ 46.99 USD

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$ 46.99 USD

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Does not include O-ring

Braille Performance Lightweight Advanced AGM Battery - B2015 - 15lbs ...

T#:558038

Part#: B2015

Ships in 8 Business Days

$ 237.99 USD

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$ 237.99 USD

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When building a car for the track, one of the most important factors to consider is weight. Stock batteries can weigh up to almost 50 pounds and are unnecessarily large, designed to power a host of systems not normally used in a track car (radios, lighting, etc.). What can you do to cut weight the weight without affecting your cars operation? This is where Braille Battery comes in with their long line of performance lightweight battery options! Designed to provide the highest cranking power possible while being up to 75% lighter, Braille Battery is one of the foremost leaders in automotive racing batteries with nothing but high quality, high output batteries in mind! The B2015 is Braille's most popular non-carbon racing battery and is able to start larger engines easily for racing and offers daily driving capability for most 4 and 6 cylinders engine vehicles. Physical Specifications: BCI Group: All sizes Weight: 15lbs / 6.8kg Length: 6.8" / 173mm Width: 3.4" / 86mm Height: 6.1" / 155mm Polarity: Right Side Positive Performance Specifications: Voltage: 12 Full Charge Voltage: 13.2 Pulse Cranking Amps (PCA): 1067 Amp Hour (AH): 21 Life Cycle @ 10% DOD: 3100 *THIS BATTERY REQUIRES A CUSTOM MOUNTING SOLUTION. The size and weight are significantly smaller than a stock battery and will not be held in place by the stock battery mount*

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Braille Lightweight Advanced AGM Battery - B3121 - 21lbs

T#:558042

Part#: B3121

Ships in 6 Business Days

$ 270.99 USD

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$ 270.99 USD

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When building a car for the track, one of the most important factors to consider is weight. Stock batteries can weigh up to almost 50 pounds and are unnecessarily large, designed to power a host of systems not normally used in a track car (radios, lighting, etc.). What can you do to cut weight the weight without affecting your car's operation? This is where Braille Battery comes in with their long line of performance lightweight battery options! Designed to provide the highest cranking power possible while being up to 75% lighter, Braille Battery is one of the foremost leaders in automotive racing batteries with nothing but high quality, high output batteries in mind! The B3121 battery from Braille is their lightest do-everything battery available, offering 1380 pulse cranking amps that can crank over V8 engines with ease while still coming in at under 22 pounds, half of the weight of a standard Group 34 battery! This is thanks to their Advanced AGM racing technology that allows them to put a ton of power into a very small package. Physical Specifications: BCI Group: All sizes Weight: 21lbs / 9.5kg Length: 6.6" / 168mm Width: 5.2" / 132mm Height: 6.8" / 173mm Polarity: Right Side Positive Terminal Type: Steel terminal block with M6 bolt Performance Specifications: Voltage: 12v Recharge Voltage: 14.4V – 14.6V Maintenance charge voltage: 13.8V 5s Pulse Cranking Amps (PCA): 1380 10s PDC: 124 Amp Hour (Ah): 31 Watt Hour (Wh): 372 Life Cycle @ 10% DOD: 3100 Charging Temperature 0C to 50C Discharge Temperature range -40C to +60C Storage temperature -40C to +60C *THIS BATTERY REQUIRES A CUSTOM MOUNTING SOLUTION. The size and weight are significantly smaller than a stock battery and will not be held in place by the stock battery mount*

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Braille Performance Intensity Carbon Lithium-ION Battery - i48CX - 10...

This item is classified as Hazardous Materials and requires special shipping and handling. We cannot ship this item out of the US or with priority shi

T#:558047

Part#: I48CX

Ships in 5 Business Days

$ 1,164.99 USD

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$ 1,164.99 USD

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The ultra-lightweight, standard height I48CX lithium-ION battery from Braille Battery is a popular choice among BMW enthusiasts looking for a drop-in replacement battery that shaves off a ton of weight, 35 pounds in total! Thanks to the Group 48 design of this battery, no modifications are needed for installation. This is perfect for anyone looking to drive their car both on and off of the track, without any negative side effects, and wants a battery with a 10-15 year life span!

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Braille Performance GreenLite Lithium-ION Battery - G30 - 5.5lbs ...

T#:558046

Part#: G30

Ships in 6 Business Days

$ 522.99 USD

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$ 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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Endurance Series AGM Battery - B48-H6-L3

T#:36947237

Part#: B48-H6-L3

Ships in 4 Business Days

$ 398.99 USD

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$ 398.99 USD

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OMP Battery Cut Off Switch / Kill Switch

T#:1614

Part#: EA-462

Back Ordered

$ 65.00 USD

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$ 65.00 USD

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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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Meyle Exhaust Camshaft Position Sensor - BMW S54 S62

5X Entries Into Our F80 M3 Sweepstakes

T#:55497462

Part#: 3148000038

In Stock

$ 27.99

This product was last offered at the strikethrough price on
09-14-2026

$ 25.99 USD

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$ 25.99 USD

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Don't let a failing camshaft position sensor rob your vehicle of power or cut your track day short. This Meyle replacement camshaft sensor is built to deliver fast, highly accurate data to the ECU, preventing the performance drops, sluggish throttle response, and rough idling caused by worn-out factory electronics. Engineered to withstand high underhood heat and intense vibrations, it keeps your ignition timing and fuel delivery tightly synced, whether you are daily driving or pushing through high-RPM pulls.

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Camshaft Position Sensor

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T#:591413

Part#: 12141742185

In Stock at Vendor

$ 108.99

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

$ 99.99 USD

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$ 99.99 USD

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When this sensor fails, it will become impossible to start your car, leaving you stranded.

Knock Sensor

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T#:35964551

Part#: 13627568422

Back Ordered

$ 75.99 USD

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$ 75.99 USD

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This sensor detects engine knocking or pinging and adjusts the timing to ensure optimal engine performance and efficiency.

Meyle Crankshaft Position Sensor - M60

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T#:5958675

Part#: 12141731887

Ships on Nov 23, 2026

$ 59.99 USD

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$ 59.99 USD

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Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. The crankshaft position sensor measures the speed at which the crank is turning and adjusts fueling via the ECU to match. If it fails, your computer will not know the speed and will fuel it improperly. Installs exactly in the place of your old sensor and will eliminate your car's idle, performance, and misfiring problems.

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Meyle Crankshaft Position Sensor - E31, E38, E39, E52, E60, E63, E64,...

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T#:579358

Part#: 3148990000

Ships on Nov 23, 2026

$ 37.99 USD

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$ 37.99 USD

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Referred to as the speed sensor & reference sensor

Voltage Regulator

T#:596879

Part#: 12321350052

Back Ordered

$ 41.99

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

$ 39.71 USD

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$ 39.71 USD

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If you are having issues with voltage peaking, lights fading in and out as your driving, or your battery keeps dying despite the car running, It could be the result of a faulty voltage regulator. Voltage regulators control the amount of power coming from the alternator.

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Meyle Crankshaft Pulse Sensor - 3148100018 - G20, G30 5 Series, G32 6...

5X Entries Into Our F80 M3 Sweepstakes

T#:55030835

Part#: 3148100018

In Stock

$ 15.99 USD

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$ 15.99 USD

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Keep your ultimate driving machine running the way it was engineered to with this reliable replacement.

Meyle N20 Crankshaft Position Sensor - 3148100013 - F3x, F22, F23, F1...

5X Entries Into Our F80 M3 Sweepstakes

T#:55030834

Part#: 3148100013

In Stock

$ 36.99 USD

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$ 36.99 USD

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This Meyle Crankshaft Position Sensor is the perfect solution for restoring the critical engine speed data your ECU relies on.

Intensity Lithium-ION Battery - i34RX - 11.5lbs

T#:54388454

Part#: I34RX

Ships on Nov 17, 2026

$ 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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SEG Automotive Alternator - SEG Automotive 0121.715.118 - 12317560985...

T#:54851991

Part#: 12317560985

Ships in 1 Business Day

$ 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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MINI Alternator - SEG Automotive 0125.711.078

T#:54851993

Part#: 12317613445

In Stock

$ 564.99

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

$ 563.99 USD

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$ 563.99 USD

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Battery Tender Plus Advanced Battery Charging System

T#:49892371

Part#: BTT0210128

In Stock at Vendor

$ 69.99 USD

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$ 69.99 USD

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SEG Automotive Alternator - SEG Automotive 0124.525.588 - 12317541694...

T#:54851984

Part#: 12317541694

Ships in 1 Business Day

$ 521.99

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

$ 474.99 USD

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$ 474.99 USD

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SEG Automotive Starter - SEG Automotive 0001.108.460 - 12417610344 - ...

T#:55857741

Part#: 12417610344

Ships in 1 Business Day

$ 368.99

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

$ 340.99 USD

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$ 340.99 USD

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Vargas Plug & Play Pre And Post Throttle MAP Sensor Kit - 6B 4W - BMW...

2X Entries Into Our F80 M3 Sweepstakes

T#:52129729

Part#: VTT56BSENSKIT64

Ships in 10 Business Days

$ 209.99 USD

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$ 209.99 USD

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The VTT 6-Bar MAP sensor kit provides the necessary overhead to monitor boost levels with a linear voltage scale that makes software calibration straightforward.

MINI Starter - SEG Automotive 0001.106.026

T#:54851997

Part#: 12411489995

Ships in 1 Business Day

$ 432.99

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

$ 406.99 USD

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$ 406.99 USD

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Vargas Turbo Technologies USB To Serial For HPFP Controller - N54-USB...

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T#:51778112

Part#: N54-USB-SERIAL-H

Ships in 10 Business Days

$ 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, S6...

2X Entries Into Our F80 M3 Sweepstakes

T#:51672717

Part#: VTT-MAP-HARNESS

Ships in 10 Business Days

$ 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.

MINI Alternator - SEG Automotive 0124.325.157

T#:54851988

Part#: 12317550319

Ships in 1 Business Day

$ 473.99

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

$ 436.99 USD

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$ 436.99 USD

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SEG Automotive Alternator - SEG Automotive 0124.515.223 - 12317519618...

T#:54851980

Part#: 12317519618

Ships in 1 Business Day

$ 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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Vargas Coolant Level Extension Harness - BMW B48/B58/S58

2X Entries Into Our F80 M3 Sweepstakes

T#:51813310

Part#: VTT-FAB-HC

Ships in 10 Business Days

$ 49.99 USD

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$ 49.99 USD

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Simplify your next fabrication project with the VTT-FAB series Coolant Extension Harness.

High Performance AGM Battery Optima REDTOP - 35

T#:26238452

Part#: OPT-35

Special Order: No Guaranteed ETA

$ 332.99 USD

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$ 332.99 USD

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Elevate your Mini's performance with the REDTOP High-Performance AGM Battery, the ultimate starting battery designed to ensure a reliable ignition every time. Engineered for strong starting bursts, this battery offers high-power delivery and extreme resistance to common causes of battery failure. Enjoy key benefits including up to 3X longer life, 15 times more vibration resistance, virtually spill-proof design, and mountability in any position. With maintenance-free operation and faster recharging, this battery provides optimal starting power for your Mini.

Strongest starting burst for reliable ignition
Up to 3X longer life for extended durability
15 times more vibration resistance for enhanced reliability
Virtually spill-proof design for peace of mind
Mountable in virtually any position for convenience
Maintenance-free operation for hassle-free use
Faster recharging for minimal downtime
Optimal starting power for your Mini

Specs:

Weight: 31.7 lbs
Reserve Capacity: 44 Ah
Post Type: SAE Post
CCA: 720 Amp
Width: 6.75 in
Length: 9.38 in
Height: 7.69 in

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Knock Sensor

5X Entries Into Our F80 M3 Sweepstakes

T#:55353615

Part#: 12141716055

Back Ordered

$ 28.99 USD

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$ 28.99 USD

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This Meyle replacement knock sensor is the perfect solution for keeping your high-performance engine safe and running at its absolute peak.

Oil Pressure Switch

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T#:5944185

Part#: 12618611273

Ships on Nov 23, 2026

$ 6.99 USD

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$ 6.99 USD

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This Meyle Oil Pressure Switch is the ideal service replacement to keep your BMW or European powerhouse performing reliably on the street or track.

Meyle Crank Position Sensor - E36, E34

5X Entries Into Our F80 M3 Sweepstakes

T#:55497425

Part#: 3148998003

Ships on Nov 23, 2026

$ 26.99

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

$ 24.99 USD

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$ 24.99 USD

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Don't let a basic sensor keep your E36 or E34 off the tarmac—swap in this high-quality Meyle unit and drive with confidence.

SEG Automotive New 150A Alternator - 0124.525.561 - E21, E30, E36, E4...

T#:58965212

Part#: 0124.525.561

Ships on Nov 24, 2026

$ 487.99 USD

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$ 487.99 USD

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SEG Automotive, the company behind Bosch's starter motor and generator business, builds this brand-new 150-amp alternator with a freewheel pulley that smooths out belt loads for a quieter, longer-lasting accessory drive.

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Starter Motor

T#:59001789

Part#: 12417570487

Ships on Nov 24, 2026

$ 325.99 USD

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$ 325.99 USD

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This SEG Automotive unit is built as a direct replacement for the factory 0.9 kW starter on the R50 Hatch and R52 Convertible.

SEG Automotive New Alternator - 0124.525.523 - E46 325i 325Ci 330Ci, ...

T#:58965213

Part#: 0124.525.523

Ships on Nov 24, 2026

$ 495.99 USD

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$ 495.99 USD

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Your BMW's charging system powers everything from ignition to infotainment, so a weak alternator affects the whole car.

SEG Automotive New 120A Alternator - 0124.515.052 - E46, E39 525i 530...

T#:58965210

Part#: 0124.515.052

Ships on Nov 24, 2026

$ 485.99 USD

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$ 485.99 USD

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A strong charging system keeps everything from your ignition to your stereo working at its best, and a failing alternator can undermine all of it.

SEG Automotive N47 N57 Starter Motor - 0001.148.508 - F3x, F10 5 Seri...

T#:58965209

Part#: 0001.148.508

Ships on Nov 24, 2026

$ 274.99 USD

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$ 274.99 USD

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A healthy starter is what gets your BMW from parked to pulling away without a second thought.

SEG Automotive Starter - 12418589891 - G30 540d xDrive

T#:59001787

Part#: 12418589891

Ships on Nov 24, 2026

$ 276.99 USD

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$ 276.99 USD

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Modern G-chassis BMWs deliver serious performance, and none of it matters if the engine won't start.

SEG Automotive B46 B48 New Starter Motor - 0001.170.202 - F3x 330i 43...

T#:58965208

Part#: 0001.170.202

Ships on Nov 24, 2026

$ 216.99 USD

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$ 216.99 USD

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The smart choice for F-chassis owners who want their car starting on the first try, every time.

Starter Motor

T#:59001784

Part#: 12417616698

Ships on Nov 24, 2026

$ 275.99 USD

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$ 275.99 USD

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On a MINI built for quick, spirited driving, there is no reason to put up with slow or hesitant cranking.

SEG Automotive Alternator - 12311711204 - E24 635CSi

T#:59001785

Part#: 12311711204

Ships on Nov 24, 2026

$ 726.99 USD

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$ 726.99 USD

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The E24 M635CSi is one of BMW's great grand tourers, and keeping one healthy means a charging system you can count on.

Meyle Crankshaft Pulse Sensor - 314810014 - E9x, F3x, F8x, E8x, F22, ...

5X Entries Into Our F80 M3 Sweepstakes

T#:52762518

Part#: 314810014

Ships on Nov 23, 2026

$ 19.99 USD

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Qty

$ 19.99 USD

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Revitalize your vehicle’s performance and reliability with the MEYLE Crankshaft Pulse Sensor.

Coolant Temperature Sensor

5X Entries Into Our F80 M3 Sweepstakes
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T#:5886984

Part#: 13627823993

Ships on Nov 23, 2026

$ 34.99 USD

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$ 34.99 USD

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Part of the EGR cooling system. Located in the coolant line near the aux water pump.

Camshaft Sensor

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T#:36540587

Part#: 12141485845

Ships on Nov 23, 2026

$ 32.99 USD

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$ 32.99 USD

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Intake air temperature sensor

5X Entries Into Our F80 M3 Sweepstakes

T#:58307544

Part#: 13628519445

Ships on Jan 19, 2027

$ 25.99 USD

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$ 25.99 USD

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Temperature Sensor

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T#:637028

Part#: 12621710511

Ships on Nov 23, 2026

$ 15.99 USD

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$ 15.99 USD

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Meyle Camshaft Position Sensor - E38 E39 E53 M62 (09/1998 and up) ...

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T#:35829319

Part#: 12147539166

Ships on Nov 23, 2026

$ 32.99 USD

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$ 32.99 USD

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When this sensor fails, it will become impossible to start your car, leaving you stranded.

Meyle Camshaft Position Sensor - 3148100005 - I01 i3

5X Entries Into Our F80 M3 Sweepstakes

T#:52762526

Part#: 3148100005

Ships on Nov 23, 2026

$ 30.99 USD

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$ 30.99 USD

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The MEYLE Camshaft Position Sensor restores the "timing" of your engine, ensuring your fuel is injected at the perfect millisecond.

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