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

Ships in 8 Business Days

$ 446.99 USD

Add to Wish List

Qty

$ 446.99 USD

Add to Wish List

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.

Show More Show Less

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

T#:558037

Part#: B14115

Ships in 5 Business Days

$ 204.99 USD

Add to Wish List

Qty

$ 204.99 USD

Add to Wish List

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!

Show More Show Less

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

T#:558038

Part#: B2015

Ships in 7 Business Days

$ 237.99 USD

Add to Wish List

Qty

$ 237.99 USD

Add to Wish List

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*

Show More Show Less

Braille Lightweight Advanced AGM Battery - B3121 - 21lbs

T#:558042

Part#: B3121

Ships in 6 Business Days

$ 270.99 USD

Add to Wish List

Qty

$ 270.99 USD

Add to Wish List

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*

Show More Show Less

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 4 Business Days

$ 1,164.99 USD

Add to Wish List

Qty

$ 1,164.99 USD

Add to Wish List

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!

Show More Show Less

Endurance Series AGM Battery - B48-H6-L3

T#:36947237

Part#: B48-H6-L3

Ships in 4 Business Days

$ 398.99 USD

Add to Wish List

Qty

$ 398.99 USD

Add to Wish List

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

T#:558046

Part#: G30

Ships on Aug 6, 2026

$ 522.99 USD

Add to Wish List

Qty

$ 522.99 USD

Add to Wish List

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.

Show More Show Less

Hitachi Voltage Regulator - BMW E31 E32 E34 E36

T#:48850064

Part#: 12311747920

Ships in 6 Business Days

$ 37.99 USD

Add to Wish List

Qty

$ 37.99 USD

Add to Wish List

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.

Show More Show Less

Alternator Pulley - E82 E90 E92 E60

We Price Match - Give Us A Call or Chat!

T#:19332

Part#: 12317570152

Ships in 1-2 days

$ 66.99 USD

Add to Wish List

Qty

$ 66.99 USD

Add to Wish List

This OEM alternator pulley has a ratcheting mechanism inside that can wear out, causing a rattling sound. This mechanism allows the alternator to freewheel to a degree. This is only for the Valeo brand alternator/

This item fits the following BMWs:
2008+ E82 BMW 128i with N51 engine
2006-2007 E90 BMW 325i 325xi 330i 330xi - Sedan
2006-2007 E90 BMW 328i 328xi - Sedan with N51 engine
2006-2007 E91 BMW 325xi - Wagon
2007-2007 E92 BMW 328i 328xi 328i xDrive - Coupe with N51 engine
2006-2007 E60 BMW 525i 525xi 530i 530xi

Show More Show Less

Voltage Regulator

T#:596879

Part#: 12321350052

In Stock at Vendor

$ 41.99

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

$ 40.99 USD

Add to Wish List

Qty

$ 40.99 USD

Add to Wish List

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.

Show More Show Less

AUTOTECKNIC Dry Carbon Fiber Battery Terminal Cover - G87 M2 ...

T#:21012623

Part#: ATK-BM-0420-G87

Ships in 7 Business Days

$ 495.00 USD

Add to Wish List

Qty

$ 495.00 USD

Add to Wish List

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!

Show More Show Less

Intensity Lithium-ION Battery - i34RX - 11.5lbs

T#:54388454

Part#: I34RX

Ships in 6 Business Days

$ 949.99 USD

Add to Wish List

Qty

$ 949.99 USD

Add to Wish List

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.

Show More Show Less

Battery Tender Plus Advanced Battery Charging System

T#:49892371

Part#: BTT0210128

In Stock at Vendor

$ 69.99 USD

Add to Wish List

Qty

$ 69.99 USD

Add to Wish List

Hitachi Engine Camshaft Position Sensor - BMW S63M N63B/N63M/N63R S68...

T#:48850059

Part#: 13628697982

Ships in 6 Business Days

$ 48.99 USD

Add to Wish List

Qty

$ 48.99 USD

Add to Wish List

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.

Show More Show Less

Hitachi Camshaft Position Sensor - BMW E9X F3X F8X N20 N52 N55 S55 ...

T#:48815454

Part#: 13627525014

Ships in 6 Business Days

$ 40.00 USD

Add to Wish List

Qty

$ 40.00 USD

Add to Wish List

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.

Show More Show Less

T#:48850081

Part#: 13627806782

Ships in 6 Business Days

$ 81.99 USD

Add to Wish List

Qty

$ 81.99 USD

Add to Wish List

Tells the computer whether the timing is correct in the engine.

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

T#:51813310

Part#: VTT-FAB-HC

Ships in 10 Business Days

$ 49.99 USD

Add to Wish List

Qty

$ 49.99 USD

Add to Wish List

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

Hitachi Voltage Regulator - BMW E88 N52

T#:48815477

Part#: 12317550469

Ships in 6 Business Days

$ 79.99 USD

Add to Wish List

Qty

$ 79.99 USD

Add to Wish List

Supplies power to your car's electronics and recharges the battery.

Vargas MAP Sensor Extension Harness - BMW B58, N54, N55, S55, S58, S6...

T#:51672717

Part#: VTT-MAP-HARNESS

Ships in 10 Business Days

$ 59.99 USD

Add to Wish List

Qty

$ 59.99 USD

Add to Wish List

As part of the VTT-FAB fabrication line, this extension harness is designed for builders and tuners who need flexibility.

Vargas USB To Serial For HPFP Controller - BMW N54

T#:51778112

Part#: N54-USB-SERIAL-H

Ships in 10 Business Days

$ 37.99 USD

Add to Wish List

Qty

$ 37.99 USD

Add to Wish List

Take full control of your N54’s fueling system with the Vargas Turbo Technologies USB to Serial adapter.

High Performance AGM Battery Optima REDTOP - 35

T#:26238452

Part#: OPT-35

Back Ordered

$ 332.99 USD

Add to Wish List

Qty

$ 332.99 USD

Add to Wish List

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

Show More Show Less

Hitachi Crankshaft Position Sensor - BMW M52 S52 M54

T#:48815470

Part#: 12141709616

Back Ordered

$ 32.99 USD

Add to Wish List

Qty

$ 32.99 USD

Add to Wish List

NOTE: Does not include o-ring seal - see BMW # 12141748398 This is the crankshaft position sensor. It provides information for the ECU. A faulty sensor can cause issues with timing adjustment and limit performance and vehicle operation. Replace your sensor with a high-quality Hitachi sensor to restore peak performance.

Show More Show Less

Hitachi Crankshaft Position Sensor - BMW N20 N26 2.0L

T#:48815475

Part#: 13627595860

Back Ordered

$ 68.99 USD

Add to Wish List

Qty

$ 68.99 USD

Add to Wish List

This is the crankshaft position sensor. It provides information for the ECU. A faulty sensor can cause issues with timing adjustment and limit performance and vehicle operation. Replace your sensor with a high-quality Hitachi sensor to restore peak performance.

Show More Show Less

Hitachi Voltage Regulator - BMW E36 Z3 E34

T#:48850070

Part#: 12321739435

Back Ordered

$ 60.99 USD

Add to Wish List

Qty

$ 60.99 USD

Add to Wish List

Alternator voltage regulators are a crucial component that controls the alternator's output, preventing overcharging by adjusting the current to keep vehicle voltage within a safe range, 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

Show More Show Less

OEM INA Alternator Pulley - Overrunning Type - E82, E88, E9x, F10, F2...

T#:42167226

Part#: EA0141

Back Ordered

$ 71.99 USD

Add to Wish List

Qty

$ 71.99 USD

Add to Wish List

Whether you're replacing a failing alternator pulley or performing preventive maintenance, this Alternator Pulley ensures your BMW continues to perform with factory precision and reliability.

OEM INA Alternator Pulley - E60, E90

T#:42167235

Part#: EA0202

Back Ordered

$ 46.99

This product was last offered at the strikethrough price on
06-19-2026

$ 33.99 USD

Add to Wish List

Qty

$ 33.99 USD

Add to Wish List

Whether you have a failing component or are performing preventive maintenance, this INA Alternator Pulley from Turner Motorsport is the perfect choice to keep your BMW’s electrical and accessory systems operating at peak performance.

Show More Show Less

Accessory Drive Belt Kit - E34, E83

T#:42167237

Part#: FB0198K

Back Ordered

$ 166.99 USD

Add to Wish List

Qty

$ 166.99 USD

Add to Wish List

Ideal for scheduled maintenance or as a preventive repair, the Accessory Drive Belt Kit offers dependable performance and peace of mind for BMW owners looking to maintain factory-quality operation and longevity

Show More Show Less

Project Cars

SELECT YOUR BMW

BMW Electrical Sensors, Switches, & Relays

Sub-Categories

Select Vehicle

Purpose

Category

Brand

Price

Special Offers

Shipping

Narrow Results