BMW Electrical Sensors, Switches, & Relays

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

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T#:558037

Part#: B14115

Ships in 5 Business Days

$ 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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BMW E6X / E8X / E9X - N52 Replacement Starter Kit

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T#:15777314

Part#: SR0492NKT2-KT

In Stock

$ 284.99

This product was last offered at the strikethrough price on
08-14-2026

$ 277.99 USD

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$ 277.99 USD

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Is your car having trouble starting? Does your starter click when you turn the key? Sounds like it's time for a new starter motor! Includes new starter with no core charge, intake gaskets, throttle body gasket and hardware.

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

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T#:558038

Part#: B2015

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$ 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

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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...

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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

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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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Voltage Regulator

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T#:594108

Part#: 12317603775

Ships in 1 Business Day

$ 71.56

This product was last offered at the strikethrough price on
10-27-2026

$ 64.00 USD

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$ 64.00 USD

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Have you noticed inconsistent electrical power in your interior lately? Your voltage regulator is responsible for maintaining a constant voltage out from the alternator.

Bosch Starter Motor With Hardware

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T#:56110332

Part#: SR0492NKT4

In Stock

$ 273.99

This product was last offered at the strikethrough price on
08-14-2026

$ 261.99 USD

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$ 261.99 USD

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At the core is a brand-new Bosch Starter Motor, engineered to withstand extreme operating conditions while delivering immediate cranking speed. This kit includes also the required Genuine BMW Aluminum Mounting Screw Set.

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Valvetronic Camshaft Adjuster replacement kit

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T#:15677492

Part#: 11127556161-KT

In Stock

Sale - Save 19% $ 220.99

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

$ 179.28 USD

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$ 220.99

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

$ 179.28 USD

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Valv-tronic adjuster unit, Changes the the timing shaft to adjust the valve timing.

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

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T#:558046

Part#: G30

Ships in 6 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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Valeo Voltage Regulator - Valeo - E53, E60, E63, E64, E70

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T#:1196078

Part#: 12318510090

Ships in 1 Business Day

$ 92.82

This product was last offered at the strikethrough price on
10-27-2026

$ 83.01 USD

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$ 83.01 USD

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OEM replacement for you BMW alternator fixing charging issues

Eccentric Shaft Sensor Kit

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T#:15677508

Part#: 11127581215-KT

In Stock

Sale - Save 18% $ 270.16

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

$ 221.57 USD

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Sale - Save 18%

$ 270.16

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

$ 221.57 USD

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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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Alternator

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T#:594101

Part#: 12318570672

Ships in 1 Business Day

$ 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

Alternator Pulley - E82 E90 E92 E60

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T#:19332

Part#: 12317570152

Ships in 1-2 days

$ 66.99 USD

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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

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Voltage Regulator

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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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MINI Alternator - SEG Automotive 0125.711.078

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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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Intensity Lithium-ION Battery - i34RX - 11.5lbs

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T#:54388454

Part#: I34RX

Ships on Nov 16, 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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AUTOTECKNIC Dry Carbon Fiber Battery Terminal Cover - G87 M2 ...

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T#:21012623

Part#: ATK-BM-0420-G87

Ships in 7 Business Days

$ 495.00 USD

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$ 495.00 USD

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The boldly styled G87 already touts carbon features but carbon fiber is not very often displayed in the engine bay. If you are looking to give your engine bay some carbon spark, AUTOTECKNIC introduces you to their dry carbon battery terminal cover to beautify your engine bay and bring a smile to your face every time you open the hood of your S58 monster! Made from high-quality carbon, this product is sure to stand the test of time!

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

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

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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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MINI Alternator - SEG Automotive 0124.325.157

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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...

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

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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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MINI Starter - SEG Automotive 0001.106.026

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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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Remanufactured Alternator - 170A

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T#:594098

Part#: 12317802929

Ships in 1 day

$ 541.55

This product was last offered at the strikethrough price on
09-22-2026

$ 515.75 USD

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$ 515.75 USD

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Replacement Alternator from Valeo

MINI N14 N18 Alternator - 120 Amp 439617

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T#:28803228

Part#: 12317619254

Ships on Nov 23, 2026

$ 374.99 USD

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$ 374.99 USD

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MINI N14 N18 Alternator is an essential component for powering the electrical system of your Mini. Engineered to provide reliable performance, this alternator ensures your Mini stays running smoothly. Upgrade your Mini with this genuine alternator for dependable power generation.

Powers the electrical system
Reliable performance
Ensures smooth operation
Genuine Mini part

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

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T#:58965208

Part#: 0001.170.202

Ships on Nov 23, 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

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T#:59001784

Part#: 12417616698

Ships on Nov 23, 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 New 150A Alternator - 0124.525.561 - E21, E30, E36, E4...

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T#:58965212

Part#: 0124.525.561

Ships on Nov 23, 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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SEG Automotive N47 N57 Starter Motor - 0001.148.508 - F3x, F10 5 Seri...

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T#:58965209

Part#: 0001.148.508

Ships on Nov 23, 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.

Starter Motor

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T#:59001789

Part#: 12417570487

Ships on Nov 23, 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 120A Alternator - 0124.515.052 - E46, E39 525i 530...

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T#:58965210

Part#: 0124.515.052

Ships on Nov 23, 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 Starter - 12418589891 - G30 540d xDrive

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T#:59001787

Part#: 12418589891

Ships on Nov 23, 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 New Alternator - 0124.525.523 - E46 325i 325Ci 330Ci, ...

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T#:58965213

Part#: 0124.525.523

Ships on Nov 23, 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.

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

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T#:42167226

Part#: EA0141

Back Ordered

$ 71.99 USD

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$ 71.99 USD

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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.

Alternator

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T#:594102

Part#: 12311247288

Back Ordered

$ 547.99

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

$ 389.23 USD

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$ 389.23 USD

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Replacement Alternator from Valeo

OEM INA Alternator Pulley - E60, E90

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T#:42167235

Part#: EA0202

Back Ordered

$ 46.99

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

$ 33.99 USD

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$ 33.99 USD

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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.

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Accessory Drive Belt Kit - E34, E83

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T#:42167237

Part#: FB0198K

Back Ordered

$ 166.99 USD

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$ 166.99 USD

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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

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