BMW Electrical Sensors, Switches, & Relays

New Alternator - 140amp | BMW E36 E34 M50 M52 S50 S52

T#:25042544

Part#: 12311744567

Ships in 3 Business Days

Sale - Save 15% $ 219.99

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

$ 186.99 USD

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$ 219.99

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

$ 186.99 USD

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New Alternator - 180 Amp

T#:26438187

Part#: 12317558220

Ships in 3 Business Days

Sale - Save 10% $ 294.99

This product was last offered at the strikethrough price on
06-30-2026

$ 265.49 USD

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Sale - Save 10%

$ 294.99

This product was last offered at the strikethrough price on
06-30-2026

$ 265.49 USD

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Crankshaft Position Sensor - E36 (OBDI), E34 M50/S50

T#:579816

Part#: 52380

In Stock

Sale - Save 20% $ 48.99

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

$ 39.19 USD

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$ 48.99

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

$ 39.19 USD

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Common cause of misfires, poor fuel economy, or a crank no start situation. If your M50 or S50 has any of these symptoms, this crankshaft position sensor from Bavarian Autosport is a likely fix.

Alternator - 180amp

T#:26438185

Part#: 12317837981

In Stock

Sale - Save 15% $ 304.99

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

$ 259.24 USD

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$ 304.99

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

$ 259.24 USD

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New Alternator - 120A

T#:25042543

Part#: 12317501690

Ships on Aug 12, 2026

Sale - Save 20% $ 211.99

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

$ 169.59 USD

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Sale - Save 20%

$ 211.99

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

$ 169.59 USD

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Bav Auto Camshaft Position Sensor - BMW E36 E39 Z3 M52 S52

T#:639841

Part#: 12141703221

In Stock

Sale - Save 20% $ 37.99

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

$ 30.39 USD

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Sale - Save 20%

$ 37.99

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

$ 30.39 USD

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Faulty camshaft sensors can lead to a number of issues such as hard starts, stalling at low speeds, and check engine (SES) lights. Restore your BMW's smooth operation and reliability by replacing it with a high-quality camshaft sensor from Bav Auto! From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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OEM Valeo Alternator - 180amp - E9X M3 S65

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T#:377508

Part#: 12317837981

In Stock

$ 630.99

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

$ 404.99 USD

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$ 404.99 USD

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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!

OEM Starter Motor - E46 M3 2001-2006

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T#:2988

Part#: 12417835735

In Stock

$ 400.99

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

$ 293.99 USD

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$ 293.99 USD

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This is the starter motor for BMW E46 M3 2001-2006 is an OEM Valeo unit.

This item fits the following BMWs:
2001-2006 E46 BMW M3. M3 Convertible
2001-2002 Z3 BMW Z3 M Roadster Z3 M Coupe
2005-2008 E85 BMW Z4 M Roadster Z4 M Coupe

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Alternator - 120amp

T#:25042542

Part#: 12317831436

Ships on Sep 22, 2026

Sale - Save 20% $ 222.99

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

$ 178.39 USD

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Sale - Save 20%

$ 222.99

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

$ 178.39 USD

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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

$ 91.37 USD

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$ 91.37 USD

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OEM replacement for you BMW alternator fixing charging issues

E46 M3, MZ3 S54 OEM Valeo Alternator (New)

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T#:377735

Part#: 12317831436

In Stock

$ 522.00

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

$ 463.99 USD

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$ 463.99 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.

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Voltage Regulator

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T#:594108

Part#: 12317603775

Ships in 1 Business Day

$ 71.22

This product was last offered at the strikethrough price on
05-04-2026

$ 70.45 USD

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$ 70.45 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.

OEM Valeo Alternator - E60 M5, E63/64 M6

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T#:14835

Part#: 12317836592

Ships in 7 Business Days

$ 358.99 USD

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$ 358.99 USD

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This is a Valeo brand new 170 amp alternator. These 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 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!

This item fits the following BMWs:
2006-2010 E60 BMW M5
2006-2010 E63 BMW M6

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Bav Auto Camshaft Position Sensor - E38 740i 740iL 750iL

T#:639840

Part#: 12141742185

Back Ordered

Sale - Save 15% $ 66.99

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

$ 56.94 USD

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Sale - Save 15%

$ 66.99

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

$ 56.94 USD

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Faulty camshaft sensors can lead to a number of issues such as hard starts, stalling at low speeds, and check engine (SES) lights. Restore your BMW's smooth operation and reliability by replacing it with a high-quality camshaft sensor from Bav Auto! From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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OMP Battery Cut Off Switch / Kill Switch

T#:1614

Part#: EA-462

In Stock

$ 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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Alternator - 150 Amp - Valeo

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T#:579634

Part#: 439590

In Stock

$ 620.35

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

$ 518.99 USD

Limited Qty Sale

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$ 620.35

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

$ 518.99 USD

Limited Qty Sale

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Valeo New Alternator - 80 Amp - E34, E36

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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

OEM Valeo Alternator - 185 amp

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T#:376244

Part#: 12317525376

Ships in 1 Business Day

$ 730.23

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

$ 647.45 USD

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$ 647.45 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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Valeo Brand New Alternator - E89 Z4 M Coupe/Roadster

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T#:379218

Part#: 12317837691KT

Ships in 6 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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Hitachi Voltage Regulator - BMW E31 E32 E34 E36

T#:48850064

Part#: 12311747920

Ships in 7 Business Days

$ 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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Alternator

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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

Valeo New Starter Motor - E70, E71, E82, E84, E88, E92, E93, F10, F30...

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T#:594588

Part#: 12417616502

Ships in 4 Business Days

$ 265.76 USD

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$ 265.76 USD

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Brand new unit - no core charge! Avoid messing with a core return entirely!

Valeo New Alternator - 230 Amp - E71, F01, F02

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T#:579635

Part#: 439640

Ships on Aug 17, 2026

$ 590.99 USD

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$ 590.99 USD

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New Replacement Alternator From Valeo - 12317603781

OEM Valeo New Alternator - 230amp

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T#:383432

Part#: 12317603782

Ships on Aug 17, 2026

$ 730.99 USD

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$ 730.99 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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Bav Auto Crankshaft Position Sensor - Multiple BMWs

T#:639826

Part#: 13627525015

Special Order: No Guaranteed ETA

$ 67.99 USD

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$ 67.99 USD

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This crankshaft position sensor provides the ECU with the engine speed signal. It is mounted in either the engine block or the bell housing of the transmission on most cars. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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OEM Valeo Alternator - 120amp - E39 E46 E53 Z3, M54 with Valeo Altern...

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T#:371896

Part#: 12317501599

In Stock

$ 323.99 USD

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$ 323.99 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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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

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$ 40.99 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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OEM Valeo Alternator - E60 E63 E65 550i 650i 750i

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T#:379446

Part#: 12317542935KT

Back Ordered

$ 444.99 USD

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$ 444.99 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!

For vehicles with production date from 03/2005.

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Valeo Alternator - 180 Amp - E70

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T#:377914

Part#: 12317561004

Ships in 6 Business Days

$ 482.99 USD

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$ 482.99 USD

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Brand new unit with no core charge.

OEM Valeo Starter (New)

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T#:380773

Part#: 12417835737

Back Ordered

$ 593.99 USD

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$ 593.99 USD

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A failed starter will leave even the best-maintained BMW stranded. Replace your failed starter motor with this brand new replacement from Valeo. Valeo is an OEM BMW supplier - save money and by quality parts by buying them in a different box!

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Bav Auto Intake Air Temperature Sensor - BMW E9X M3 S65

T#:639824

Part#: 13627792203

In Stock

$ 24.99

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

$ 19.99 USD

Limited Qty Sale

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$ 24.99

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

$ 19.99 USD

Limited Qty Sale

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This sensor provides your BMW's control unit with intake temperature readings in order 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! From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Alternator - 220 Amp

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T#:594099

Part#: 12317560989

Ships on Aug 10, 2026

$ 574.96 USD

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$ 574.96 USD

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Replacement Alternator from Valeo

Alternator

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T#:594100

Part#: 12317561002

In Stock at Vendor

$ 794.99

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

$ 771.99 USD

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$ 771.99 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.

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Valeo Alternator - E53

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T#:377182

Part#: 12317540994

Special Order: No Guaranteed ETA

$ 384.99 USD

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$ 384.99 USD

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Restore charging system voltage with a new alternator

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

T#:48815454

Part#: 13627525014

Ships in 7 Business Days

$ 40.00 USD

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$ 40.00 USD

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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.

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Hitachi Engine Crankshaft Position Sensor - BMW N52 N54 S85 S65 S63 ...

T#:48815471

Part#: 13627525015

Ships in 7 Business Days

$ 66.99 USD

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$ 66.99 USD

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The crankshaft position sensor transmits the crankshaft's position 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 crank position sensor.

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Hitachi Engine Crankshaft Position Sensor - BMW F2X F3X

T#:48850074

Part#: 13627582842

Ships in 7 Business Days

$ 184.99 USD

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$ 184.99 USD

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Engine cranks but doesn't start? This sensor is often the issue.

Hitachi Crankshaft Sensor - BMW B46 B48 B58

T#:48850081

Part#: 13627806782

Ships in 7 Business Days

$ 81.99 USD

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$ 81.99 USD

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

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

T#:48850059

Part#: 13628697982

Ships in 7 Business Days

$ 48.99 USD

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$ 48.99 USD

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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.

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Hitachi Camshaft Position Sensor - E39, E46, E53, E60, E63, E64, E65,...

T#:48850055

Part#: 12147518628

Ships in 3 Business Days

$ 71.99 USD

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$ 71.99 USD

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The camshaft position sensor is essential for assisting the engine DME by monitoring the camshaft's position. The data from this sensor is key to optimizing ignition timing and ensuring smooth engine performance. Often referred to as the CMP sensor, this component is crucial for the overall functionality of the powertrain. A failing camshaft position sensor can cause a range of issues, including engine stumbling, hesitation during acceleration, power loss, and even starting difficulties or complete failure to start.

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Hitachi Camshaft Position Sensor - Intake - BMW M52TU M54

T#:48850072

Part#: 12147539165

Ships in 6 Business Days

$ 41.99 USD

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$ 41.99 USD

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A bad cam sensor can cause a variety of problems from hard starting to stalling at low speeds. Cam sensor replacement has been known to cure many drivabilty issues. Uses O-ring # 12 141 748 398 (not included)

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Hitachi Voltage Regulator - BMW E88 N52

T#:48815477

Part#: 12317550469

Ships in 7 Business Days

$ 79.99 USD

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Qty

$ 79.99 USD

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

Alternator - 220 Amp

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T#:639716

Part#: 12317804266

In Stock at Vendor

$ 822.99

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

$ 799.99 USD

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Qty

$ 799.99 USD

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Morimoto Standalone Can-Bus Wiring Harness - H4 / 9003 - Priced Each ...

T#:54388428

Part#: H240

Ships on Aug 7, 2026

$ 21.99 USD

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Qty

$ 21.99 USD

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Remanufactured Alternator - 170A

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T#:594098

Part#: 12317802929

Ships on Aug 10, 2026

$ 323.99 USD

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Qty

$ 323.99 USD

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Replacement Alternator from Valeo

MINI N14 N18 Alternator - 120 Amp 439617

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T#:28803228

Part#: 12317619254

In Stock

$ 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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Bav Auto Temperature Sensor - BMW E39 E46 E9X E60 F01/02

T#:639833

Part#: 13621433076

In Stock

Sale - Save 20% $ 14.99

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

$ 11.99 USD

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Qty

Sale - Save 20%

$ 14.99

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

$ 11.99 USD

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This is the coolant temperature sensor used in many BMW models from the late-1990s to the mid-2010s. The engine computer relies on the coolant temp to set the fuel mapping for the engine. As the car warms up the computer changes the fuel mixture. If your car is running a bit rich (too much fuel) it could be because this sensor is failing and not sending the correct info to the computer. This sensor is located in a variety of places depending on the engine. But it's one of those easy replacement items 'while you're in there' when doing a water pump or thermostat replacement. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Hitachi Crankshaft Position Sensor - BMW N20 N26 2.0L

T#:48815475

Part#: 13627595860

Back Ordered

$ 68.99 USD

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$ 68.99 USD

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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.

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Hitachi Crankshaft Position Sensor - BMW M52 S52 M54

T#:48815470

Part#: 12141709616

Back Ordered

$ 32.99 USD

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$ 32.99 USD

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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.

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