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BMW Electrical Sensors, Switches, & Relays for BMW 5 Series E39 (1996-2003)

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

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Bosch Alternator - 120 Amp - E46, E39, Z3 2001-2005 (with factory Val...

T#:386207

Part#: AL0703X

Ships on Oct 22, 2026

$ 844.99 USD

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$ 844.99 USD

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120 amp Bosch alternator for many BMW 6 cylinders (see list below). Replaces stock Valeo alternator with rectangular plug on the back. Bosch is an original equipment supplier to BMW, and is the finest and most recognized German brand of alternator available. Buy only the best alternator for your BMW -- buy a Bosch alternator. Same as BMW part#1231751599.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their exacting assembly process and high level of durability you can expect a long service life from all Bosch products.

A refundable core charge must be applied to this alternator. Upon receipt of your rebuildable alternator core, you will be refunded the core charge.

This alternator has a rectagular connector on the back! Please check to ensure you are getting the correct alternator

This Bosch Alternator fits the following BMWs:
1998-2000 E39 5 Series 528i
2001-2003 E39 5 Series 525i & 530i
2001-2005 E46 3 Series 325i, 325Ci, 325xi - only for cars with M54 engine
2001-2005 E46 3 Series 330i, 330Ci & 330xi
2001-2002 Z3 Roadster Z3 2.5 liter
2003-2005 Z4 Roadster/Coupe Z4 2.5 liter & Z4 3.0 liter

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Starter Solenoid

T#:57231530

Part#: 12411427080

Special Order: No Guaranteed ETA

$ 78.99 USD

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$ 78.99 USD

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When you are at the track or gearing up for a weekend backroad drive, the last thing you need is a sluggish starter holding your BMW back.

Wiring Harness Engine Gearbox Module - E39

T#:39807

Part#: 12517516998

Ships in 8 Business Days

2% off MSRP $ 445.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 434.99 USD

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2% off MSRP

$ 445.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 434.99 USD

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Genuine BMW Wiring Harness, Engine Trans. Module -
This item fits the following BMW Chassis:
E39

Fits BMW Engines including:
M54

Wiring Harness - Engine Module - E39

T#:39592

Part#: 12511439175

Special Order: No Guaranteed ETA

3% off MSRP $ 765.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 745.99 USD

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3% off MSRP

$ 765.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 745.99 USD

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Genuine BMW Engine Wiring Harness, Engine Module -
This item fits the following BMW Chassis:
E39

Fits BMW Engines including:
M52

Genuine BMW Engine Oil Level Sensor - E38 E39

T#:359393

Part#: 12611406609

Back Ordered

Starting at $ 187.95 USD

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Starting at $ 187.95 USD

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This is the oil level sensor that installs into the bottom of the oil pan and controls the oil level warning light. We also recommend getting the oil level sensor o-ring.

When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

This item fits the following BMWs:
1997 E39 BMW 540i
1995-1997 E38 BMW 740i 740il 750il

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Crankshaft Pulse Generator - E39 540i, E53 X5, E38 740i

T#:14757

Part#: 12141433264

Special Order: No Guaranteed ETA

$ 115.99 USD

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$ 115.99 USD

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This is an OEM engine crankshaft position sensor that is mounted in the transmission bell housing. A faulty crankshaft sensor can be responsible for hard starting or long cranking times and overall poor driveability.

This item fits the following BMWs:
3/2000-2003 E39 BMW 540i
3/2000-2001 E38 BMW 740i 740il
2000-2003 E53 BMW X5 4.4i X5 4.6is

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Hella Oil Pressure Switch - M12x1.5

T#:591881

Part#: 12611710509

Special Order: No Guaranteed ETA

$ 7.99 USD

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$ 7.99 USD

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Leaking or malfunctioning oil pressure switches can be disastrous

Alternator

T#:56544002

Part#: 12317501690

Special Order: No Guaranteed ETA

$ 245.99 USD

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$ 245.99 USD

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Trust Febi Bilstein for clean power output and dependable performance every time you start your engine.

Crankshaft Sensor With Sealing Ring

T#:56507847

Part#: 12141709616

Special Order: No Guaranteed ETA

$ 14.99 USD

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$ 14.99 USD

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Keep your BMW’s engine management system operating at peak performance with this replacement crankshaft position sensor from Febi Bilstein.

Starter Motor

T#:56724716

Part#: 12412354693

Special Order: No Guaranteed ETA

$ 147.99 USD

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$ 147.99 USD

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This Febi Bilstein starter motor delivers the cranking performance your BMW needs for instant ignition response every time you turn the key.

Oil Temperature Sensor And Gauge Kit - Blue & Red - Multiple BMWs ...

10X Entries Into Our F80 M3 Sweepstakes

T#:401689

Part#: OILTEMPGAUGEBRKK

Back Ordered

Sale - Save 2% $ 196.99

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

$ 193.26 USD

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Sale - Save 2%

$ 196.99

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

$ 193.26 USD

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The EVO series from ProSport Gauges is an award winning, industry leading option for those looking to push their car's limits. They allowing you to monitor crucial engine functions in one quick glance with advanced precision. Featuring a dual color readout, you can customize your readout to your liking. Offering a user friendly readout with a digital reading in the center with a bar-graph style sweep around the gauge as well.

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

For vehicles with production date from 09/1998

5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

T#:35829319

Part#: 12147539166

Ships on Oct 14, 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.

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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Meyle Outdoor Temperature Sensor / Probe

5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

T#:579266

Part#: 3009190001

Back Ordered

$ 44.99 USD

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$ 44.99 USD

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Common fix for incorrect OBC temperature readings

URO - Camshaft Position Sensor - E46 323Ci, E46 325i, E39 528i, Z3 2....

2X Entries Into Our F80 M3 Sweepstakes

T#:33679726

Part#: 12147539165

Ships in 2 Business Days

$ 18.99 USD

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$ 18.99 USD

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URO Camshaft Position Sensor is a premium replacement component specifically designed for BMW vehicles, ensuring optimal engine performance and reliability. Manufactured by Turner Motorsport, this camshaft position sensor plays a crucial role in maintaining accurate timing and enhancing overall engine efficiency. By upgrading to the URO Camshaft Position Sensor, BMW owners can expect improved engine responsiveness and a significant reduction in potential diagnostic trouble codes.

Enhanced Engine Performance: Ensures precise timing and efficient engine operation, contributing to superior overall performance.
Durable Construction: Crafted from high-quality materials that withstand extreme conditions for long-lasting durability.
Easy Installation: Designed for a direct fit, facilitating straightforward installation for both professionals and DIY enthusiasts.
Reliable OEM Replacement: Matches OEM specifications, providing peace of mind and preserving the integrity of the vehicle.

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Re-manufactured Starter Motor - Priced Each

T#:3471789

Part#: 124123547095KT

Back Ordered

$ 346.99

This product was last offered at the strikethrough price on
04-09-2026

$ 340.99 USD

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$ 340.99 USD

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Price Included a $40.00 Core Charge

Bosch Remanufactured Alternator - 150amp

For vehicles with liquid cooled alternator and production date from 09/1998

T#:371081

Part#: 12317508054BOSKT

Back Ordered

$ 1,167.99

This product was last offered at the strikethrough price on
04-10-2026

$ 807.99 USD

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$ 807.99 USD

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Includes a $100.00 refundable core charge

FAE Oil Pressure Switch - M12x1.5

T#:377029

Part#: 12612367061

Back Ordered

$ 5.99 USD

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Qty

$ 5.99 USD

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Leaking or malfunctioning oil pressure switches can be disastrous

FAE Oil Pressure Switch - M12x1.5

T#:374049

Part#: 12617568480

Back Ordered

$ 7.99 USD

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$ 7.99 USD

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Leaking or malfunctioning oil pressure switches can be disastrous

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