BMW Electrical Sensors, Switches, & Relays for BMW 7 Series E32 (1988-1994)

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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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ECS Heavy Duty Ground Cable Upgrade (12421737755) - E30, E36, E39, E4...
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ECS - Corporate Logo
T#:49996974
Part#: 059235LA01
In Stock
New Item
Sale - Save 20% $ 29.99

This product was last offered at the strikethrough price on
06-14-2026

$ 23.99 USD
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Sale - Save 20%
$ 29.99

This product was last offered at the strikethrough price on
06-14-2026

$ 23.99 USD
Free Shipping

If you're experiencing hard starting, flaky charging, or other electrical issues, your engine ground strap may be the culprit. On older BMWs, the engine ground strap is a thin, non-insulated cable that spans from the engine mount arm to the frame horn. Despite the seemingly simple nature of this part, on older cars, it is known to cause massive headaches. Due to its non-insulated design, years of exposure to water, dirt, and road salt will cause the wire to corrode, ultimately leading to complete failure. A break in this cable will cause an open circuit, resulting in issues with the vehicle's electrical system and potentially leading to a no-start condition.

To solve this issue, ECS has engineered an exact-fit, upgraded ground strap for your BMW! Unlike its OEM counterpart, this design features insulated, large-gauge copper wire for dependable conductivity and long-lasting durability. Additionally, factory-style lugs are zinc-coated, crimped, and soldered, ensuring protection against corrosion and oxidation.

Whether you're replacing a visibly corroded strap or proactively preventing failure, this solution from ECS is sure to provide lasting performance and protection.

FEATURES

Direct-fit replacement and upgrade for E30 (318i/is), E36, E39, E46, and others Solves intermittent grounding issues caused by aging OEM straps Clean, stealthy design that fits seamlessly in factory engine bays Factory length and lug orientation for drop-in fitment 2 AWG tinned copper cable for excellent conductivity and corrosion resistance Zinc-coated lugs, crimped and soldered to resist moisture and oxidation Black UL1015-grade insulation withstands oil, heat, and abrasion Discreet ECS label for a clean, OEM+ look Replaces OEM part numbers 12421737755 and 12421714262.

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Bosch Knock Sensor - E31, E32, E34, E38
For vehicles with a production date up to 05/1993
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Bosch - Corporate Logo
T#:579188
Part#: 261231074
In Stock at Vendor
$ 111.99

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

$ 108.00 USD
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$ 108.00 USD
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Controls the timing and air/fuel mixture of your engine
Bosch Alternator - 1993-1995 V8 - E34 530i/540i & E32 740i/740il ...
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Bosch - Corporate Logo
T#:1976
Part#: AL0742X
In Stock at Vendor
$ 475.99

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

$ 464.99 USD
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$ 464.99 USD
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Replacement Bosch alternator for the 1993-1995 V8 engine (M60), found in the E34 530i & 540i, and E32 740i/740iL (thru 1994). 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.

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 Bosch Alternator fits the following BMWs:
1994-1995 E34 5 Series V8 530i & 540i
1992-1995 E32 7 Series V8 740i & 740iL
1994-1995 E31 8 Series V8 840C/ 840i

Includes $65.00 core charge to be refunded on return of your rebuildable core.

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OMP Battery Cut Off Switch / Kill Switch
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OMP - Corporate Logo
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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Genuine BMW OEM Engine Crankshaft Position Sensor - E31 850Ci 850CSi ...
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Genuine BMW - Corporate Logo
T#:174334
Part#: 12141720291
Ships in 2 Business Days
6% off MSRP $ 203.99

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

$ 190.99 USD
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6% off MSRP
$ 203.99

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

$ 190.99 USD
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Genuine BMW PULSE GENERATOR
Fits BMW Engines including:
M70,S70

Genuine BMW Crash Alarm Relay - E32, Z3, E36, E31, E34
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Genuine BMW - Corporate Logo
T#:144148
Part#: 61358364691
Ships in 2 Business Days
3% off MSRP $ 144.99

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

$ 139.99 USD
Free Shipping
3% off MSRP
$ 144.99

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

$ 139.99 USD
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Genuine BMW Crash Alarm Relay
This item fits the following BMW Chassis:
E36 M3,E34 M5,E34,E36


Starter Solenoid
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Bosch - Corporate Logo
T#:596910
Part#: 12411726039
Ships in 1-2 days
$ 95.94 USD
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$ 95.94 USD
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Replacement Starter Solenoid from Bosch
Genuine BMW Engine Crankshaft Position Sensor - M30 3.0L 3.2L 3.4L ...
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Genuine BMW - Corporate Logo
T#:190830
Part#: 12141720857
Ships in 2 Business Days
6% off MSRP $ 200.99

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

$ 187.99 USD
Free Shipping
6% off MSRP
$ 200.99

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

$ 187.99 USD
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Genuine BMW Pulse Generator -
This item fits the following BMW Chassis:
E34

Fits BMW Engines including:
M30


Genuine BMW Flasher/Hazard Light Relay - Z3 M Roadster Z3 M Coupe Z3 ...
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Genuine BMW - Corporate Logo
T#:10637
Part#: 61361388533
Ships in 2 Business Days
3% off MSRP $ 149.00

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

$ 144.99 USD
Free Shipping
3% off MSRP
$ 149.00

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

$ 144.99 USD
Free Shipping


Genuine BMW Hazard Warning Relay
This item fits the following BMW Chassis:
E36 M3,E36


Genuine BMW Crankshaft Speed Sensor - 12141729292 - E38
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Genuine BMW - Corporate Logo
T#:179854
Part#: 12141729292
Ships in 2 Business Days
6% off MSRP $ 222.99

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

$ 208.99 USD
Free Shipping
6% off MSRP
$ 222.99

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

$ 208.99 USD
Free Shipping

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.


Genuine BMW Crankshaft Speed Sensor -
This item fits the following BMW Chassis:
E38

Fits BMW Engines including:
M60
 

 

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Genuine BMW Crankshaft Position Sensor Wire - E31 850Ci 850CSi E32 75...
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Genuine BMW - Corporate Logo
T#:187280
Part#: 12121725020
Ships in 3 Business Days
6% off MSRP $ 252.99

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

$ 236.99 USD
Free Shipping
6% off MSRP
$ 252.99

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

$ 236.99 USD
Free Shipping
Genuine BMW Pulse Generator
Fits BMW Engines including:
M70,S70

Genuine BMW Wiring-additional Alternator - 12511732156
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Genuine BMW - Corporate Logo
T#:39686
Part#: 12511732156
Ships in 8 Business Days
4% off MSRP $ 267.99

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

$ 257.99 USD
Free Shipping
4% off MSRP
$ 267.99

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

$ 257.99 USD
Free Shipping
This is the lower engine wiring harness which connects to the secondary alternator. If you are experiencing rough running conditions, failure to start, failure of the charging system or any other erratic electrical system behavior, it may be time to replace your engine wiring harnesses. Genuine BMW WIRING-ADDITIONAL ALTERNATOR Fits BMW Engines including: M70
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Bosch Starter Motor - E39 E38 E32 E34 X5 E53
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Bosch - Corporate Logo
T#:2024
Part#: SR0446X
Ships on Jul 23, 2026
$ 461.99 USD
Free Shipping
$ 461.99 USD
Free Shipping

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.

This genuine Bosch Starter motor fits the following BMWs:
1992-1994 E32 7 Series 740i, 740il
1993-1995 E34 5 Series 530i, 530i wagon, 540i
1995-2001 E38 7 Series 740i, 740il
1997-2003 E39 5 Series 540i M5
2000-2003 E53 X5 X5 4.4i X5 4.6is - M62 engine
2000-2003 Z8 Z8

 

Includes $100.00 core charge to be refunded on return of your rebuildable core.

 

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Voltage Regulator (Bosch Alternator) - 12311747920 - E34,E36,E36 M3 ...
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Bosch - Corporate Logo
T#:38940
Part#: 12311747920
Back Ordered
$ 217.00

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

$ 210.99 USD
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$ 210.99 USD
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This is the voltage regulator found on the back of the alternator. It's a normal wear item and the contacts are the first thing to check if you believe the alternator is not charging the battery (lights flickering or dim, battery light on in the dash, the engine quits without warning, or other electrical failures). The voltage regulator manages the voltage flowing through the car, especially to and from the battery. There are two carbon contacts on the regulator that control the magnetic field when the alternator is spinning and these contacts wear over time. There is a wear mark on the contacts and if the tip is within 3mm of this wear mark the regulator should be replaced, regardless if that is the cause of your electrical problems or not. Most older mechanics will tell you to keep a spare regulator in your toolbox.

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.

This is the OEM Bosch voltage regulator and will only fit Bosch alternators.
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Bosch Knock Sensor - E31, E32, E34, E38
From production date 04/1993
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Bosch - Corporate Logo
T#:13073
Part#: 12141702163
In Stock at Vendor
$ 78.99

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

$ 76.99 USD
Free Shipping
$ 76.99 USD
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Bosch BMW PING SENSOR:121060

Mass Air Flow Sensor (MAF)
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Genuine BMW - Corporate Logo
T#:367846
Part#: 13621702078
Ships in 2 Business Days
5% off MSRP $ 767.99

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

$ 728.99 USD
Free Shipping
5% off MSRP
$ 767.99

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

$ 728.99 USD
Free Shipping
The MAF (Mass Air Flow) sensor regulates the fuel flow through the injectors based on the intake air volume. If your vehicle displays a MAF code, it's crucial to replace it promptly to optimize gas mileage and performance. MAF failure often occurs gradually, leading to decreased fuel efficiency and compromised performance. When it fails completely, the vehicle may stutter and stall, entering a limp mode. A simple test involves unplugging the connector before starting the car. If the idle improves compared to previous poor idling, it's a sign that the MAF needs replacement. Neglecting this maintenance can lead to decreased fuel economy, as excessive fuel is injected into the engine without being efficiently burned. Opting for a genuine BMW replacement ensures stock-quality performance, offering your vehicle an efficiency boost.
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Cable Harness - E31, E32, E34
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Genuine BMW - Corporate Logo
T#:52323
Part#: 24637508670
Ships in 8 Business Days
4% off MSRP $ 260.99

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

$ 250.99 USD
Free Shipping
4% off MSRP
$ 260.99

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

$ 250.99 USD
Free Shipping


Genuine BMW Cable Harness -
This item fits the following BMW Chassis:
E34

Bosch Alternator - 115 Amp - E34 535i, E32 735i/IL
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Bosch - Corporate Logo
T#:224669
Part#: AL143X
Ships on Jul 23, 2026
$ 354.00 USD
Free Shipping
$ 354.00 USD
Free Shipping
115 amp Bosch alternator for many BMW M30 6 cylinder engines on E34 5 series and E32 7 series. 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. Can be used in place of bmw part number. 12311735704

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 Bosch Alternator fits the following BMWs:
1989-1993 E34 BMW 535i
1988-1992 E32 BMW 735i 735il
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