BMW Electrical Sensors, Switches, & Relays for BMW 3 Series E36 (1992-1998)

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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...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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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Hitachi Voltage Regulator - BMW E31 E32 E34 E36
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Hitachi - Corporate Logo
T#:48850064
Part#: 12311747920
Ships in 6 Business Days
New Item
$ 37.99 USD
Free Shipping on orders $49 and up
$ 37.99 USD
Free Shipping on orders $49 and up
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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Battery Tender Plus Advanced Battery Charging System
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Battery Tender - Corporate Logo
T#:49892371
Part#: BTT0210128
Back Ordered
New Item
$ 69.99 USD
Free Shipping on orders $49 and up

URO Engine Crankshaft Position Center - BMW
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
URO - Corporate Logo
T#:52621857
Part#: 12141709616
In Stock
New Item
$ 25.99 USD
Free Shipping on orders $49 and up
The URO Parts 020655 Crankshaft Position Sensor offers a cost-effective alternative to expensive OE components without sacrificing quality or longevity.

Wire Pinning Kit - MLK 1.2 Female Jack
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:55281746
Part#: 125275WRKT
Ships in 9 Business Days
New Item
$ 37.40 USD
Free Shipping on orders $49 and up
This Genuine BMW wiring repair kit is the ideal solution to refresh worn-out terminal connections in your Ultimate Driving Machine.
Morimoto Standalone Can-Bus Wiring Harness - H4 / 9003 - Priced Each ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Morimoto - Corporate Logo
T#:54388428
Part#: H240
Ships on Jul 24, 2026
New Item
Sale - Save 17% $ 21.99

This product was last offered at the strikethrough price on
06-23-2026

$ 18.21 USD
Free Shipping on orders $49 and up
Sale - Save 17%
$ 21.99

This product was last offered at the strikethrough price on
06-23-2026

$ 18.21 USD
Free Shipping on orders $49 and up

Camshaft Speed Sensor
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Bremmen Parts - Corporate Logo
T#:52832891
Part#: 12141743072
In Stock
New Item
Sale - Save 20% $ 39.99

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

$ 31.99 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 39.99

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

$ 31.99 USD
Free Shipping on orders $49 and up
Meyle Crank Position Sensor - E36, E34
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Meyle - Corporate Logo
T#:55497425
Part#: 3148998003
Special Order: No Guaranteed ETA
New Item
$ 25.99 USD
$ 25.99 USD
Don't let a basic sensor keep your E36 or E34 off the tarmac—swap in this high-quality Meyle unit and drive with confidence.

Hitachi Crankshaft Position Sensor - BMW M52 S52 M54
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Hitachi - Corporate Logo
T#:48815470
Part#: 12141709616
Back Ordered
New Item
$ 32.99 USD
Free Shipping on orders $49 and up
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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Hitachi Voltage Regulator - BMW E36 Z3 E34
For 80A Valeo alternators This part is for cars with 80A Valeo alternators
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Hitachi - Corporate Logo
T#:48850070
Part#: 12321739435
Back Ordered
New Item
$ 60.99 USD
Free Shipping on orders $49 and up
$ 60.99 USD
Free Shipping on orders $49 and up
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
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