BMW Electrical Sensors, Switches, & Relays for BMW E21 320i M10 1.8L

Genuine BMW 5 Prong Salmon Relay - Multiple BMWs

T#:5390

Part#: 12631742690

In Stock

7% off MSRP $ 24.65

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

$ 22.99 USD

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7% off MSRP

$ 24.65

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

$ 22.99 USD

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This relay is used for the SMG system on the E46 M3 and various applications including secondary air systems on other BMW's. If you find that your SMG-equipped E46 M3 is not starting, this is one of the first places to check as it controls power to the hydraulic unit (the car will not start without hydraulics). Buy one to fix the issue and buy a second so you're not stranded in the future!

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

T#:558037

Part#: B14115

Ships in 6 Business Days

$ 204.99 USD

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

T#:558038

Part#: B2015

Ships in 8 Business Days

$ 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

T#:558042

Part#: B3121

Ships in 7 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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Genuine BMW Oil Pressure Switch

T#:141613

Part#: 61311243414

Ships in 5 Business Days

Sale - Save 6% $ 27.99

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

$ 26.26 USD

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$ 27.99

This product was last offered at the strikethrough price on
06-25-2026

$ 26.26 USD

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Genuine BMW Oil Pressure Switch - M12X1,5

Genuine BMW Alternator Bushing (20 mm Length) - E10 E12 E21 E23 E24 E...

T#:22410

Part#: 12311268447

Ships in 5 Business Days

2% off MSRP $ 45.99

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

$ 44.99 USD

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2% off MSRP

$ 45.99

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

$ 44.99 USD

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Genuine BMW Bush - 90 Shore Lang

This item fits the following BMW Chassis:
E30 M3,E30

Fits BMW Engines including:
M10,M20,M30,S14,S38

Genuine BMW Socket repair kit

T#:207094

Part#: 61132359996

In Stock

Sale - Save 8% $ 29.99

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

$ 27.74 USD

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$ 29.99

This product was last offered at the strikethrough price on
06-15-2026

$ 27.74 USD

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Genuine BMW Rep. Kit For Socket Housing - 4 Pol.
This item fits the following BMW Chassis:
E46 M3,E46,E85 Z4,E90,F30,F31,F32,F33,F34,F36,F80 M3,F82 M4,F83

Genuine BMW Positive Battery Cable - E21 320i

T#:39337

Part#: 12421732447

In Stock

Sale - Save 6% $ 69.99

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

$ 65.88 USD

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Sale - Save 6%

$ 69.99

This product was last offered at the strikethrough price on
06-15-2026

$ 65.88 USD

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Genuine BMW BATTERY CABLE (PLUS POLE)

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

T#:558046

Part#: G30

Ships on Aug 5, 2026

$ 522.99 USD

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$ 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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Genuine BMW Alternator Brush Set

T#:7133

Part#: 12311727756

Ships in 5 Business Days

4% off MSRP $ 25.99

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

$ 24.99 USD

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4% off MSRP

$ 25.99

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

$ 24.99 USD

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Genuine BMW Carbon Brush Set

This item fits the following BMW Chassis:
E30 M3,E34 M5,E30,E34,E36

Fits BMW Engines including:
M10,M20,M30,M42,M50,M70,S14,S38,S70

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Genuine BMW Temperature Sensor

For vehicles with a production date from 09/1979

T#:200307

Part#: 13621362599

Ships in 5 Business Days

5% off MSRP $ 255.99

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

$ 241.99 USD

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5% off MSRP

$ 255.99

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

$ 241.99 USD

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Genuine BMW Temperature-Time Switch

Genuine BMW Alternator Bushing (Red) (8 mm Length) - E10 E12 E21 E23 ...

T#:22411

Part#: 12311268449

Ships in 7 Business Days

2% off MSRP $ 40.99

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

$ 39.99 USD

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2% off MSRP

$ 40.99

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

$ 39.99 USD

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Genuine BMW Bush - 90 Shore Kurz

Fits BMW Engines including:
M10,M20,M30

Supporting Bracket - E10, E21

T#:39076

Part#: 12318602032

Special Order: No Guaranteed ETA

4% off MSRP $ 82.99

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

$ 79.99 USD

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4% off MSRP

$ 82.99

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

$ 79.99 USD

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Genuine BMW SUPPORTING BRACKET

Fits BMW Engines including:
M10

Fan Wheel - E10, E12, E21, E23, E24, E28, E3, E9

T#:38759

Part#: 12311350199

Special Order: No Guaranteed ETA

4% off MSRP $ 53.99

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

$ 51.99 USD

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4% off MSRP

$ 53.99

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

$ 51.99 USD

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Genuine BMW FAN WHEEL

Fits BMW Engines including:
M10,M20,M30

Cloth Webbed Adhesive Tape - 7.5 Meters

T#:42873702

Part#: 61135B70D27

In Stock

Sale - Save 13% $ 11.99

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

$ 10.49 USD

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Sale - Save 13%

$ 11.99

This product was last offered at the strikethrough price on
06-25-2026

$ 10.49 USD

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Alternator / PS / AC Idler Nut

T#:7139

Part#: 12317677914

In Stock

$ 15.23 USD

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$ 15.23 USD

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GENUINE BMW ENGINE ELECTRICAL IDLER 12317677914

Repair Kit For Socket

T#:528834

Part#: 61132359992

Ships in 4 Business Days

Sale - Save 6% $ 13.99

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

$ 13.12 USD

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Sale - Save 6%

$ 13.99

This product was last offered at the strikethrough price on
06-25-2026

$ 13.12 USD

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Woodruff Key

4X5

T#:28561

Part#: 07119951453

In Stock

Sale - Save 26% $ 3.99

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

$ 2.96 USD

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Sale - Save 26%

$ 3.99

This product was last offered at the strikethrough price on
06-25-2026

$ 2.96 USD

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Genuine BMW Woodruff Key
This item fits the following BMW Chassis:
E30 M3,E70 X5M,E71 X6M,E53 48IS,E30,E34,E36,E53 X5 X5,E63,E65,E70 X5,E71 X6,F01,F02,F06,F10,F12,F13,F15,F16

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Genuine BMW Terminal Socket - Mcon 2.8 - Multiple BMWs

T#:40627

Part#: 12527567482

In Stock

Sale - Save 57% $ 1.99

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

$ 0.86 USD

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Sale - Save 57%

$ 1.99

This product was last offered at the strikethrough price on
05-02-2026

$ 0.86 USD

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Used in a wide variety of BMW connectors, these terminal sockets can come in handy when working on your wiring components.

Washer

10X5,3X1-200 Hv

T#:215808

Part#: 07119904206

Ships in 5 Business Days

$ 1.99 USD

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$ 1.99 USD

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Genuine BMW Washer - 07119904206

Genuine BMW 10 Pole Socket Housing - Multiple BMWs

T#:540927

Part#: 61139277742

Ships in 5 Business Days

$ 4.99 USD

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$ 4.99 USD

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Fixing a faulty connection in your BMWs electrical system? This 10 pole socket housing is a Genuine BMW replacement.

Washer - E12, E21, E23, E24, E28, E30

T#:38719

Part#: 12311268420

Ships in 5 Business Days

$ 10.99 USD

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$ 10.99 USD

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Genuine BMW Washer

This item fits the following BMW Chassis:
E30 M3,E30

Fits BMW Engines including:
M10,M20,M30,S14,S38

Genuine BMW Universal Socket Housing

T#:21280

Part#: 61138352304

Ships in 7 Business Days

3% off MSRP $ 28.99

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

$ 27.99 USD

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3% off MSRP

$ 28.99

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

$ 27.99 USD

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Genuine BMW Universal Socket Housing, Uncoded - 3 Pol.
This item fits the following BMW Chassis:
E36 M3,E34 M5,E39 M5,E60 M5,E46 M3,E70 X5M,E71 X6M,E82 1M Coupe,E53 48IS,E34,E36,E38,E39,E46,E53 X5,E65,E70 X5,E71 X6,E82,E83 X3,E89 Z4,E90,F01,F02,F06,F10,F12,F13

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Genuine BMW Electrical Connector Repair Kit - Multiple BMWs ...

T#:206288

Part#: 61132359999

Ships in 3 Business Days

$ 19.99 USD

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$ 19.99 USD

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This is a Genuine BMW 2 pin connector that is used in many places by BMW.

Genuine BMW Voice Recognition SES Adapter Plug - Multiple BMWs ...

T#:11467

Part#: 84110018038

In Stock

$ 6.99 USD

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$ 6.99 USD

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Adjusting Bar - E21

T#:7140

Part#: 12318602037

Special Order: No Guaranteed ETA

$ 35.99 USD

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$ 35.99 USD

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Genuine BMW ENGINE ELECTRICAL ADJUSTING BAR 12318602037.--

This item fits the following BMWs:
BMW 1600, 2002, 2002tii
BMW 3 Series - 320i

--.

Fits BMW Engines including:
M10

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Wire Pinning Kit - MLK 1.2 Female Jack

T#:55281746

Part#: 125275WRKT

Ships on Aug 4, 2026

$ 37.40 USD

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$ 37.40 USD

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This Genuine BMW wiring repair kit is the ideal solution to refresh worn-out terminal connections in your Ultimate Driving Machine.

Genuine BMW Engine Electrical Adjusting Bar 12311273638

T#:7122

Part#: 12311273638

Special Order: No Guaranteed ETA

2% off MSRP $ 48.99

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

$ 47.99 USD

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2% off MSRP

$ 48.99

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

$ 47.99 USD

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Genuine BMW ENGINE ELECTRICAL ADJUSTING BAR 12311273638.--

This item fits the following BMWs:
BMW 3 Series - 320i

--.

Fits BMW Engines including:
M10

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Project Cars

SELECT YOUR BMW

BMW Electrical Sensors, Switches, & Relays for BMW E21 320i M10 1.8L

Sub-Categories

Genuine BMW 5 Prong Salmon Relay - Multiple BMWs

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

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

Braille Lightweight Advanced AGM Battery - B3121 - 21lbs

Genuine BMW Oil Pressure Switch

Genuine BMW Alternator Bushing (20 mm Length) - E10 E12 E21 E23 E24 E...

Genuine BMW Socket repair kit

Genuine BMW Positive Battery Cable - E21 320i

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

Genuine BMW Alternator Brush Set

Genuine BMW Temperature Sensor

Genuine BMW Alternator Bushing (Red) (8 mm Length) - E10 E12 E21 E23 ...

Supporting Bracket - E10, E21

Fan Wheel - E10, E12, E21, E23, E24, E28, E3, E9

Cloth Webbed Adhesive Tape - 7.5 Meters

Alternator / PS / AC Idler Nut

Repair Kit For Socket

Woodruff Key

Genuine BMW Terminal Socket - Mcon 2.8 - Multiple BMWs

Washer

Genuine BMW 10 Pole Socket Housing - Multiple BMWs

Washer - E12, E21, E23, E24, E28, E30

Genuine BMW Universal Socket Housing

Genuine BMW Electrical Connector Repair Kit - Multiple BMWs ...

Genuine BMW Voice Recognition SES Adapter Plug - Multiple BMWs ...

Adjusting Bar - E21

Wire Pinning Kit - MLK 1.2 Female Jack

Genuine BMW Engine Electrical Adjusting Bar 12311273638

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