BMW Electrical Sensors, Switches, & Relays for BMW 3 Series E46 (1999-2005)

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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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Battery Tender - Corporate Logo
T#:49892371
Part#: BTT0210128
In Stock at Vendor
9% off MSRP $ 64.99

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

$ 58.99 USD
Free Shipping on orders $49 and up
9% off MSRP
$ 64.99

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

$ 58.99 USD
Free Shipping on orders $49 and up
Bosch - Corporate Logo
T#:375327
Part#: 61131372626
In Stock at Vendor
$ 2.03 USD
Free Shipping on orders $49 and up
Performance Tool - Corporate Logo
T#:1809154
Part#: W5368
Ships in 2 Business Days
$ 13.68 USD
Free Shipping on orders $49 and up
A must for any toolbox.

Genuine BMW - Corporate Logo
T#:38666
Part#: 12147839167
Ships in 2 Business Days
30% off MSRP $ 87.99

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

$ 61.99 USD
Free Shipping
30% off MSRP
$ 87.99

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

$ 61.99 USD
Free Shipping


Genuine BMW Ping Sensor
This item fits the following BMW Chassis:
E46 M3,E85 Z4M,E46,E85 Z4,E86 Z4

Fits BMW Engines including:
S54


Bushing Contact With Wire Lead - Priced Each
2X Entries Into Our F80 M3 Sweepstakes 2X Entries For Our Spin To Win Sweepstakes!
URO - Corporate Logo
T#:14783536
Part#: 61130005199
In Stock
$ 3.99 USD
Free Shipping on orders $49 and up
Mishimoto - Corporate Logo
T#:51075090
Part#: MMIG-BMW-02
Ships in 4 Business Days
$ 72.99 USD
Free Shipping on orders $49 and up
The Mishimoto BMW Ignition Coil is built to handle the intense heat cycles found in BMW’s modern turbocharged and naturally aspirated engines.

Hitachi - Corporate Logo
T#:48850055
Part#: 12147518628
Ships in 3 Business Days
$ 71.99 USD
Free Shipping on orders $49 and up
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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SEG Automotive - Corporate Logo
T#:54851980
Part#: 12317519618
Ships on Dec 7, 2026
New Item
$ 503.99

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

$ 500.99 USD
Free Shipping on orders $49 and up
$ 500.99 USD
Free Shipping on orders $49 and up

SEG Automotive - Corporate Logo
T#:54851984
Part#: 12317541694
Ships in 2 Business Days
New Item
$ 521.99

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

$ 470.99 USD
Free Shipping on orders $49 and up
$ 470.99 USD
Free Shipping on orders $49 and up

Genuine BMW - Corporate Logo
T#:21280
Part#: 61138352304
In Stock
6% off MSRP $ 31.99

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

$ 29.99 USD
Free Shipping on orders $49 and up
6% off MSRP
$ 31.99

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

$ 29.99 USD
Free Shipping on orders $49 and up


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 - Corporate Logo
T#:140039
Part#: 61131383759
Ships in 3 Business Days
7% off MSRP $ 13.99

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

$ 12.99 USD
Free Shipping on orders $49 and up
7% off MSRP
$ 13.99

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

$ 12.99 USD
Free Shipping on orders $49 and up


Genuine BMW Plug-In Connection Bracket
This item fits the following BMW Chassis:
E46 M3,E46

Genuine BMW - Corporate Logo
T#:156198
Part#: 67138379003
Ships in 1-2 days
$ 52.99 USD
Free Shipping
$ 52.99 USD
Free Shipping


Genuine BMW Wiring Left -
This item fits the following BMW Chassis:
E46



Genuine BMW - Corporate Logo
T#:140848
Part#: 61138366275
Ships in 1-2 days
$ 11.99 USD
Free Shipping on orders $49 and up


Genuine BMW Universal Pin Terminal Uncoded - 2 Pol.
This item fits the following BMW Chassis:
E46,E63,E65,E82,E83 X3,E90,E92,E93

Washer
10X5,3X1-200 Hv
Genuine BMW - Corporate Logo
T#:215808
Part#: 07119904206
Ships in 1-2 days
$ 1.99 USD
Free Shipping on orders $49 and up
$ 1.99 USD
Free Shipping on orders $49 and up


Genuine BMW Washer - 07119904206

Genuine BMW - Corporate Logo
T#:38297
Part#: 12141402705
Ships in 1-2 days
$ 15.99 USD
Free Shipping on orders $49 and up


Genuine BMW O-Ring - 18X1,2
This item fits the following BMW Chassis:
E46 M3,E85 Z4M,E46,E85 Z4,E86 Z4

Fits BMW Engines including:
S54


Genuine BMW - Corporate Logo
T#:40132
Part#: 12521427222
Ships in 1-2 days
$ 4.99 USD
Free Shipping on orders $49 and up


Genuine BMW Socket Housing - 3 Pol.
This item fits the following BMW Chassis:
E39,E46,E53 X5,E82,E83 X3,E85

Fits BMW Engines including:
M54,M56,M62,N52N

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Genuine BMW - Corporate Logo
T#:6635769
Part#: 12317501690KT
Ships in 1-2 days
$ 779.99 USD
Free Shipping
$ 779.99 USD
Free Shipping
Genuine BMW - Corporate Logo
T#:40116
Part#: 12521309527
Ships in 1-2 days
2% off MSRP $ 46.99

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

$ 45.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 46.99

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

$ 45.99 USD
Free Shipping on orders $49 and up


Genuine BMW Protection Cap - Ds/Ms
This item fits the following BMW Chassis:
E30 M3,E39 M5,E46 M3,E30,E38,E39,E46,E53 X5 X5


Genuine BMW - Corporate Logo
T#:141099
Part#: 61138387546
Ships in 1-2 days
2% off MSRP $ 61.99

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

$ 60.99 USD
Free Shipping
2% off MSRP
$ 61.99

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

$ 60.99 USD
Free Shipping


Genuine BMW Base B+ - 2X
This item fits the following BMW Chassis:
E46 M3,E85 Z4M,E46,E85 Z4,E86 Z4

Genuine BMW - Corporate Logo
T#:540927
Part#: 61139277742
Ships in 1-2 days
$ 4.99 USD
Free Shipping on orders $49 and up
Fixing a faulty connection in your BMWs electrical system? This 10 pole socket housing is a Genuine BMW replacement.

Genuine BMW - Corporate Logo
T#:40049
Part#: 12517836378
Ships in 1-2 days
3% off MSRP $ 782.99

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

$ 762.99 USD
Free Shipping
3% off MSRP
$ 782.99

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

$ 762.99 USD
Free Shipping


Genuine BMW Wiring Harness, Engine Trans. Module
This item fits the following BMW Chassis:
E46 M3,E46

Fits BMW Engines including:
S54


BASIC COTROL UNIT DME
For vehicles with production date from 03/2003
Genuine BMW - Corporate Logo
T#:6683648
Part#: 12147561382
Ships in 1-2 days
3% off MSRP $ 1,891.99

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

$ 1,829.99 USD
Free Shipping on orders $49 and up
3% off MSRP
$ 1,891.99

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

$ 1,829.99 USD
Free Shipping on orders $49 and up
No core charge required
Genuine BMW - Corporate Logo
T#:113025
Part#: 51478206645
Ships in 1-2 days
$ 1.99 USD
Free Shipping on orders $49 and up


Genuine BMW Battery Wiring Cap
This item fits the following BMW Chassis:
E39 M5,E38,E39,E46

Genuine BMW - Corporate Logo
T#:206288
Part#: 61132359999
In Stock
$ 19.99 USD
Free Shipping on orders $49 and up
This is a Genuine BMW 2 pin connector that is used in many places by BMW.


Genuine BMW - Corporate Logo
T#:55281746
Part#: 125275WRKT
Ships in 3 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.
Genuine BMW - Corporate Logo
T#:140932
Part#: 61138371016
Ships in 1-2 days
$ 8.99

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

$ 5.99 USD
Free Shipping on orders $49 and up
$ 5.99 USD
Free Shipping on orders $49 and up


Genuine BMW Covering Base B+
This item fits the following BMW Chassis:
E46 M3,E53 48IS,E46,E53 X5,E65,E83 X3


Genuine BMW - Corporate Logo
T#:138290
Part#: 61126929313
Ships in 3 Business Days
6% off MSRP $ 49.99

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

$ 46.99 USD
Free Shipping on orders $49 and up
6% off MSRP
$ 49.99

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

$ 46.99 USD
Free Shipping on orders $49 and up


Genuine BMW Set Of Sealing Tapes For Wiring Grommet - 40Stk.X 5Mm
This item fits the following BMW Chassis:
E30 M3,E36 M3,E39 M5,E60 M5,E63 M6,E46 M3,E70 X5M,E71 X6M,E82 1M Coupe,E85 Z4M,E53 48IS,E30,E36,E38,E39,E46,E53 X5,E63,E65,E70 X5,E71 X6,E82,E83 X3,E85 Z4,E86 Z4,E89 Z4,E90,E92,E93,F01,F02,F06,F10,F12,F13,F25 X3,F30,F31,F32,F34,i3i12

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Genuine BMW - Corporate Logo
T#:154859
Part#: 65756938049
Ships in 1-2 days
2% off MSRP $ 223.99

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

$ 219.99 USD
Free Shipping
2% off MSRP
$ 223.99

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

$ 219.99 USD
Free Shipping


Genuine BMW Ultra Sonic-Module -
This item fits the following BMW Chassis:
E39,E46

Genuine BMW - Corporate Logo
T#:138369
Part#: 61126935983
Ships in 1-2 days
2% off MSRP $ 100.99

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

$ 98.99 USD
Free Shipping
2% off MSRP
$ 100.99

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

$ 98.99 USD
Free Shipping


Genuine BMW Wiring Drivers Side
This item fits the following BMW Chassis:
E46 M3,E46


Precision Raceworks - Corporate Logo
T#:38161695
Part#: 201-0360-RED
Ships in 10 Business Days
$ 5.99 USD
Free Shipping on orders $49 and up
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Red in color and 12 Gauge.
Precision Raceworks - Corporate Logo
T#:38161687
Part#: 201-0361-GRN
Ships in 10 Business Days
$ 3.99 USD
Free Shipping on orders $49 and up
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Green in color and 18 Gauge.

Precision Raceworks - Corporate Logo
T#:38161693
Part#: 201-0360-WHT
Ships in 10 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. White in color and 12 Gauge.

Precision Raceworks - Corporate Logo
T#:38161703
Part#: 201-0360-BLU
Ships in 10 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Blue in color and 12 Gauge.
Precision Raceworks - Corporate Logo
T#:38161692
Part#: 201-0360-YEL
Ships in 10 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Yellow in color and 12 Gauge.
Precision Raceworks - Corporate Logo
T#:38161711
Part#: 201-0360-BLK
Ships in 10 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Black in color and 12 Gauge.


Precision Raceworks - Corporate Logo
T#:38161710
Part#: 201-0362
Ships in 10 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Black in color and 18 Gauge dual wire.
Precision Raceworks - Corporate Logo
T#:38161698
Part#: 201-0360-ORG
Ships in 10 Business Days
$ 4.99 USD
Free Shipping on orders $49 and up
Upgrade any wiring system with this optimal solution, ensuring reliability and durability in any demanding automotive application. Orange in color and 12 Gauge.
Genuine BMW - Corporate Logo
T#:140933
Part#: 61138371017
Special Order: No Guaranteed ETA
$ 7.99 USD
Free Shipping on orders $49 and up


Genuine BMW Cover Base B+
This item fits the following BMW Chassis:
E46 M3,E53 48IS,E46,E53 X5,E65,E83 X3


Genuine BMW - Corporate Logo
T#:214193
Part#: 12317830791
Ships in 1-2 days
3% off MSRP $ 1,433.99

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

$ 1,388.99 USD
Free Shipping
3% off MSRP
$ 1,433.99

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

$ 1,388.99 USD
Free Shipping
Maintain reliable high-RPM electrical performance with a Factory OEM Genuine BMW Alternator. Tailored specifically for the high demand electrical requirements of the S54 engine, this 120-amp compact unit delivers consistent voltage under extreme driving conditions. Whether replacing a tired factory unit or performing preventive maintenance, this OEM alternator ensures precise fitment, original charging efficiency, and total peace of mind on the street or track.
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Oil Pressure Switch
5X Entries Into Our F80 M3 Sweepstakes 2X Entries For Our Spin To Win Sweepstakes!
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:5944185
Part#: 12618611273
Ships on Dec 4, 2026
$ 6.99 USD
Free Shipping on orders $49 and up
This Meyle Oil Pressure Switch is the ideal service replacement to keep your BMW or European powerhouse performing reliably on the street or track.
FAE - Corporate Logo
T#:596540
Part#: 13621739510
In Stock
$ 12.99 USD
Free Shipping on orders $49 and up
Monitors intake air temperature

SEG Automotive - Corporate Logo
T#:58965210
Part#: 0124.515.052
Ships on Dec 7, 2026
New Item
$ 485.99 USD
Free Shipping on orders $49 and up
A strong charging system keeps everything from your ignition to your stereo working at its best, and a failing alternator can undermine all of it.
SEG Automotive - Corporate Logo
T#:58965213
Part#: 0124.525.523
Ships on Dec 7, 2026
New Item
$ 495.99 USD
Free Shipping on orders $49 and up
Your BMW's charging system powers everything from ignition to infotainment, so a weak alternator affects the whole car.

SenCom - Corporate Logo
T#:59038384
Part#: 10171
Ships on Dec 7, 2026
New Item
$ 32.99 USD
$ 32.99 USD
SenCom's repair kit restores it with a 2-wire, 200mm pigtail of silicone-insulated copper-tin wire.

SEG Automotive - Corporate Logo
T#:58965212
Part#: 0124.525.561
Ships on Dec 7, 2026
New Item
$ 487.99 USD
Free Shipping on orders $49 and up
SEG Automotive, the company behind Bosch's starter motor and generator business, builds this brand-new 150-amp alternator with a freewheel pulley that smooths out belt loads for a quieter, longer-lasting accessory drive.
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Bosch - Corporate Logo
T#:386207
Part#: AL0703X
Ships on Dec 8, 2026
$ 844.99 USD
Free Shipping
$ 844.99 USD
Free Shipping
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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Bosch - Corporate Logo
T#:5774
Part#: AL0814X
Ships on Dec 8, 2026
$ 564.52 USD
Free Shipping
$ 564.52 USD
Free Shipping
Keep your BMW's electrical system delivering crisp, consistent power whether on the daily commute or at high load with the Bosch AL0814X Alternator. Built to manage the demands of performance driving and modern vehicle electronics, this 150 amp unit provides rock solid voltage stability across the full RPM range
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Bosch - Corporate Logo
T#:57231530
Part#: 12411427080
Special Order: No Guaranteed ETA
New Item
$ 78.99 USD
Free Shipping on orders $49 and up
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.
Starter Motor
10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!
Bremmen Parts - Corporate Logo
T#:55030826
Part#: 12412354693
Ships on Dec 15, 2026
New Item
Sale - Save 10% $ 129.99

This product was last offered at the strikethrough price on
11-07-2026

$ 116.99 USD
Free Shipping on orders $49 and up
Sale - Save 10%
$ 129.99

This product was last offered at the strikethrough price on
11-07-2026

$ 116.99 USD
Free Shipping on orders $49 and up