What is a car electrical system?

This is a set of components responsible for powering and controlling all electrical functions in the car – from engine starting to multimedia.

What is an alternator for in a car?

The alternator generates electrical current when the engine is running and charges the battery.

What is the difference between a starter and an alternator?

The starter motor is used solely to start the engine, while the alternator is responsible for generating energy while driving.

How to check if the battery is working?

Just measure its voltage – a healthy battery should have approximately 12.6 V at rest and maintain a voltage above 10 V during cranking.

What are the most common symptoms of car electrical failure?

Problems starting the engine, flashing warning lights, power windows not working or dimming lights.

Do electrical parts from one model fit another?

Sometimes yes, but the key is to match it by VIN or OEM number – this guarantees compatibility.

How often should you check your electrical system?

It is worth performing basic diagnostics (battery, alternator) at least once a year or before a long trip.

Automotive electrical systems

At Global Parts, we offer a wide selection of original used car parts, including automotive electrical systems for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Each of our car parts undergoes quality control to ensure you receive a top-quality product.

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BMW I01 F45 F46 Mini F55 F56 Parking Assistant PDC Control Unit Module 6861026

-5%

Part no. 6861026

BMW I01 F45 F46 Mini F55 F56 Parking Assistant PDC Control Unit Module 6861026

Promo price

€23.95

€22.75

Free delivery - Wed, Dec 24

If paid before 14:00

Part no. 9343687

BMW F01 LCI F07 F10 F11 F25 Safety Control Unit Air Module Bag ECU 9343687

€42.95

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Part no. 6864898

BMW F20 F21 F30 F31 Parking Assistant Control Unit Module 6864898

€32.95

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Part no. 95B837462B

Porsche Macan 95B Front Door Window Lifter Regulator Right O/S 95B837462B

€70.95

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Part no. 95504490277

Porsche Cayenne 955 Telematics Bluetooth Telephone Module Unit 95504490277

€56.95

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Part no. 5E0919605M

Skoda Octavia Mk3 5E Multifunction Display Screen Control Unit 5E0919605M

€332.95

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Audi A4 B9 Rear Door Control Module ECU Left Right N/O/S 8W0959595E

-5%

Part no. 8W0959595E

Audi A4 B9 Rear Door Control Module ECU Left Right N/O/S 8W0959595E

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€22.75

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Part no. 8573260-2

BMW F20 F21 116d ed Diesel N47N 116HP Engine Control Unit DDE 8573260 Manual

€47.95

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Part no. 9187011

BMW F01 F07 GT Console Lightning Centre LED Lamp Light Cable Wiring 9187011

€23.95

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Part no. 6864927

BMW F01 F02 LCI F06 F10 F11 F13 ECU ICM Control Unit Air Module 6864927

€23.95

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Part no. 8580389

BMW F40 F45 X1 F48 Mini F55 F56 F57 F60 Diesel Engine Starter Motor 8580389

€61.95

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Part no. A2139008330

Mercedes W177 W213 W247 Automatic Gearbox Control Unit Module ECU A2139008330

€94.95

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Part no. KV6T-14B060-AAF

Ford Transit Connect Battery Cable Engine Wiring Harness Loom KV6T-14B060-AAF

€37.95

Free delivery - Wed, Dec 24

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Part no. A2469009112

Control Unit Mercedes W176 W246 Body Control Module BCM ECU A2469009112

€44.95

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Part no. A2054402834

Mercedes W205 Parking Sensor Wiring Rear Bumper PDC Loom Cable A2054402834

€56.95

Free delivery - Wed, Dec 24

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Part no. A2205401124-1

Fuse Box Unit Mercedes CL S C215 W220 1 Front Right O/S ECU A2205401124

€23.95

Free delivery - Wed, Dec 24

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BMW X5 F15 Rear Fuse Box Distribution Relay Module Control ECU Unit 6819651

-5%

Part no. 6819651

BMW X5 F15 Rear Fuse Box Distribution Relay Module Control ECU Unit 6819651

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€23.95

€22.75

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Yaw Sensor Mercedes ML W164 W221 W251 ESP Rotation Rate Unit Module A0045423918

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Part no. A0045423918

Yaw Sensor Mercedes ML W164 W221 W251 ESP Rotation Rate Unit Module A0045423918

Promo price

€23.95

€22.75

Free delivery - Wed, Dec 24

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Part no. 8381020

BMW X5 Series E53 Drive For Window Lifter Front Right O/S 8381020

€28.95

Free delivery - Wed, Dec 24

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Part no. 9224686

BMW Mini Clubman R55 Cable Wiring Loom Splitdoor Door Rear Right O/S 9224424

€23.95

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Part no. A2469000012

Mercedes W176 W246 Radio Head Unit COMAND Navi Player Control Unit A2469000012

€80.95

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Part no. 8U0971104C

Audi Q3 8U Rear Bumper PDC Parking Sensor Wiring Harness Loom Cable 8U0971104C

€42.95

Free delivery - Wed, Dec 24

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Ford Transit Mk6 Starter Motor Battery Cable Loom Wiring Harness 3C1T-14A120-AA

-5%

Part no. 3C1T14A120AA

Ford Transit Mk6 Starter Motor Battery Cable Loom Wiring Harness 3C1T-14A120-AA

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€22.75

Free delivery - Wed, Dec 24

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Part no. 7605076

BMW F06 F10 F11 F12 F13 Wiring Harness Cable Engine Ignition Module N55 7605076

€75.95

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Part no. A2478207502

Mercedes C118 W177 W243 W247 Centre Console Dual USB-C Socket Ports A2478207502

€32.95

Free delivery - Wed, Dec 24

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Part no. 5N0035342E

VW Volkswagen Polo 6R Multimedia Electronic Control Interface Module 5N0035342E

€23.95

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Part no. 9127895

BMW E88 Convertible Antenna Aerial DAB Rear Trunk Tailgate 9127895

€37.95

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Part no. 3G0962243C

Volkswagen Seat Skoda Audi Tailgate Module Controller 3G0962243C

€32.95

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Part no. 05E972627B

Volkswagen Golf SV 1.5 TSI DADA Automatic Engine Wiring Harness 05E972627B

€108.95

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Mercedes W204 Battery Wiring Starter Alternator Wiring Harness A2044409005

-5%

Part no. A2044409005

Mercedes W204 Battery Wiring Starter Alternator Wiring Harness A2044409005

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€23.95

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Part no. 9119359

BMW E60 E61 E63 E81 E87 E90 E91 DAB Radio Tuner Module Unit 9119359

€23.95

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Part no. A2078202910

Seat Control Module Mercedes A207 W207 Cabrio Rear Control Unit ECU A2078202910

€28.95

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Starter Cover Mercedes W205 W212 W213 M276 Heat Plate Motor Shield A2761508800

-5%

Part no. A2761508800

Starter Cover Mercedes W205 W212 W213 M276 Heat Plate Motor Shield A2761508800

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€23.95

€22.75

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Part no. A6549061400

Starter Motor Mercedes W213 S213 W238 OM654 Diesel Engine Actuator A6549061400

€56.95

Free delivery - Wed, Dec 24

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Part no. A0005456616

Mercedes W212 Automatic Gearbox EGS Control Module Unit ECU A0005456616

€32.95

Free delivery - Wed, Dec 24

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Part no. A2229004220

Mercedes GLC X253 Communication Module LTE Telephone Bluetooth A2229004220

€189.95

Free delivery - Wed, Dec 24

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Part no. 9371790

BMW 1 Series F20 Telematics Control Unit Module Bluetooth 9371790

€56.95

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Part no. A2711508033

Mercedes W204 Engine Wiring Harness Cable Loom A2711508033

€313.95

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Part no. 8Z0951253

Skoda Octavia II 5 Pin Black Relay Control Module Unit Set Kit 8Z0951253

€23.95

Free delivery - Wed, Dec 24

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Part no. 3449686

Mini Cooper R55 R56 R57 Passive Go Module Control Unit 3449686

€23.95

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Part no. B67824524

Mercedes W164 Media Interface Connection Cable MI AUX Wiring B67824524

€23.95

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Part no. A2466200514

Mount Support Mercedes W176 Battery Bracket Holder A2466200514

€23.95

Free delivery - Wed, Dec 24

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Part no. 6867169

Air Module BMW F20 F23 F30 F32 F36 Domain Control Module ICM Unit 6867169

€28.95

Free delivery - Wed, Dec 24

If paid before 14:00

Mercedes W177 Rear Axle Wheel RPM Speed Right Sensor Wire Harness A2475400600

-5%

Part no. A2475400600

Mercedes W177 Rear Axle Wheel RPM Speed Right Sensor Wire Harness A2475400600

Promo price

€23.95

€22.75

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Part no. A2215402462

Mercedes W221 SAM Fuse Box Comfort Control Module Unit ECU A2215402462

€42.95

Free delivery - Wed, Dec 24

If paid before 14:00

Part no. 9252651

BMW 1 2 3 Series F20 F21 F22 F30 Radio Remote Control Receiver 868 MHZ 9252651

€23.95

Free delivery - Wed, Dec 24

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Part no. 6875997

ICM Control Unit BMW F01 F02 LCI F06 F10 F11 F13 ECU Module 6875997

€32.95

Free delivery - Wed, Dec 24

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Part no. 9209684

BMW F01 F02 F04 F07 ECU ICM Control Unit Air Module Bag 9209684

€23.95

Free delivery - Wed, Dec 24

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Part no. 6982402-1

Parking Control Module BMW E81 E84 E87 E90 E91 E92 E93 Unit PDC 6982402

€56.95

Free delivery - Wed, Dec 24

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Part no. 8579480-1

BMW F20 120d F30 320d F10 520d N47N 184HP Engine Control Unit DDE 8579480 Manual

€113.95

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Part no. A2139068701

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Fuse Unit A2139068701

€56.95

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BMW F40 Fuse Relay Power Distribution Box Unit 5A323C8

-5%

Part no. 5A323C8

BMW F40 Fuse Relay Power Distribution Box Unit 5A323C8

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€23.95

€22.75

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Part no. A2769007300-2

Mercedes R172 AMG SLC 43 276.822 Engine Control Module ECU Kit A2769007300

€455.95

Free delivery - Wed, Dec 24

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Part no. 7182396

BMW X5 E70 E90 E91 LCI Control Unit Xenon Adaptive Headlight 7189311

€51.95

Free delivery - Wed, Dec 24

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Part no. A2741501802

Mercedes W213 Engine Wiring Harness Cable Loom A2741501802

€180.95

Free delivery - Wed, Dec 24

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Part no. KV6T-11000-BC

Ford Transit Connect Starter Motor Engine 1.5 TDCI Diesel KV6T-11000-BC

€56.95

Free delivery - Wed, Dec 24

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Part no. 6927311

BMW E60 Front Seat Control Unit Module Controller ECU 6927311

€23.95

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Part no. A2469003114

Transmission Module Mercedes W176 W246 Control Unit ECU A2469003114

€42.95

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Part no. A1698209926

Mercedes W169 W245 ECU Air Control Unit Sensor Module A1698209926

€28.95

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Part no. 7795485

BMW X1 E81 E84 E87 E90 E91 Earth Cable Battery Cable 7795485

€23.95

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Part no. 9387626

Mini F54 F55 F56 F57 F60 Windshield Rain Light Solar Sensor 9387626

€23.95

Free delivery - Wed, Dec 24

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Part no. 9264636-1

BMW 1 3 4 F20 F30 F32 1 Driver Side Seat Wiring Loom Electric Harness 9339286

€23.95

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Part no. 9688268580

Citroen C4 Starter Motor Diesel Engine 1.6 HDI Actuator Unit 9688268580

€56.95

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Part no. A2049006003

Radio Player Mercedes W204 Audio 20 Navi CD Player Head Unit A2049006003

€218.95

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Part no. A4148200526

Mercedes Vaneo W414 Front Left Right Door N/O/S Control Unit Module A4148200526

€23.95

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Part no. 8V5971687Q

Audi A3 8V Door Wiring Harness Loom Rear Left Right N/O/S 8V5971687Q

€32.95

Free delivery - Wed, Dec 24

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Part no. 4F1971036A

Audi A6 C6 Front Passenger Door Wiring Left N/S Harness Loom Cable 4F1971036A

€23.95

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Part no. 6917557

BMW Z4 Z3 E36 E85 Module Radar Burglar Alarm Sensor 6917557 6963225

€23.95

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Part no. 6824116

BMW 3 F30 LCI 330e Hybrid High Voltage Battery Wiring Inverter Cable 6824116

€94.95

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Part no. 8Y0971036E

Audi A3 8Y Front Door Card Wiring Harness Loom Cable Passenger Side 8Y0971036E

€37.95

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Audi S3 8Y Sportback Rear Door Wiring Harness Loom Left Right N/O/S 8Y0971693D

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Part no. 8Y0971693D

Audi S3 8Y Sportback Rear Door Wiring Harness Loom Left Right N/O/S 8Y0971693D

Promo price

€23.95

€22.75

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Part no. 9261095

BMW 7 Series F01 F02 LCI Antenna Aerial Noise Suppression Filter 9261095

€23.95

Free delivery - Wed, Dec 24

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Part no. A1669000318

Mercedes-Benz A B Class W176 W246 Front Left N/S Door Control Unit Module ECU

€23.95

Free delivery - Wed, Dec 24

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Part no. 7266666

BMW F11 Touring Control Unit Rear Tailgate Boot Lid Function Module 7266666

€23.95

Free delivery - Wed, Dec 24

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Part no. 8576341

BMW F20 F21 F30 F31 118d 318d 143HP N47N Engine Control ECU DDE 8576341 Manual

€56.95

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Part no. A2049003211

Mercedes W204 Stereo Radio Autoradio CD Player Head Unit A2049003211

€47.95

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Part no. 9125237

CD Changer BMW X5 E70 X6 E71 Mini R55 R56 R57 6 Disc Changer Unit 9125237

€28.95

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Part no. 8K0959794A

Audi A4 B8 Door Module Rear Right O/S Control Unit Module ECU 8K0959794A

€23.95

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Part no. 7607705

Mini Cooper One R56 N16 Automatic Gearbox Basic Control Unit EGS 7607705

€90.95

Free delivery - Wed, Dec 24

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Engine Wiring BMW F20 F21 F30 F31 N13 Loom Module Harness Cable 7615305

-5%

Part no. 7615305

Engine Wiring BMW F20 F21 F30 F31 N13 Loom Module Harness Cable 7615305

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€23.95

€22.75

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Mercedes Sprinter W910 Fuel Tank Wiring Loom Cable Harness A9105400805

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Part no. A9105400805

Mercedes Sprinter W910 Fuel Tank Wiring Loom Cable Harness A9105400805

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€23.95

€22.75

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Audi A4 B8 Front Door Lock System Module Right O/S Control Unit ECU 8T0959792B

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Part no. 8T0959792G

Audi A4 B8 Front Door Lock System Module Right O/S Control Unit ECU 8T0959792B

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€23.95

€22.75

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Part no. 9290014

BMW X3 F25 Light Module Control Footwell ECU Unit FRM3 9290014

€108.95

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Vauxhall Opel Insignia A Diesel Crankshaft Level Sensor Wiring Loom 55571379

-5%

Part no. 55571379

Vauxhall Opel Insignia A Diesel Crankshaft Level Sensor Wiring Loom 55571379

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€23.95

€22.75

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Part no. 7555188

BMW 5 6 Series F10 F11 F12 F13 Control Unit Box Cover 7555155

€23.95

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BMW F01 Front Seat Control Unit Module ECU Left Temic 9221462

-5%

Part no. 9221462

BMW F01 Front Seat Control Unit Module ECU Left Temic 9221462

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€23.95

€22.75

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Part no. 3448466

Mini Cooper R55 R56 Control Unit Module Passive Go 3448466

€28.95

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Part no. A4535408304

Smart Fortwo C453 Front Bumper Wiring Parking Sensor Loom Harness A4535408304

€66.95

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Part no. A1664409735

Mercedes ML W166 Battery Cable Alternator Starter Motor Wiring A1664409735

€32.95

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Fuse Box Cover BMW X3 G01 X4 G02 Trim Panel Lid Housing Bracket 8632554

-5%

Part no. 8632554

Fuse Box Cover BMW X3 G01 X4 G02 Trim Panel Lid Housing Bracket 8632554

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€23.95

€22.75

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Part no. 8510221

BMW E90 E91 LCI E92 330d Diesel N57 Engine Control Unit DDE 8510221 Automatic

€113.95

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Part no. A6395450203

Mercedes-Benz Vito W639 Fuse Box Cover Cap Trim A6395450203

€23.95

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Part no. 9171217

BMW E93 ECU Body Control Module H1 PL2 JBBFE Junction Box 9171217

€37.95

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Part no. 8610635-3

BMW F20 F30 F31 120i 320i N20 184HP Engine Control Unit ECU DME 8610635 Manual

€237.95

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Part no. 6825541

BMW F20 F21 F22 F30 F32 Front Electronic Module Control Unit FEM 6825541

€99.95

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Part no. 8K0959793C

Audi A4 B8 Door Module Control Unit ECU Front Driver's Side 8K0959793C

€23.95

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Part no. A1779008206

Mercedes W177 Ambience Illumination Light Control Module Unit A1779008206

€37.95

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...

Showing 2179-2277 of 12041 products

Key components of vehicle electrical systems

Original electrical parts for popular car brands

A car's electrical system is a complex system responsible for many key functions—from engine starting to lighting and on-board electronics. Modern cars are equipped with increasingly advanced electrical solutions that not only improve driving comfort but also enhance safety. At the Global Parts automotive store you will find a wide range of used car parts , such as alternators, starters, batteries, control modules and other automotive electrical systems that perfectly fit BMW , Audi , Mercedes , Volkswagen , Mini and many others.

How does a car's electrical system work?

A car's electrical system is a complex system that consists of several key components that work together to ensure the vehicle's reliable operation:

Battery accessories – Includes clamps, cables, holders and other components necessary for battery installation and maintenance.

Electronic control modules and controllers – They control and manage the operation of various vehicle systems, such as the engine, air conditioning and ABS.
Alternators and generators – Responsible for generating electricity and charging the battery while the engine is running.
Parts for alternators and generators – Including voltage regulators, brushes and bearings that ensure proper operation of the alternator.
Starters – Key components of the starting system that enable the engine to be started.
Starter parts – Including bendixes, rotors and solenoids necessary for the proper operation of the starter.
Batteries – They store the electrical energy necessary to start the engine and power on-board systems.
Wires, harnesses and connectors – They transmit energy and electrical signals between various vehicle systems.
Fuses and fuse boxes – Protect the electrical system against overloads and short circuits.
Relays – They control the flow of current in individual electrical circuits of the vehicle. A functioning electrical system is the basis for the reliability of your car, regardless of operating conditions.

Key technical parameters of electrical systems

Each of these components has specific technical parameters that determine its compatibility with the vehicle. For example, alternators installed in mid-range cars (e.g., Volkswagen Passat B6) typically have a capacity of 90 A to 140 A, while luxury vehicles (e.g., Mercedes S-Class) require alternators with a capacity exceeding 180 A. Starter motors vary in torque and operating voltage – the standard is 12 V, while 24 V starters are used in heavy-duty vehicles.

Why is it worth taking care of your car's electrical system?

Regular maintenance and replacement of electrical system components is key to reliability and road safety. Faulty components can lead to:

Problems starting the engine.
Failure of safety systems such as ABS or airbags.
Decreased efficiency of on-board equipment, e.g. lighting or air conditioning. At the Global Parts store we offer original used car parts , which have undergone detailed quality tests, ensuring their full functionality.

Symptoms of electrical system disruptions

In practice, electrical faults manifest themselves in a variety of ways. Drivers most often notice: dimming lights when parked, difficulty starting the engine, a voltage drop on the on-board computer, or air conditioning malfunctions. The table below presents typical correlations:

Symptom	Possible cause	Item to check
Difficulty starting the engine	Worn out starter or battery	Starter motor, battery
Dimming the lights	Inefficient alternator	Alternator, voltage regulator
Electric windows not working	Damaged relays or harness	Relays, wires

How to choose the right parts for your electrical system?

When choosing parts for the electrical system, such as alternators, starters or control modules, it is worth paying attention to:

Vehicle-specific fit – Every car make and model requires specific specifications. At Global Parts, you'll find parts that perfectly fit BMW , Audi , Mercedes , Volkswagen , Mini, and many more .
Technical condition – All used parts we offer are thoroughly checked to ensure their reliability.
Technical parameters – For example, alternators should have appropriate current output, adapted to the needs of your vehicle.

Compatibility and fit

The selection of electrical parts is based primarily on OEM part numbers, but matching them to specific parameters is equally important, including current, voltage, and the number of connector pins. For example, the 120A alternator used in the Audi A4 B7 differs significantly from the 150A version installed in the Audi A6 C6 . Therefore, using manufacturer catalogs or providing the VIN makes finding the right component much easier.

Why choose used electrical parts?

Purchase of used car parts This solution allows you to combine savings with quality. Why choose it?

Lower costs – Used alternators, starters and other parts are cheaper than new ones, but offer the same high quality.
Ecology – You support recycling and reduce waste by choosing used car parts .
Wide range – We offer electrical parts for the most popular car brands, so you can easily find what you need.

How to take care of your car's electrical system?

To ensure your electrical system operates reliably for years, it is worth remembering a few rules:

Regularly check the battery condition and charge level.
Take care of your cables and connectors – corrosion or damage can lead to voltage drops and failures.
Monitor the operation of the alternator and starter – early detection of problems will help avoid more serious breakdowns. If you have any problems, you will find the right car parts at Global Parts that will help restore your vehicle to full working order.

Step-by-step control procedures

Measure the battery voltage with a multimeter – the resting value should be approximately 12.6 V.
Check the charging voltage with the engine running – the correct range is 13.8–14.5 V.
Assess the condition of the wires and terminals – lack of corrosion and a firm seat are essential.
If in doubt, check the quiescent current consumption – it should not exceed 0.05–0.08 A.

FAQ - Frequently asked questions about electrical systems in cars

Question	Answer
What is a car electrical system?	This is a set of components responsible for powering and controlling all electrical functions in the car – from engine starting to multimedia.
What is an alternator for in a car?	The alternator generates electrical current when the engine is running and charges the battery.
What is the difference between a starter and an alternator?	The starter motor is used solely to start the engine, while the alternator is responsible for generating energy while driving.
How to check if the battery is working?	Just measure its voltage – a healthy battery should have approximately 12.6 V at rest and maintain a voltage above 10 V during cranking.
What are the most common symptoms of car electrical failure?	Problems starting the engine, flashing warning lights, power windows not working or dimming lights.
Do electrical parts from one model fit another?	Sometimes yes, but the key is to match it by VIN or OEM number – this guarantees compatibility.
How often should you check your electrical system?	It is worth performing basic diagnostics (battery, alternator) at least once a year or before a long trip.

Summary: Automotive electrical systems at Global Parts Automotive Store

Automotive electrical systems are the foundation of the reliability and comfort of every modern vehicle. By choosing the right parts, such as alternators, batteries, and control modules, you can ensure your car's full operational efficiency. The Global Parts automotive store invites you to browse our wide selection of original used car parts . Whether you're looking for car parts for BMW , Audi , Volkswagen , Mercedes, Mini , or others, you'll find them at competitive prices. We strive to ensure every customer finds the right parts for their car, and if you have any questions or concerns about selecting the right components, we're happy to help! Please contact us – we're here to help! For more information and interesting facts, visit our automotive blog .

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