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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Part no. 8779030

BMW G30 G31 Body Control Comfort Module Unit FEM ECU V05 8779030

€569.95

Free delivery - Wed, Dec 24

If paid before 14:00

Part no. A0009062822

Alternator Generator Mercedes W207 W212 W906 Engine Diesel 200A 14V LRA03818

€89.95

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Part no. A2078201989

Mercedes-Benz W207 A207 Radio Aerial Antenna Amplifier Module Unit A2078201989

€28.95

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Part no. 8678964

BMW X1 F48 Mini Cooper F55 F56 Engine Gearbox Module Wiring Cable Loom 8678964

€23.95

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Part no. 6933267

BMW 7 Series E65 E66 E67 Control Unit Door Front Passenger Side 6933267

€23.95

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Part no. 8517862-5

BMW F10 F20 F30 520d 120d 320d N47N 184HP Engine Unit ECU DDE 8517862 Automatic

€56.95

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VW Tiguan 5N Antenna Amplifier Module Control Right O/S Unit 5N0035552K

-5%

Part no. 5N0035552K

VW Tiguan 5N Antenna Amplifier Module Control Right O/S Unit 5N0035552K

Promo price

€23.95

€22.75

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Part no. 6972611

BMW 5 Series E60 E61 Wiring Rear Left Right Door Cable Harness N/O/S 6982362

€23.95

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Part no. A1635402333

Mercedes-Benz M ML W163 Centre Console Wiring Harness Cable Loom A1635402333

€23.95

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Part no. 2100493N

Audi A5 8T Seat Cable Front Left Right N/O/S Wiring Loom Harness 2100493N

€23.95

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Part no. 3D0937576

VW Volkswagen Phaeton 3D Main Fuse Socket Electrical Control Unit 3D0937576

€23.95

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Part no. 5WA962133E

Volkswagen Golf 5G Keyless Entry Module Aerial Antenna 5WA962133E

€32.95

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Part no. A1729008500-3

Mercedes W166 W204 Display Screen Information Navigation Dashboard A1729008500

€37.95

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Part no. A1775405501

Mercedes W177 Door Harness Loom Cable Wiring Rear Left Right N/O/S A1775405501

€23.95

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Part no. 8370933

BMW 3 5 6 Series E60 E61 E63 E90 Support Bracket Navigation Computer 8370933

€23.95

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Part no. A0009061004

Mercedes W213 C238 C257 Parking Brake Actuator Motor A0009061004

€56.95

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Audi A4 B8 Door Module Front Left N/S Control Unit Module ECU 8K0959792J

-5%

Part no. 8K0959792J

Audi A4 B8 Door Module Front Left N/S Control Unit Module ECU 8K0959792J

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€23.95

€22.75

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If paid before 14:00

Part no. 8506438-1

BMW E81 E87 LCI E90 E91 120d 320d N47 177HP ECU KIT DDE 8506438 CAS 3 Key

€189.95

Free delivery - Wed, Dec 24

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Part no. 6927705

BMW 5 Series E60 E60N E61 E61N Battery lead positive underfloor 80 MM² AL petro

€66.95

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Part no. 3412336

BMW X3 E83 Battery Cable Negative Wiring 3412336

€23.95

Free delivery - Wed, Dec 24

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Audi A5 8T Antenna Aerial Amplifier Module Control Unit 8T0035225J

-5%

Part no. 8T0035225J

Audi A5 8T Antenna Aerial Amplifier Module Control Unit 8T0035225J

Promo price

€23.95

€22.75

Free delivery - Wed, Dec 24

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Part no. 7L5937049AA

Porsche Cayenne 955 Comfort Control Unit Module ECU 7L5937049AA

€66.95

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Part no. 8W0959592E

Audi A4 B9 Front Door Control Module Unit Passenger Side ECU 8W0959592E

€42.95

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Part no. A2710106644-1

Mercedes R171 SLK200 M271.944 163HP Engine Control ECU A2710106644 Automatic

€151.95

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Part no. 9187647

BMW E82 E90 E92 LCI Antenna Amplifier Diversity 9187647

€89.95

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Part no. 8621486

BMW F20 F21 LCI F36 F87 M2 N55 Cable Alternator Starter Base B Wiring 8621486

€37.95

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Part no. 3414122

BMW X3 E83 Sensor Air Module Front Impact Crash Sensor 3414122

€23.95

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Part no. 5QS919298

Audi A3 S3 8Y VW Caddy SB Mk4 Parking Sensor Module Control Unit 5QS919298

€161.95

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Part no. A2469004519

Gearbox Module Mercedes W176 W246 Control Unit ECU Automatic A2469004519

€56.95

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Part no. A2218201811-2

Mercedes W221 Bluetooth Hands Free Mobile Phone Adapter Connector A2218201811

€56.95

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Part no. 7801711-1

BMW X3 E83 2.0d M47N2 Engine Control Unit Module ECU DDE 7801711 Manual

€227.95

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Part no. 6948689

BMW E60 E61 E63 Driver Side Door Air Module Control Unit Module 6948689

€23.95

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Part no. 6799677

BMW F11 Touring Rear Axle Air Suspension Control Unit ECU Module 6799677

€23.95

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Part no. A9079051202

Mercedes Sprinter W907 Battery Wire Negative Lead Cable A9079051202

€28.95

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Part no. A2079059702

Mercedes-Benz W207 A207 Radio Aerial Antenna Amplifier Module Unit Right O/S

€23.95

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Part no. A1694710141

Mercedes W169 W245 Fuel Pump Cable Harness Bracket Mount Trim A1694710141

€23.95

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Part no. 6911003

BMW 1 3 X1 X3 X5 X6 SERIES E81 E82 E84 E87 E88 E90 Accelerating Sensor 6911003

€23.95

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Part no. 7556846

Battery Cable BMW E82 E90 E91 E92 N54 Alternator Starter Base B Cable 7556846

€32.95

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Part no. 5Q0955559C

Volkswagen Golf 8 Rain Sensor Front Windscreen 5Q0955559C

€23.95

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Part no. A2601503100

Mercedes W177 M260 Petrol Engine Wiring Cable Loom Harness A2601503100

€189.95

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Part no. 06J906026AR

Volkswagen Scirocco Mk3 2.0 TFSI CAWB 200HP Control ECU Kit 06J906026AR Manual

€284.95

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Part no. 9176194

Mini Cooper R57 R58 R59 Radio Aerial Antenna Amplifier FM 9176194

€23.95

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Part no. 296B20856R

Smart ForTwo C453 Bonnet Hood Opening Release Sensor 296B20856R

€32.95

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Part no. A2479003506

Mercedes W177 Front Seat Module Control Unit Memory Driver's Side A2479003506

€203.95

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Part no. A0009050410

Mercedes W176 W205 C207 W212 Front Radar Distance Sensor Unit Module A0009050410

€142.95

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Part no. 9811783

Mini Cooper Paceman R61 Wiring Loom Harness Front Cable 9811783

€23.95

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Part no. 5QS907338B

Audi A3 S3 8Y Headlight Head Light Lamp Range Control Unit Module ECU 5QS907338B

€94.95

Free delivery - Wed, Dec 24

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Audi A8L 4H Ignition Keyless Entry Reader Coil Module 4H0909131

-5%

Part no. 4H0909131

Audi A8L 4H Ignition Keyless Entry Reader Coil Module 4H0909131

Promo price

€23.95

€22.75

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Ford Transit Connect Door Module Front Right O/S Control Unit ECU DV6T14B531BD

-5%

Part no. DV6T14B531BD

Ford Transit Connect Door Module Front Right O/S Control Unit ECU DV6T14B531BD

Promo price

€23.95

€22.75

Free delivery - Wed, Dec 24

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Part no. 8518424-1

BMW F20 F30 118d 318d N47N 143HP Engine Control Unit ECU DDE 8518424 Manual

€108.95

Free delivery - Wed, Dec 24

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Part no. A2518703390

Mercedes W251 Rear Passengers Entertainment Control Unit A2518703390

€70.95

Free delivery - Wed, Dec 24

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Part no. A2225403150

Fuse Box Mercedes W205 Front Passenger Side Footwell Fuse Box A2225403150

€23.95

Free delivery - Wed, Dec 24

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Part no. 9364636

Body Domain Controller Mini F54 F55 F56 F60 ECU BDC Control Unit Module 9364636

€165.95

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Part no. A2475457300

Mercedes W177 Fuse Box Relay Cover Lid Control Unit Bracket Trim A2475457300

€23.95

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Part no. A9078200301

Mercedes W907 Radio Professional System Controller Head Unit A9078200301

€180.95

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Fuse Box Grouping BMW F10 F11 Fuse Placement Map Card Diagram 9257426

-5%

Part no. 9257426

Fuse Box Grouping BMW F10 F11 Fuse Placement Map Card Diagram 9257426

Promo price

€23.95

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Part no. 8677247-1

Mini Countryman F60 Cooper Cable Alternator Starter Wire 12428677247 8677247

€23.95

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Part no. 6977982

Mini Cooper R50 R56 R57 R60 Relay No Contact Taubenblau 6977982

€23.95

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Part no. 31327066

Starter Motor Volvo S40 V70 XC90 Diesel Engine Actuator Motor 31327066

€28.95

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Mercedes W204 W221 Distributor Box Block Control Unit Relay A0045467540

-5%

Part no. A0045467540

Mercedes W204 W221 Distributor Box Block Control Unit Relay A0045467540

Promo price

€23.95

€22.75

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Part no. 8507924

Gearbox Wiring BMW F20 F30 125d 325d N47S1 Engine Loom Harness Cables 8507924

€56.95

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Part no. A4479001118

Mercedes W447 Front Air Module Control Unit ECU A4479001118

€488.95

Free delivery - Wed, Dec 24

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Part no. 6916565

BMW 5 X5 Series E38 E39 E53 Hands-free Electronics Charging Module MOTOROLA

€23.95

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Part no. 3Q0941329

Volkswagen Skoda Seat Audi Diesel Engine Adblue Module Control Unit 3Q0941329

€23.95

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Part no. 8606306-6

BMW F30 320i N20 184HP ECU Kit Engine Control Unit DME 8606306 Key FEM Automatic

€569.95

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Part no. 9244144

BMW E82 E88 E92 E93 LCI Accelerating Sensor 9244144

€51.95

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Part no. A2055408104

Battery Cable Mercedes W205 X253 Diesel OM651 Alternator Wiring A2055408104

€28.95

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Part no. A6512012009

Alternator Support Bracket Mercedes W212 OM651 Belt Tensioner Holder A6512012009

€23.95

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Part no. 6819333

BMW F30 Rear Body Control Unit Module V2 6819333

€32.95

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Part no. A2139004625

Mercedes W213 C238 C253 C257 Air Module Control ECU Sensor A2139004625

€75.95

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Part no. 059971627D

Audi A6 C7 High Pressure Pump Fuel Line Electrical Wiring Harness 059971627D

€23.95

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Part no. A2139008530

Mercedes W213 W447 Transmission Gearbox Control Unit Module ECU A2139008530

€47.95

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Part no. 9264568

BMW E92 LCI Body Control Module Unit PL2RR JBBFE IIIR L1 9264568

€23.95

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Part no. F1FT10C679BA

Ford Transit Mk7 V Negative Battery Terminal Cable Wiring F1FT10C679BA

€23.95

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Part no. 8507981

BMW F07 GT F10 F11 Engine Wiring Loom Harness Cables M57Z Diesel 8507981

€184.95

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Part no. 6927572

BMW X3 E83 Z4 E85 Wiring Seat Occupancy Cable 6927572

€23.95

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Part no. 8T0907468AD

Audi A4 B8 Gateway Interface Control Unit Module ECU 8T0907468AD

€28.95

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Part no. 6970086

BMW 5 6 Series E60 E61 E63 LCI Cable Set Start / Stop Switch Wiring Loom 6970087

€23.95

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Part no. 3B0035711B

Seat Leon Mk3 5F Hands Free Microphone Module Speaker Wiring Loom 3B0035711B

€23.95

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Part no. 4H0971365J

Audi A8 D4 Seat Cable Front Left Right N/O/S Seatbelt Warning Wiring 4H0971365J

€23.95

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Part no. 8571350

BMW 1 5 Series F10 F11 F20 F21 LCI B47 Starter Acoustic Vibration Plug 8571350

€23.95

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Part no. 8507202

BMW E90 E91 LCI 318d N47N 143HP ECU Engine Control Unit DDE 8507202 Manual

€61.95

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Part no. 6923502

Mini R50 One D Diesel W17 Cable Starter Base B- Wire 6923502

€23.95

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Part no. A1715450701

Mercedes SLK R171 Rear SAM Control Unit Module Relay Fuse Box A1715450701

€99.95

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Part no. 03L903023L

Audi A3 8V Diesel Engine Starter Alternator Electrical 14V 140A 03L903023L

€47.95

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Part no. 6858698

BMW F20 F21 F22 F30 F31 ECU ICM Plus Control Unit Module 6858698

€23.95

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Part no. 7L0915138C

Audi Q7 4L Battery Mounting Bracket Part Holder 7L0915138C

€23.95

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Part no. 6968652

BMW 3 Series E93 E93N LCI Aerial Antenna AM / FM Right O/S 6968652

€23.95

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Mini F54 Clubman F60 Countryman KaFAS Camera Windscreen Unit Front 9384100

€42.95

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BMW E61 E92 F32 LCPA Seat Belt Control Module ECU 9129439

€23.95

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Part no. 6957123

BMW 3 Series E92 Front Left N/S Door Wiring Cables Harness Loom 6957123

€23.95

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Part no. 7796892

BMW E60 E61 X3 E83 X5 E70 X6 E71 Starter Motor Diesel 7796892

€23.95

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Mercedes W177 Crash Impact Sensor Front Door Left Right Unit A1679050700

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Part no. A1679050700

Mercedes W177 Crash Impact Sensor Front Door Left Right Unit A1679050700

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€23.95

€22.75

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Part no. 6938297

Flap System Motor BMW E81 E82 E87 LCI E88 Top Active Cooling Flap Unit 6938297

€23.95

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Part no. 9185474

Mini Cooper R60 R61 Antenna Aerial Diversity Trap Circuit 9185474

€23.95

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Part no. 6940623

BMW 1 3 Series E81 E82 E84 E87 E90 E91 PDC Parking Ultrasonic Sensor Quartz Blue

€23.95

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Part no. 03E906023Q

Skoda Fabia 5J 1.2 CGPA 69HP Engine Control Unit ECU Kit 03E906023Q Manual

€94.95

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Part no. 3D0919473

Volkswagen Touareg 7L PDC Parking Aid System Display Panel Unit 3D0919473

€23.95

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BMW 3 4 Series F80 M3 F82 M4 Control Unit Active Sound Design 2622362

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Showing 1783-1881 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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