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. 95B919606E

Porsche Macan 95B MMI Multimedia Navigation Control Head Unit 95B919606E

PLN 1,424.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 6968836

BMW 1 Series e81 BODY CONTROL MODULE L2 61356968836 6968836

PLN 18.95

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Part no. 8513184-3

BMW X3 F25 20dX Diesel N47N 184HP Engine Module ECU DDE 8513184 Manual

PLN 189.95

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BMW Z4 E85 Roadster Starter Earth Ground Wire Cable 2.0 Petrol 7524715

PLN 237.95

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Part no. 9381101

BMW F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM 9381101

PLN 189.95

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Part no. A2129060005

Fuse Box Mercedes W212 Rear Relay Control Unit Electric Module SAM A2129060005

PLN 142.95

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Part no. A1729056500

Mercedes-Benz A B Class W176 W246 Aerial Antenna Cable A1729056500

PLN 42.95

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Part no. 1K0971228L

VW Golf MK5 6 Audi A3 8P Positive Battery Terminal Cable 1K0971228L

PLN 42.95

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Part no. 6824386

Fuse Box Unit BMW F20 F22 F30 F32 Module ECU Control FEM 6824386

PLN 379.95

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Part no. 02E911024M

Audi A3 8V 2.0 TFSI DJHA Starter Motor 12V 02E911024M

PLN 94.95

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Part no. A4709820700

Mercedes W470 Glow Plug Relay Module Unit A4709820700

PLN 94.95

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Part no. A2129001711

Mercedes W212 PDC Parking Distance Control Unit Module Sensor A2129001711

PLN 61.95

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BMW F10 F20 F30 N20 125i 328i 528i N20 Wiring Harness Engine Module 1 7641649

PLN 237.95

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Part no. 8J0035223E

Audi TT 8J Coupe Roadster Ultrasonic Sound Control Module ECU Unit 8J0035223E

PLN 151.95

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Part no. 3457434-3

Mini Cooper R55 R56 R57 LCI R60 Radio Boost CD Player Head Unit 3457434

PLN 1,234.95

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Part no. A2035409213

Mercedes W203 Door Wiring Harness Front Left Right N/O/S Wiring Loom A2035409213

PLN 70.95

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Part no. A6519007500-23

Mercedes W204 C207 W212 E250CDI OM651.924 204HP Engine ECU A6519007500 Automatic

PLN 85.95

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Part no. 4752820

Positive Cable BMW F20 F21 Under Bonnet Battery Wiring Loom 4752820

PLN 142.95

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Part no. 9329702

BMW F20 F30 F31 REM Rear Electronic Module Fuse Box Control Unit V3 9329702

PLN 65.95

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Part no. 8200663057

Renault Clio Alternator Mount Bracket Holder Carrier 8200663057

PLN 47.95

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Part no. 8380407-1

BMW X5 E53 Power Distribution Fusebox Cover Fuse Box 8380407

PLN 61.95

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Part no. 9811224

Mini Cooper One R55 R56 R57 Airbag ECU Control Unit Module 9811224

PLN 61.95

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Part no. 1J0927841

Audi Volkswagen Seat Skoda ESP Relay Unit Grey 444 1J0927841

PLN 42.95

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Part no. A2129009505

Mercedes W212 PDC Parking Distance Control Unit Module Sensor A2129009505

PLN 42.95

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Part no. A2059000219

Mercedes C117 W176 W205 Telematics Module Communication Control Unit A2059000219

PLN 94.95

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Part no. 7524118

BMW Z4 E85 M54 Roadster Wiring Loom Harness Engine Ignition Module

PLN 94.95

Free delivery - Tue, Nov 25

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Part no. 8582280

Engine Control ECU BMW F20 F21 116d N47N 116HP DDE 8582280 Manual Transmission

PLN 189.95

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Part no. 8S0963553D

Volkswagen Skoda Seat Audi Seat Pressure Sensor Front Passenger Side 8S0963553D

PLN 66.95

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Part no. 8806980

BMW i3 I01 LCI Door Wiring Cable Loom Harness Rear Left Right N/O/S 8806980

PLN 94.95

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Part no. 6911584

BMW E65 E66 Steering Wheel MFL Phone Switch Buttons Left N/S 6911584

PLN 56.95

Delivery - Tue, Nov 25

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Part no. A2129005300

Seat Module Mercedes W204 W212 Control Unit Front Left Right N/O/S A2129005300

PLN 237.95

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Part no. 6821407

High Voltage Cable BMW F45 Mini F60 Hybrid Harnes EDH 6821407

PLN 142.95

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Part no. A1679008311

Mercedes C238 Door Control Unit Module ECU Front Left N/S A1679008311

PLN 123.95

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Part no. 6863389

BMW F20 F21 F30 F31 ECU ICM Plus Control Unit Module Airbag 6863389

PLN 75.95

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Part no. A1679007012

Mercedes C118 W177 W247 Keyless Go Module ECU Entry Control Unit A1679007012

PLN 218.95

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Part no. A6512011909

Mercedes W212 OM651 Alternator Support Bracket Belt Tensioner Holder A6512011909

PLN 42.95

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Part no. 7804110

BMW 5 Series F10 F11 LCI Earth Cable Battery Cable 7804110

PLN 75.95

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Part no. 0AM911023T

Volkswagen Touran 1T 1.4 TSI Petrol Engine Starter Motor 0AM911023T

PLN 94.95

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Part no. 4L0907290

Audi Q7 4L Gateway Convenience Module Unit Control ECU 4L0907290

PLN 75.95

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Part no. 7835131

BMW E60 E61 LCI M5 E63 M6 Fuel Injection System Adapter Lead 7835131

PLN 42.95

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Part no. 9807756

Mini Cooper R60 Wiring Passenger Loom Front Door Cables Left N/S 9807756

PLN 46.95

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Part no. 4H0907508

Audi RS6 C7 Acceleration Engine Sensor Module Control Unit ECU 4H0907508

PLN 61.95

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Part no. 5Q0959393B

Audi A3 8V Front Door Control Module Unit Right O/S 5Q0959393B

PLN 61.95

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Part no. A0008201277

Mercedes-Benz W906 Light Repeater Lamp Wiring Loom A0008201277

PLN 42.95

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Part no. 1K0971235J

Audi A3 Volkswagen Golf Battery Wire Cable Negative Earth Lead 1K0971235J

PLN 42.95

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Part no. 9382516

PDC Module BMW F15 F16 F25 Mini F55 F56 Parking Assistant Control Unit 9382516

PLN 123.95

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Part no. 373004A310

Hyundai H-1 2.5 CRDI Alternator Generator 373004A310

PLN 142.95

Free delivery - Tue, Nov 25

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Part no. A2059068501-1

Fuse Box Mercedes W205 S205 W213 Fuse Box Front Relay Control Module A2059068501

PLN 94.95

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Part no. 6990090

BMW E61 E63 E90 E92 F06 Mini R55 R56 Trap Circuit Antenna 6990090

PLN 42.95

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Part no. 7M0951253A

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 7M0951253A

PLN 42.95

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Part no. 7510921

Mini R52 Cabrio Petrol W10 Engine Wiring Loom Harness Module 7510921

PLN 113.95

Free delivery - Tue, Nov 25

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Part no. 4G8959792A

AUDI A7 4G8 Door Control Module Front Right O/S Passenger Side 4G8959792A

PLN 42.95

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Part no. 8577243

BMW X3 F25 Battery Cable Wire Lead Positive Alternator Starter X4 F26 8577243

PLN 94.95

Free delivery - Tue, Nov 25

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Part no. A2701506733

Wiring Harness Mercedes W246 M270 Petrol Engine Wiring Harness Loom A2701506733

PLN 948.95

Free delivery - Tue, Nov 25

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Part no. 3C0907651

Volkswagen VW Golf Mk6 1K Acceleration Sensor 3C0907651

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 8J0971237A

Audi TT 8J Starter Motor Negative Battery Wiring Harness Cable 8J0971237A

PLN 61.95

Free delivery - Tue, Nov 25

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Part no. 6939287

BMW E60 E61 E63 Air Module ECU Control Unit Centre Vehicle Sensor 6939287

PLN 42.95

Delivery - Tue, Nov 25

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Part no. A9078200301

Mercedes W907 Radio Professional System Controller Head Unit A9078200301

PLN 569.95

Free delivery - Tue, Nov 25

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Part no. 6950525

BMW 3 6 Series E63 E64 E93 DWA Alarm System Module Unit 65756950525 6950525

PLN 42.95

Delivery - Tue, Nov 25

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Part no. A0035422819

Battery Relay Mercedes W176 W246 W447 Cut Off Module Control Unit A0035422819

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 5A923C4

BMW F40 G20 G21 G30 G31 X3 G01 HiFi Audio Sound Amplifier RAM Module 5A923C4

PLN 902.95

Free delivery - Tue, Nov 25

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Part no. 4K1907594CB

Audi S3 8Y VW Golf Mk8 Sun Roof Module Control Unit ECU 4K1907594CB

PLN 227.95

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Part no. A2125409110-1

Console Lightning Mercedes W212 Centre LED Selector Cable Wiring A2125409110

PLN 37.95

Delivery - Tue, Nov 25

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Part no. 8X0959793D

Audi A1 8X Driver Side Door Module Front Control Unit Module ECU 8X0959793D

PLN 61.95

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Part no. 8580192

Glow Plug Cable BMW G20 X3 G01 B47 Wiring Harness Engine Glow Module 8580192

PLN 237.95

Free delivery - Tue, Nov 25

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Part no. A6394460132

Mercedes Vito Viano W639 Side Sliding Door Control Unit Module A6394460132

PLN 949.95

Free delivery - Tue, Nov 25

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Part no. 7799470

Wiring Bracket BMW E60 E61 X3 E83 Diesel Engine Harness Cable Loom Mount 7799470

PLN 61.95

Free delivery - Tue, Nov 25

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Part no. 8387547

Fuse Box Base BMW X3 E83 Mini R50 R53 Battery Positive Cable B 8387547

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 1K0937132F

Vw Golf 5 Audi A3 8P Seat Leon 1P1 Fuse Box Cover Trim Panel Housing 1K0937132F

PLN 61.95

Free delivery - Tue, Nov 25

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Part no. 7160897

BMW X5 E53 E60 E61 E65 E81 E87 E90 E91 Turn Indicator Silver Bulb 7160897

PLN 42.95

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Part no. 9277818

Antenna Amplifier BMW F23 Cabrio FM Radio Booster Unit Module 9277818

PLN 51.95

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Part no. 9196669

CD Changer 6 Disc BMW E81 E87 E90 E91 E92 Without Magazine 9196669

PLN 113.95

Free delivery - Tue, Nov 25

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Part no. 3412336

BMW X3 E83 Battery Cable Negative Wiring 3412336

PLN 42.95

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Part no. 3451658

BMW 3 X3 Series E46 E83 LCI Earth Cable Flow Electric Battery Negative 6919584

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 8580059

Mini F56 F60 BMW F40 F39 Diesel B37 Battery Starter Alternator Wiring 8580059

PLN 70.95

Free delivery - Tue, Nov 25

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Part no. A2198203526

Mercedes CLS W219 Door Module Rear Left N/S Control Unit A2198203526

PLN 42.95

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Part no. 6950374

Door Cable BMW E65 Loom Rear Right O/S Wiring Harness 6950349

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 8576341-4

BMW F20 F21 F30 F31 118d 318d 143HP N47N ECU Kit DDE 8576341 + Key + FEM

PLN 949.95

Free delivery - Tue, Nov 25

If paid before 14:00

Part no. 9315096

BMW X3 F25 Rear Bumper PDC Wiring Loom Parking Sensor Cable Harness 9315096

PLN 123.95

Free delivery - Tue, Nov 25

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Part no. 9339825

BMW G11 G30 G31 Power Supply Module High Voltage Battery Terminal Point 9339825

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 5Q0919283B

PDC Module Audi A3 8V Seat Leon Skoda Octavia Parking Control Unit 5Q0919283B

PLN 42.95

Delivery - Tue, Nov 25

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Part no. 8P4963553

Audi A3 8P Front Seat Occupation Sensor Left Right N/O/S 8P4963553

PLN 75.95

Free delivery - Tue, Nov 25

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Part no. 8663284

BMW F20 F30 F31 LCI B38 ECU Basic DME Control Unit Automatic Gearbox 8663284

PLN 1,614.95

Free delivery - Tue, Nov 25

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Part no. 9395949-1

Radio Player Mini F54 F55 F56 Stereo Head Unit Module Alpine 9395949

PLN 474.95

Free delivery - Tue, Nov 25

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Part no. 8T0907468D

Audi A4 B8 A5 8T Gateway Diagnostic Interface Control Unit Module ECU 8T0907468R

PLN 94.95

Free delivery - Tue, Nov 25

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Part no. 3450435

Mini Cooper One R56 High SPEG H1 Fuse Distribution Box 3450435

PLN 189.95

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Part no. A2038000178

Mercedes-Benz C CLK Class W203 C209 Vacuum Solenoid Valve A2038000178

PLN 42.95

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Part no. 6C1T-14A076-BB

Ford Transit Mk7 Fuse Box Cover Electrical Unit Housing Trim Cap 6C1T-14A076-BB

PLN 61.95

Free delivery - Tue, Nov 25

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Part no. 6R0959655K

VW Volkswagen Polo 6R Air Module Bag Control Unit 6R0959655K

PLN 123.95

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Part no. 6917544

Mini Cooper R50 R53 Rear PDC Ultrasonic Parking Sensor Pepper White - 850

PLN 66.95

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Part no. 6940236

BMW E90 E91 E92 LCI AUX USB Lead Cable Wire 6940236

PLN 61.95

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Part no. A2128203785

Door Module Mercedes W204 W212 Front Right O/S Control Unit VST A2128203785

PLN 47.95

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Part no. 8P0906131A

Audi A3 8P Engine Unit Bracket ECU Module Holder Bracket Mount 8P0906131A

PLN 42.95

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Part no. A2125405710

Mercedes W212 PDC Wiring Parktronic Parking Sensor Cable Rear A2125405710

PLN 61.95

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Part no. 9114215

BMW 5 Series E60 E60N E61 E61N LCI Airbag ECU Control Unit Module

PLN 42.95

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Part no. 3455305

Mini R57 R57N R58 R59 DWA-Alarm System Relay ECU 3455305 65753455305

PLN 42.95

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Part no. A1698207526-1

Mercedes W169 W245 Door Control Unit Left N/S Rear A1698207526

PLN 42.95

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Part no. 8796289

BMW X3 G01 X4 G02 X5 G05 Battery Terminal Negative Cable Wire Wiring 8796289

PLN 123.95

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Part no. 6964140

BMW 7 Series E65 E66 Control Unit Door Rear Passenger Side 6933264

PLN 18.95

Delivery - Tue, Nov 25

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Showing 1882-1980 of 11506 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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