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. AH22-14F041-BH

Land Rover Discovery 4 L319 Fuse Relay Box BCM AH22-14F041-BH

€108.95

Free delivery: Mar 6 – 11

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Part no. 9231515

BMW F31 Rear Antenna Aerial Amplifier AM/FM DAB 9231515

€66.95

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Part no. A2059002011

Mercedes W205 Rear Door Control Module Unit Right O/S ECU A2059002011

€47.95

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Part no. 9383181

BMW F20 F21 F22 F30 F31 F32 F36 Fuse Box Body Module Control Unit FEM 9383181

€123.95

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Part no. 6821407

High Voltage Cable BMW F45 Mini F60 Hybrid Harnes EDH 6821407

€37.95

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Part no. A1776203400

Mercedes W177 W247 Battery Bracket Mount Holder Support A1776265300

€23.95

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Part no. 9119058

BMW E81 E87 E90 E91 Airbag Control Unit ECU NO CRASH DATA 9119058

€23.95

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Part no. 7168154

Mini Clubman R55 LCI Wiper Motor Actuator Window Right Rear O/S 7168154

€23.95

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Part no. A2215408335

Mercedes W221 Door Harness Left Right N/O/S Rear Door Wiring Loom A2215408335

€28.95

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Part no. 8585933

Wiring Loom Harness BMW F20 F30 F36 LCI B47 Engine Gearbox Module 8585933

€123.95

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Part no. 6R0971235C

VW Volkswagen Polo 6R Negative Battery Terminal Cable Wiring 6C0971235A

€23.95

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Part no. 7600020-4

Mini Cooper R55 R56 N12 1.6 120HP Engine Control ECU Kit DME 7600020 Manual

€142.95

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Part no. 6940623-QB1

BMW E81 E82 E84 E87 E90 E91 PDC Park Sensor Ultrasonic Set x4 Quarz Blau - A18

€23.95

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Part no. 1K8971104S

Volkswagen Scirocco Mk3 Rear Number Plate Wiring Harness Cable Loom 1K8971104S

€23.95

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Part no. 9364729

Mini F55 F56 F57 Battery Cable Positive Wire Lead Cable Terminal 9364729

€32.95

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Part no. 7534705

Mini R50 R52 Ground Battery Cable Alternator Starter 7534705

€23.95

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Part no. A2239052400

Mercedes W177 W223 W247 Crash Impact Deployment Sensor Unit A2239052400

€28.95

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Part no. 6960308

BMW 1 Series E88 Convertible Rear Bumper FM Radio Aerial Antenna 6960308

€23.95

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Part no. 7P6971693A

Volkswagen Touareg 7P Door Harness Wiring Loom Rear Left Right N/O/S 7P6971693A

€28.95

Free delivery: Mar 6 – 11

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Part no. 6933270

BMW 7 Series E65 E66 E67 Control Unit Door Rear Driver Side 6933270

€23.95

Free delivery: Mar 6 – 11

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Part no. 282754515R

Smart Fortwo C453 Comfort Module Control Unit ECU 282754515R

€32.95

Free delivery: Mar 6 – 11

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Part no. A2465402610

Mercedes-Benz A B W176 W246 160 180 CDI Alternator Cable Loom Wire A2465402610

€23.95

Free delivery: Mar 6 – 11

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Part no. 8654632

BMW F40 F44 F45 Mini Cooper F55 F56 Engine Starter Motor Positive Battery Cable

€23.95

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Part no. 2K5971120H

VW Volkswagen Caddy Maxi 2K Front Door Panel Cable Harness Left N/S 2K5971120H

€23.95

Free delivery: Mar 6 – 11

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Part no. 9483018

F20 62560400

-€0.05

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Part no. 1Z0907115AF-1

Skoda Octavia RS II 2.0TFSI CCZA 200HP Engine Unit ECU Kit 1Z0907115AF Manual

€284.95

Free delivery: Mar 6 – 11

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Part no. CA6T-15K600-EA

Ford Fiesta Mk7 Body Control Module BCM Controller Unit ECU CA6T-15K600-EA

€23.95

Free delivery: Mar 6 – 11

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Part no. 9284976

BMW F13 F12 F06 Dashboard Display Central Information Display Monitor 9284976

€56.95

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Part no. 4K5971693AJ

Audi A6 C8 Door Wiring Harness Loom Rear Left Right N/O/S 4K5971693AJ

€94.95

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Part no. 4E0035061D

Audi A8 D3 Radio Audio Sound Amplifier Tuner Harman Becker 4E0035061D

€189.95

Free delivery: Mar 6 – 11

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Part no. A1698207526

Mercedes-Benz A B Class W169 W245 Door Control Unit Left N/S Rear A1698207526

€23.95

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Part no. A0005468502

Battery Cover Mercedes W205 W212 Battery Positive Pole Cover Red A0005468502

€23.95

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Part no. A2059006822

Module Mercedes W205 Relay Body Control Module Unit SAM BCM A2059006822

€28.95

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Part no. CPLA-11A059-AA

Range Rover L405 Starter Motor Heat Shield Plate Cover CPLA-11A059-AA

€23.95

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Part no. BJ32-971111-BB

Range Rover Evoque L538 Anti Theft Alarm Siren Wiring Cable BJ32-971111-BB

€28.95

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Part no. 6929557

Air Module BMW E65 E66 Driver's Seat Sensor Control Unit 6929557

€23.95

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Part no. 8512043

BMW 3 E90 E91 LCI 316d 318d N47N Engine Basic DDE 8512043 Control Unit Manual

€28.95

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Part no. A2139058101

Mercedes C118 C253 Rear Bumper Switch Sensor Module A2139058101

€56.95

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Part no. 7195197

BMW E88 Convertible Folding Top Roof ECU Module CVM Bracket Holder Mount 7195197

€23.95

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Part no. A2045401434

Mercedes W204 OM642 Alternator Starter Wiring Harness Cable A2045401434

€42.95

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Part no. A0045450405

Mercedes W169 W203 W639 W906 Relay 5-Pins Green Control Unit 12V A0045450405

€23.95

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Part no. A1765401602

Mercedes W176 Rear Bumper PDC Wiring Parking Sensor Loom Harness A1765401602

€42.95

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Part no. A1718201726

Mercedes SLK R171 Seat Heated Heating Control Unit Module ECU A1718201726

€37.95

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Part no. 02E911023L

Skoda Octavia II BKD 2.0 TDI Starter Motor 02E911023L

€42.95

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Part no. 02T911023S

Starter Motor Seat Ibiza 6J VW Volkswagen Polo 6R 1.2 Petrol Engine 02T911023S

€23.95

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Part no. 9247467

BMW E82 ECU Body Control Module Unit PL2RR JBBFE L1 61359247467 9247467

€23.95

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Part no. 0148459-PS

Mini Cooper One R50 Fuel Filler Cover Flap 0148459 Pure Silver - 900

€26.95

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Part no. 8576341-6

BMW F20 F21 F30 F31 116d 316d 116HP N47N ECU Kit DDE 8576341 + Key + FEM Manual

€284.95

Free delivery: Mar 6 – 11

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Part no. 3417586

Electronic Box BMW X3 E83 LCI 2.5si 3.0si N52N Control Unit Mount Holder 3417586

€23.95

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Part no. 8R0907468AE

Audi A5 8T 2.0 TDI Gateway Control Module Unit ECU 8R0907468AE

€99.95

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Part no. 9264917

BMW Z4 E89 Roadster Air Module Control Unit ECU 9264917

€23.95

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Part no. 03L911024B

Audi A6 C7 2.0 TDI CGLC Diesel Starter Motor 03L911024B

€23.95

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Part no. A1765406708

Mercedes W176 Door Harness Loom Cable Wiring Rear Left Right N/O/S A1765406708

€23.95

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Part no. A2465406607-1

Positive Cable Mercedes W176 W246 Battery Lead Plus Pole Red A2465406607

€23.95

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Part no. A1688200289

Mercedes W168 Antenna Amplifier Unit Roof Rear Rail A1688200289

€23.95

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Part no. 8W0937124A

Audi A4 B9 A5 F5 Q5 FY Fuse Box Control Module Relay Box 8W0937124A

€23.95

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Part no. 5Q0959595B

Audi A3 8V Rear Door Control Module Unit ECU Left Right N/O/S 5Q0959595B

€23.95

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Part no. 9366339

BMW G32 GT Door Wiring Harness Loom Cable Rear Left Right N/O/S 9366339

€28.95

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Part no. 8V4971029M

Audi A3 S3 8V Front Door Wiring Harness Loom Cable Driver Side 8V4971029M

€28.95

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Part no. 2447799

BMW M6 F13 X3 F25 F32 F33 Bluetooth Telematic Control Module Unit 2447799

€113.95

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Part no. 4G5971693

Audi A6 C7 4G Rear Door Card Harness Loom Cable Wiring Left N/S 4G5971693

€23.95

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Part no. 8K0959795F

Audi Q5 8R Rear Door Control Module Unit ECU Left Right N/O/S 8K0959795F

€23.95

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Part no. AA6T-18C815-GG

Ford Fiesta Mk7 Radio Stereo CD Player Head Unit Multimedia AA6T-18C815-GG

€56.95

Free delivery: Mar 6 – 11

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Part no. 4H0907637K

Audi A8L 4H Yaw Rate Domain Control Module Unit ECU 4H0907637K

€222.95

Free delivery: Mar 6 – 11

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Part no. AV6N-10C679-BF

Ford Focus Mk3 Negative Battery Terminal Cable Electrical Wiring AV6N-10C679-BF

€23.95

Free delivery: Mar 6 – 11

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Part no. A1698207426

Mercedes-Benz A B Class W169 W245 Door Control Unit Right O/S Rear A1698207426

€23.95

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Part no. 8639595

BMW F30 F31 F32 320i 420i N20 ECU Engine Control Unit DME 8639595 Automatic

€336.95

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Part no. 8590102

Alternator Cable BMW 5 G30 G31 G12 B57 Battery Wiring Alternator B+ 8590102

€32.95

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Part no. 9362848-1

Telematics Module BMW F20 F21 F30 F31 Bluetooth Teleservices GPS Unit 9342881

€23.95

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Part no. A0015467435

Battery Cover Mercedes W906 Battery Positive Pole Cover Red A0015467435

€23.95

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Part no. A2059001611

Mercedes W205 Door Module Front Right O/S Control Unit ECU A2059001611

€23.95

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Part no. A1648204326

Mercedes MLW164 Air Module Control Unit ECU Air Module Sensor A1648204326

€28.95

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Part no. 7928682

Radio Receiver BMW F40 F44 G20 G26 Radio Remote Control Unit 434 MHZ 7928682

€23.95

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Part no. 6960220

Airbag Module BMW E65 E66 Airbag A-Pillar Sensor Right O/S Control Unit 6960220

€23.95

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Part no. A2218207502

Mercedes W221 Front Centre Dashboard Speaker Logic 7 A2218207502

€32.95

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Part no. A2219000804

Parking Module Mercedes W221 W216 Sensor PDC Distance Control Unit A2219000804

€23.95

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Part no. 7222633

BMW E90 E91 LCI Flat Cable Wiring Wire CAS Start Stop ECU Loom 7222633

€23.95

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Part no. A1669005612

Door Module Mercedes ML W166 Rear Right O/S Door Control Unit A1669005612

€66.95

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Part no. 6778809-1

Mini Cooper One R55 R56 R57 Xenon Headlight Level Sensor 6778809

€23.95

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Part no. 9244417

Mini Navigation Head Unit R55 R56 R57 LCI R60 R61 CHAMP 2 Sat Nav DAB 9244417

€322.95

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Part no. 6977066

BMW X5 E70 Door Cable Harness Wiring 6977066 6937277

€23.95

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Part no. 9289212

BMW 1 2 3 5 Series F10 F20 F22 F30 Navigation Sat Nav Head Unit High 9289212

€142.95

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Part no. 6824383

BMW 1 2 3 4 Series F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM 6824383

€113.95

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Part no. 6788716

BMW 7 Series E65 E66 E67 Steering Column Control Unit CIM Module

€23.95

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Part no. 7075947-1

BMW 5 7 Series E60 E61 E65 E66 Front Left Seat Angle Adjustment Drive 7075947

€24.95

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Part no. 8K0959793

Audi A5 8T Door Module Control Unit ECU Front Driver's Side 8K0959793

€23.95

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Part no. 9124583-KAS

BMW E87 E90 Front Rear PDC Ultrasonic Parking Sensor Kaschmir Silver A72 9124583

€23.95

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Part no. A2479007708

Rain Sensor Mercedes C118 W177 W247 Front Windscreen Light Unit A2479007708

€23.95

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Part no. 8636070

BMW 3 F30 LCI 330e B48X Engine Gearbox Module Wiring Cable Loom Harness 8636070

€113.95

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Part no. 4H0951253A-2

Seat Skoda Audi VW Polo 6R Multi Use Control Relay 4 Pin 645 4H0951253A SET X3

€23.95

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Part no. A2661534079

Mercedes W169 A170 266.940 116HP Engine Control Unit ECU A2661534079 Automatic

€113.95

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Part no. 4E0910217C

Audi Q7 4L Front Camera FAS Lane Assistance Control Unit 4E0910217D

€56.95

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Part no. CK52-14A073-AC-1

Range Rover L405 Fuse Relay Box Housing Diesel CK52-14A073-AC

€23.95

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Part no. 7838113

BMW F06 S65 Engine DME Basic Control Module Unit ECU PL6 JBBFE III 7838113

€51.95

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Part no. 6807634

BMW X5 F15 F20 F30 SRS Air Module Bag Control Unit Module ECU 6807634

€28.95

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Part no. DW93-14A076-AA

Range Rover Evoque L538 Fuse Relay Box Battery Terminal DW93-14A076-AA

€37.95

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Part no. 9329703

BMW F20 F21 F30 F31 F32 Rear Body Control Unit Module REM 9329703

€23.95

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Part no. 6926433

BMW 1 3 Series E87 E90 E91 Mini R56 R57 Seat Control Unit Module Heating 6926433

€23.95

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Part no. 8510249

Engine Wiring BMW E90 E91 LCI N47N Loom Harness Cable Automatic Gearbox 8510249

€23.95

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Showing 2278-2376 of 13731 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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