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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Products in promotion

Part no. A1669002906

Mercedes W204 Headlight Range Control Unit Module ECU A1669002906

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 06M907309H-1

Audi RS5 F5 2.9 TFSI DECA Quattro 450HP Engine Unit ECU Kit 06M907309H Automatic

€788.95

Free delivery - Tue, Jan 13

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Part no. MB3T-14B060-ABE-1

VW Volkswagen Amarok NF Engine Wiring Loom Harness Cable MB3T-14B060-ABE

€94.95

Free delivery - Tue, Jan 13

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Part no. 9677006780

Citroen Berlingo B9 1.6 HDI 9HN Engine Control Unit ECU EDC 9677006780 Manual

€32.95

Free delivery - Tue, Jan 13

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Part no. 8678960

Mini Cooper S F55 F56 F57 F60 Valvetronic Wiring Cable Loom Harness 8678960

€28.95

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Part no. 9291964

BMW 1 Series F20 Front Left Door N/S Wiring Loom Harness Cables 9291964

€23.95

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Part no. A2059051106

Mercedes W205 Antenna Aerial Amplifier Module Receiver AMP Unit A2059051106

€23.95

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Part no. A0009821012

Mercedes W166 W213 C238 Power Distribution Plate Control Unit Module A0009821012

€23.95

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Part no. A6395406809

Wiring Loom Mercedes W639 Vito Cable Door Wiring Cable A6395406809

€23.95

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Part no. 6863385

BMW F20 F21 F30 F31 ECU ICM Plus Control Unit Module Airbag 6863385

€28.95

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Part no. H1BB13D278AC

Ford Fiesta MK7 Front Headlamp DRL Light Lamp Control Unit Module H1BB-13D278-AC

€37.95

Free delivery - Tue, Jan 13

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Part no. 7848603

Alternator BMW F87 M2 F80 M3 F82 F83 M4 S55 Engine Generator 250A Denso 7848603

€113.95

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Part no. A2075400440

Mercedes-Benz E-Class A207 Additional Battery Tray Holder Mounting Bracket

€23.95

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Part no. A1693000204-2

Accelerator Sensor Mercedes W169 W245 YAW Rate Control Unit Module A1693000204

€23.95

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Part no. 9115107

BMW X5 Series E70 E70N LCI Wiring Set Wash Water Container Cable Loom 9115107

€23.95

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Part no. 9217912

BMW E82 E90 LCI Trunk Shelf Left Right Speaker Tweeter Harman Kardon 9217912

€28.95

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Part no. A0015454416

Mercedes CL203 M271 Automatic Gearbox EGS Control Module Unit ECU A0015454416

€37.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6977427

BMW E87 E90 E91 Mini Cooper R50 R52 R53 Air Module Control Unit ECU 6977427

€23.95

Free delivery - Tue, Jan 13

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Part no. 8381020

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

€28.95

Free delivery - Tue, Jan 13

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Part no. 7075944-3

BMW E60 E65 E70 Front Right Seat O/S Height Adjustment Drive 7075944

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2115402105

Battery Cable Mercedes W211 Starter Alternator Wiring Harness A2115402105

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6917557

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

€23.95

Free delivery - Tue, Jan 13

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Part no. A2125407605

Door Wiring Mercedes W212 Loom Cable Rear Left Right N/O/S A2125407605

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6968651

BMW 3 Series E93 Cabrio Rear Left N/S Aerial Antenna Unit AM/FM 6968651

€23.95

Free delivery - Tue, Jan 13

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Part no. A6395406509

Wiring Loom Mercedes W639 Vito Cable Door Wiring Cable A6395406509

€23.95

Free delivery - Tue, Jan 13

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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 - Tue, Jan 13

If paid before 14:00

Part no. 4L0971104S

Audi Q7 4L Rear Bumper Wiring Loom PDC Harness Parking Sensor 4L0971104

€28.95

Free delivery - Tue, Jan 13

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Part no. A0009006612

Rear Module Mercedes C205 W205 Fuel Pump Control Unit A0009006612

€23.95

Free delivery - Tue, Jan 13

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Part no. 8707750

BMW F20 F21 F22 F23 F87 M2 Body Domain Controller BDC Module FEM 8707750

€279.95

Free delivery - Tue, Jan 13

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Part no. 7599378

Transmission Wiring BMW F20 Petrol N55 Automatic Gearbox- Engine Harness 7599378

€66.95

Free delivery - Tue, Jan 13

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Part no. 6885215

BMW F90 M5 F91 M8 G05 G11 G30 Steering Column Control Unit Module 6885215

€23.95

Free delivery - Tue, Jan 13

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Part no. 9382516

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

€37.95

Free delivery - Tue, Jan 13

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Part no. A2045409813

Battery Cable Mercedes W204 W207 Positive Wiring Harness Loom A2045409813

€23.95

Free delivery - Tue, Jan 13

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Part no. 7537365

Cable Wire BMW E60 E61 E81 E87 E90 Tubing For Clamp 7537365

€23.95

Free delivery - Tue, Jan 13

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Part no. A1649100075

Mercedes ML W164 Lumbar Module Front Seat Lumbar Control Unit A1649100075

€51.95

Free delivery - Tue, Jan 13

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Part no. 9281518

BMW F20 F21 F22 F30 Radio Professional CD Bluetooth Headunit Control 9281518

€165.95

Free delivery - Tue, Jan 13

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Part no. 6977054

BMW X5 E70 Driver Side Front Right O/S Door Cable Harness Wiring 6977054

€23.95

Free delivery - Tue, Jan 13

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Part no. 9134646

Seat Module BMW E65 E66 Front Seat Control Unit Module ECU 9134646

€42.95

Free delivery - Tue, Jan 13

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Part no. 7948144

BMW F40 F44 Seat Occupancy Mat Control Unit Sensor 7948144

€23.95

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Part no. 7P6971121H

VW Volkswagen Touareg 7P Door Wiring Loom Harness Front Left N/S 7P6971121C

€28.95

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Part no. 8T0035223L

Audi A4 B8 A5 8T Audio Amplifier Sound Booster Control Unit Module 8T0035223L

€185.95

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Part no. 9303594

BMW Z4 E89 Anti Theft Alarm System Module Control Unit DWA 9303594

€23.95

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Part no. 8647878

BMW X5 F15 N20 Petrol Sensor System Engine Wiring Harness Cable Loom 8647878

€175.95

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Part no. 6925715

BMW 1 3 Series E81 E82 E87 E90 E91 E92 Positive Battery Terminal Cover 6925715

€23.95

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Part no. 6798937

BMW F11 Touring Air Suspension Control Unit ECU Rear Axle Module 6798937

€66.95

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Part no. 8K0907440

Audi Q7 4L GPS Tracking Location Control Unit Module Locator 8K0907440

€23.95

Free delivery - Tue, Jan 13

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Part no. 8092206-6

Air Module Wiring BMW F20 F21 F22 F30 F31 Steering Wheel Harness Cable 8092206

€37.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9253636

Air Module BMW F10 F11 F13 X3 F25 ECU Control Unit Controller 9253636

€32.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2709000900-4

Mercedes W176 A45 4Matic M133.980 381HP Engine Control ECU A2709000900 Automatic

€569.95

Free delivery - Tue, Jan 13

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Part no. 8510281

Engine Wiring BMW F30 F31 F32 F36 330d 430d N57N Loom Harness Cable 8510281

€132.95

Free delivery - Tue, Jan 13

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Part no. 6887753

BMW F20 F21 F22 F30 F31 F32 ICM Control Unit Module ECU 6868599

€32.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 1K0907530G

Audi A3 8P Gateway Module Diagnostic Interface Control Unit ECU 1K0907530G

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2125400080

Mercedes W212 Fuse Box Housing Relay Unit Module A2125400080

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A0465456628

Mercedes W203 W204 W218 Front Seat Wiring Loom Plug Connector A0465456628

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7624621

BMW X1 F84 Starter Wiring Battery Alternator Cable Harness Loom 7624621

€32.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9257093

Mini Navigation Head Unit R55 R56 R57 LCI R60 R61 CHAMP 2 Sat Nav DAB 9257093

€170.95

Free delivery - Tue, Jan 13

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Part no. 9299592

BMW F10 F11 Central Gateway Module ECU Control Unit Lear ZGW-02 4SK 9299592

€42.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8576484

BMW X3 G01 G20 G21 G30 G31 Starter Acoustic Vibration Plug 8576484 8588900

€23.95

Free delivery - Tue, Jan 13

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Part no. 8574351

BMW X1 E84 16d 18d 18dX Diesel N47N Engine Control Unit ECU DDE 8574351 Manual

€94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. YUCEL-Y12-6

Yuasa Yucel Burglar Alarm Battery Rechargeable Unit Y1.2-6 6V 1.2Ah C20

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6949226

BMW E63 E64 Convertible Coupe DWA Alarm System Module Control Unit 6949226

€23.95

Free delivery - Tue, Jan 13

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Part no. 55571379

Vauxhall Opel Insignia A Diesel Crankshaft Level Sensor Wiring Loom 55571379

€23.95

Free delivery - Tue, Jan 13

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Part no. 9270034

MINI Cooper One F55 F56 F57 Rear Antenna Aerial Amplifier DAB 9270034

€23.95

Free delivery - Tue, Jan 13

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Part no. 9141048

BMW E60 E87 E90 E91 Hands-Free Electronics Charging MULF2 9141048

€71.95

Free delivery - Tue, Jan 13

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Part no. 7P6971161FL

VW Touareg 7P Door Wiring Loom Harness Cable Front Passenger Side 7P6971161ES

€42.95

Free delivery - Tue, Jan 13

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Part no. 4H0951223

Audi A6 C7 Single Horn Alarm Siren High Tone Control Unit Module 4H0951223

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A6681530979

Mercedes W168 A 160 CDI OM668 Engine Control Module A6681530979

€28.95

Free delivery - Tue, Jan 13

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Part no. A6394404906

Mercedes-Benz Vito W639 Loudspeaker Cable Wiring Loom Harness A6394404906

€23.95

Free delivery - Tue, Jan 13

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Part no. 9282072

BMW 5 Series F10 F11 Cable Loom Door Passenger Side Wiring Harness 9256002

€23.95

Free delivery - Tue, Jan 13

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Part no. A0009002414

Module Fuel Pump Mercedes W205 C253 Control Module Unit A0009002414

€23.95

Free delivery - Tue, Jan 13

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Part no. 9324779

BMW F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM LR-01 9324779

€113.95

Free delivery - Tue, Jan 13

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Part no. 9153136

BMW F01 F02 F03 LCI Holder Bracket Control Telematics Unit 9153136

€23.95

Free delivery - Tue, Jan 13

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Part no. 9267203

BMW 3 Series E90 LCI Body Control Module H1 PL2RR JBBFE IIIR 61359267203 9267203

€47.95

Free delivery - Tue, Jan 13

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Part no. 0AH911023G

Audi Seat Skoda Volkswagen 1.2 TSI Petrol Starter Motor 0AH911023G

€47.95

Free delivery - Tue, Jan 13

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Part no. 8578495

Engine Wiring BMW F30 F31 330d F32 F36 430d N57N Loom Harness Cable 8578495

€66.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1669009311

SAM Module Mercedes ML W166 Center Electrics Control Modul A1669009311

€189.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8092797

Engine Wiring BMW F87 M2 F82 F83 M4 S55 Loom Module Harness Cable 8092797

€132.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A6429000500

Mercedes W204 C320 CDI OM.652.960 Engine Control Unit ECU A6429000500 Automatic

€85.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8843416

BMW G30 Battery Cell Module Supervision Circuit Control Unit 8843416

€42.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A2465405833

Mercedes W176 W246 Starter Cable Loom Wiring 160 180 CDI Diesel A2465405833

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 4F0907280E

Audi Q7 4L On Board Power Supply Control Module Unit ECU 4F0907280E

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 1K0955557A

VW Volkswagen Audi Seat Skoda Airbag Crash Impact Sensor SRC 1K0955557A

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. CC1T-10300-BD

Ford Transit Mk8 2.2 TDCi Diesel Engine Alternator Generator Unit CC1T-10300-BD

€94.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 9803844-1

Mini Cooper Countryman R58 R60 R61 Aerial Roof Antenna Base Module 9803844

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 8612576

BMW X1 F30 F31 LCI Starter Motor Engine 8612576

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 6949226-2

4 x BMW E63 E64 DWA Door Alarm System Module Control Unit Set 6949226

€23.95

Free delivery - Tue, Jan 13

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Part no. 8654635

Mini Cooper S F55 F56 Petrol Positive Battery Alternator Starter Cable 8654635

€23.95

Free delivery - Tue, Jan 13

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Part no. 9813878

Mini Cooper One R60 Footwell Light Module High EKS ECU SZT PL3 FRM3R 9813878

€189.95

Free delivery - Tue, Jan 13

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Part no. 9262871

BMW F01 Front Door Wiring Loom Cable Harness 9262871

€32.95

Free delivery - Tue, Jan 13

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Part no. 9153137

BMW F01 F02 F03 Holder Bracket Control Unit Top Rear Side View 9153137

€23.95

Free delivery - Tue, Jan 13

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Part no. 9261095

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

€23.95

Free delivery - Tue, Jan 13

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Part no. 04L906021BQ

Audi A4 B8 Engine Control Unit Module ECU 2.0 TDI CNHC 163HP 04L906021BQ

€56.95

Free delivery - Tue, Jan 13

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Part no. 9230944

Control Unit BMW F01 F02 F07 F10 F11 CAS4 Key Reading Module 9230944

€79.95

Free delivery - Tue, Jan 13

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Part no. A4479009808

Mercedes Vito W447 Fuse Box Relay Control Unit Electric Module SAM 4479009808

€237.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A0009054807

Mercedes W118 W177 W206 W247 NOX Sensor A0009054807

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7589971-1

Mini One R55 R56 N12 1.4 95HP ECU Engine Control Unit DME 7589971

€94.95

Free delivery - Tue, Jan 13

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Part no. 6938217

BMW 3 Series E90 E91 Wiring Loom Cable Front Door Left Passenger Side 6938217

€23.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. A1179006000

Camera Module Mercedes W156 W176 Reversing Rear View Control Unit A1179006000

€56.95

Free delivery - Tue, Jan 13

If paid before 14:00

Part no. 7577068-2

BMW E90 E91 E92 N52N 325i 218HP Engine ECU Kit DME 7577068 CAS3 Key Automatic

€427.95

Free delivery - Tue, Jan 13

If paid before 14:00

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Showing 595-693 of 12452 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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