What is the construction and purpose of automotive electrical systems?

Automotive electrical systems are a set of components responsible for starting, charging, powering consumers, and controlling vehicle electronics. They include, among others, the battery, alternator, starter, fuses, relays, controllers, and wiring harnesses. These components are located in different parts of the car and work together through connectors and signal buses.

What are automotive electrical systems used for?

Automotive electrical systems are used to supply energy and transmit control signals to vehicle components. Thanks to them, it is possible to start the engine, charge the battery, and operate lights, windows, air conditioning, and safety systems. A fault in one circuit can affect not only comfort but also the correct operation of other modules.

What role does the wiring harness play in a car?

The wiring harness is an organized set of wires, covers, and connectors that connects individual consumers and controllers in the vehicle. It is used to transmit power, ground, and signals between modules. Its construction depends on the body version, equipment, and mounting location, so when replacing it, you must compare the wire routing, plug type, and number of pins.

How to choose an electrical part for a specific car?

The safest way is to compare the OEM number, manufacturer number, connector type, and mounting location. It is also worth considering the engine version, year of manufacture, body type, and equipment, as the same model may have different variants of the alternator, starter, or controller. In practice, verification by VIN is very helpful.

What symptoms indicate a problem with the electrical system?

Typical signals include difficulty starting, flashing warning lights, dimming lights, unstable charging, or the failure of selected consumers. In some cases, controller errors, air conditioning malfunctions, or periodic power outages also occur. Symptoms must always be linked to a specific circuit and cooperating component.

How to take care of automotive electrical systems in daily use?

The basis is regular inspection of the battery condition, terminals, ground wires, and charging. It is also good to check the tightness of housings, the condition of harness insulation, and the cleanliness of contacts exposed to moisture. A quick reaction to the first symptoms of voltage drops or electronic errors makes it easier to avoid a major failure.

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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ICM Air Module BMW F20 F21 F22 F30 F31 Control Unit ECU 6887752

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1245401850

Mercedes W124 M103.940 Engine Fuse Box Module Unit A1245401850

€75.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8T8035225D

Audi A5 8T Audio Radio Aerial Amplifier Control Unit 8T8035225D

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5Q0971499

Audi Q3 F3 VW Golf Mk7 Automatic Gearbox Wiring Loom Harness Cable 5Q0971499

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8674261

Mini Cooper One F56 B38 1.5 102HP Engine Control ECU DME Kit 8674261 Manual

€165.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8574372-3

BMW F30 330d F32 430d N57N 258HP Engine Unit ECU Kit DDE 8574372 Key FEM

€213.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9298961

BMW F20 F21 F30 F31 F32 Body Control Unit Module REM 9298961

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4N0035751

Audi A6 C8 Engine Sound Control Unit Module 4N0035751

€189.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2059005222

Seat Module Mercedes W205 W253 Memory Control Unit Passenger's Side A2059005222

€47.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8J0971349BF

Audi TT Mk2 8J Alternator Charging Wire Cable 1.8 2.0 TFSI Petrol 8J0971349BF

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 0AD927755BG

VW Volkswagen Touareg 7L Transfer Box Control Unit Module ECU 0AD927755BG

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5C0959655D

Volkswagen Golf MK6 Air Module Control Unit ECU 5C0959655D

€94.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 3M5T-14A076-AC

Ford Focus Mk2 Under Hood Bonnet Fuse Box Cover Lid Trim Panel 3M5T-14A076-AC

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5A0C047

BMW G20 G21 Front Door Wiring Loom Harness Cable Driver's Side 5A0C047

€56.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6940763

BMW 7 Series E65 E66 E67 Ultra Sonic-Module 6940763

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7374942

BMW F20 F21 F30 F31 Fuel Pump Control Unit Module 7374942

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6809374

BMW F01 F07 F10 F11 F12 F25 CAS4 Module Control Unit Key Reading 6809374

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. M8D2-14B673-AC

Range Rover Evoque L551 Tailgate Hands Free Control Module Unit M8D2-14B673-AC

€61.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8574352

BMW X1 E84 20d 20dX 184HP N47N Engine Control Unit ECU DDE 8574352 Automatic

€89.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2059004321

Mercedes W205 X253 Front Right O/S Door Control Unit Module A2059004321

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5J6971161BA

Skoda Fabia Mk2 5J Rear Door Wiring Loom Harness Cable Right O/S 5J6971161BA

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9301308

BMW F20 F21 F22 F30 Control Unit Air Conditioning System 9301308

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8P0035785-1

Audi A3 8P Multimedia Interface Unit Module Bracket Mount 8P0035785

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4F1971687S

Audi A6 C6 Rear Door Wiring Left Right N/O/S Harness Loom Cable 4F1971687S

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2229009534

Mercedes W222 Front Headlight Headlamp Control Unit Module A2229009534

€113.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8T8971687J

Audi A5 S5 8T Door Wiring Loom Harness Wire Cable Rear Left N/S 8T8971687J

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7PP035620BK

Porsche Cayenne 92A Vehicle Tracking Control Unit Module 7PP035620BK

€113.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9118108

BMW 1 Series E81 E82 Wiring Set Door Co-driver 9118109

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2059064505-2

Mercedes S205 Estate Rear Headlight Wiring Harness Cable Right O/S A2059064505

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9338153

Mini F54 F60 Clubman Countryman Antenna Aerial Amplifier AM / FM Unit 9338153

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2129007225-1

Mercedes W212 C218 Radio Comand Control Head Unit Module Navigation A2129007225

€313.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9236519

BMW 1 Series E81 E87 LCI Front PDC Parking Distance Control Loom Wiring 9236519

€56.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7300271-2

BMW F01 Rear Tail Light Wiring Harness Cable Inner Left N/S 7300271

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9353270

BMW G11 G12 Trunk Bracket Holder Audio Boot Amplifier Mounting Mount 9353270

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 2E0945096-2

Volkswagen Crafter 35 Rear Tail Light Wiring Harness Cable Right O/S 2E0945096

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6913363

BMW E65 Glovebox Glove Box Dash Storage Wiring Harness Cable 6913363

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A9076830400

Mercedes W907 Fuse Box Relay Cover Lid Control Unit Bracket Trim A9076830400

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9477151-2

Mini Countryman F60 Rear Tail Light Lamp Wiring Harness Cable Left N/S 9477151

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2118702926

Mercedes W211 C219 Front Windscreen Rain And Light Sensor Rain-Light A2118702926

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8K0959655N

Audi A4 B8 A5 8T Air Module Control Unit ECU 8K0959655N

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7527610

Mini Cooper R50 W10 116HP Petrol Engine Control Unit ECU DME 7527610 Automatic

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2465400308-1

Mercedes W176 W246 OM651 Alternator Cable Battery Prefuse Box A2465400308

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5E0971095DP

Skoda Octavia Mk3 Front Bumper Wiring Harness Loom Cable 5E0971095DF

€56.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 3Q0959655R

Seat Leon Mk3 5F Air Module Control Unit Sensor ECU 3Q0959655R

€85.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5Q0959592F

Door Module Audi A3 8V Volkswagen Golf 7 Control ECU Front Left N/S 5Q0959592F

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8K0971693B

Audi A4 B8 Rear Door Card Harness Wiring Cable Loom Left Right N/O/S 8K0971693B

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8P0907063A

Audi A3 8P BCM Body Control Unit Comfort Module 8P0907063A

€94.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9188853

BMW X5 E70 X6 E71 Battery Earth Cable Ground - Pole Lead L= 490MM 9188853

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9325552

BMW F06 Gran Coupe F12 F13 Parking Brake Wiring Loom Harness Cable 9325552

€56.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1679050200

Mercedes A238 Tailgate Boot ECU Control Unit Module A1679050200

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0005406050

Mercedes ML W164 W169 W205 W212 Fuse Box Relay Control Unit Module A0005406050

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7640132-1

Alternator BMW F20 LCI Mini F30 F56 F60 Alternator Generator DENSO 150A

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 1K6035577AD

Volkswagen VW Golf Mk5 Aerial Signal Amplifier Booster Antenna AM FM 1K6035577AD

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9374508

BMW F20 F21 F30 F31 REM Rear Electronic Module Fuse Box Control Unit V3 9374508

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7850995

Engine Wiring BMW F80 M3 F82 M4 S55 Inject Loom Cable Harness Injector 7850995

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8570676-1

BMW F30 F32 LCI N57N N57Z Diesel Engine Alternator Generator 230A Valeo 8570675

€56.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2129005614-2

Mercedes A207 W212 W218 Radio Head Unit Navi CD Player Navigation A2129005614

€203.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7180427

Fuel Pump Module BMW E60 E81 E87 E90 E91 LCI Control Unit ECU 7180427

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. YWC000783

Land Rover Discovery 3 L319 Front Seat Memory Control Unit Module ECU YWC000783

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6821203

Battery Cable BMW F45 F46 Negative Lead IBS Wiring Harness 6821203

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7PP919148A

Porsche Cayman 987 Cayenne 92A TV Tuner Reveiver ECU Control Module 7PP919148A

€612.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7PP959795T

Porsche Cayenne 92A Rear Door Control Module ECU Left Right N/O/S 7PP959795T

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9362398

BMW F20 F21 F30 F31 F32 F45 Body Control Unit Module REM 9362398

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6938221

BMW 3 Series E90 E91 Wiring Loom Front Door Left Passenger Side 6938221

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9183233

BMW E60 E61 LCI Centre Console Switch Cluster Control Unit ECU Module 9183233

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7387549-2

BMW F32 Bi-Xenon Headlight Lamp Light AKL Wiring Cable Front Left N/S 7387549

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. M8D2-14N030-AA

Range Rover Evoque L551 Rear Fuse Box Relay Control Unit Module M8D2-14N030-AA

€61.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 03L903017E

Audi A4 B8 A5 8T Q5 8R Quattro Alternator Generator 2.0 TDI 03L903017

€56.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8T0959792P

Audi A5 8T Front Door Control Module Right O/S Passenger Side 8T0959792Q

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2046190048

Mercedes-Benz C W204 Rear Battery Support Holder Mount Bracket A2046190048

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7LA971411E

VW Volkswagen Transporter T6 Power Steering Oil Sensor Wiring Harness 7LA971411E

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8T0959754D

Audi A4 B8 A5 8T A6 C7 Remote Radio Alarm Key Button Control 868 MHZ 8T0959754D

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A6395406609

Wiring Loom Vito Mercedes W639 Front Door Cable Left Right N/O/S A6395406609

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2059007437

Sam Module Mercedes S205 Relay Fuse Box Rear Control Module In Trunk A2059007437

€94.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2479007709

Front Camera Module Mercedes C118 W177 W247 Lane Assist Control Unit A2479007709

€94.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. LR040553

Range Rover L405 Alternator Generator Wiring Loom Link CK5210C307CD

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. CPLA-5B710-AB-1

Range Rover L405 Air Suspension Valve Control Unit Module CPLA-5B710-AB

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8K0971030E

Audi A4 B8 Front Door Wiring Harness Loom Cabling Passenger Side 8K0971030E

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2218702993

Mercedes CL W216 W221 Air Module Control Unit A2218702993

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 1K0907361B

Audi A3 Q3 8U Relay Plate Fuse Box Bracket Holder Housing Retainer 1K0907361B

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0009060226

Starter Mercedes Vito W447 Diesel OM622 Starter Motor A0009060226

€70.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9360357-1

Door Wiring Mini F55 F56 R60 Rear Right Left N/O/S Harness Loom Cable 9360357

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2118701885

Mercedes ML W164 Control Unit Module DC UHI MOST A2118701885

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A9069005701

Mercedes W639 W906 Air Module SRS Control Unit ECU A9069005701

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0009062822-1

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

€104.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4G5945096C-2

Audi A6 C7 Rear Outer Taillight Lamp LED Wiring Harness Right O/S 4G5945096C

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2535407830

Mercedes C253 AMG Rear Bumper PDC Wiring Parking Sensor Loom Harness A2535407830

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7C0937517AC

VW Crafter SY Fuse Box Distribution Relay Module Housing Bracket 7C0937517AC

€70.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7515197-2

MINI Cooper One R50 W10 Battery Cable Plus Pole 7515197

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2229001908

Mercedes W205 Door Control Module Unit ECU Front Right O/S A2229001908

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. BK3T-9K499-FBD

Ford Transit Custom Mk8 Under Bonnet Fusebox Wiring Loom BK3T-9K499-FBD

€180.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6929701

BMW 7 Series E65 E66 Alarm System Ultra Sonic Module 65756929701 6929701

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. P0148459-BRG1

Mini Cooper One R50 Fuel Filler Cover Flap British Racing Green A67

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7521582

BMW E46 E83 E85 Engine Electronics Unit Box Cover Trim 7521582

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 2755518

Mini R55 R56 R57 Battery Tray Holder Mounting Bracket Housing Box 2755518

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5F4971036M

Seat Leon Mk3 5F Door Wiring Loom Harness Front Passenger Side 5F4971036M

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2059064405-2

Mercedes S205 Estate Rear Headlight Wiring Harness Cable Left N/S A2059064405

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4L0035223G

Audi Q7 4L Bose Sound System Audio Amplifier Amp Bose 4L0035223G

€379.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. LHD-R60-SCREEN

Mini R60 R61 Instrument Cluster Speedometer Display Screen Android 8"

€284.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

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