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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BMW E65 Xenon Headlight Control Module LM E6X LWR 6943285

€51.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. CK52-18C951-AC

Range Rover L405 Speaker Wiring Loom Harness Cable CK52-18C951-AC

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6808577

Mini F55 F56 BDC Body Domain Controller Control Unit Module 6808577

€142.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8W0971035R

Audi A4 B9 Front Door Wiring Harness Cable Loom Driver Side 8W0971035R

€56.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4G0971845A

Audi A6 C7 Fuse Relay Box Sam Control Module 4G0971845A

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 3Q0907530AC

Audi A3 8V Gateway Diagnostics Interface Control Module 3Q0907530AC

€47.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2829003300-1

Mercedes W177 A180 282.914 136HP Petrol ECU Kit A2829003300 Key BCM Automatic

€246.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6797031

BMW F25 Shock Absorber Sensor Adapter Wiring Loom Cable Front Axle 6797031

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8P3035223B

Audi S3 8P Audio Sound System Amplifier Bose 290328

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. FW93-18K942-AB

Land Rover Discovery Sport L550 Aerial Antenna Amplifier Unit FW93-18K942-AB

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. CH22-14369-CB

Land Rover Discovery 4 L319 Front Bumper Wiring Harness Cable CH22-14369-CB

€66.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8582155-3

BMW F20 F30 F32 120dX 320dX 420dX 184HP N47N Engine ECU 8582155 Automatic

€66.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8574380-1

BMW F10 520d N47N 184HP Engine Control Unit ECU DDE 8574380 Automatic

€165.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9293311

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

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. DH52-18C815-BD

Land Rover Discovery 4 L319 Radio Head Unit DAB CD Player CH22-044H94-BAW

€123.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9130047

BMW E92 F32 E61 LCPA Seat Belt Module ECU

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9809354

Mini R55 R56 R60 R61 Air Module ECU Control Unit Module 9809354

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. GJ32-13W030-DC-2

Land Rover Evoque L538 Front Headlight Headlamp Wiring Left N/S GJ32-13W030-DC

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5Q0971230PT

Skoda Karoq Wiring Harness Alternator Battery Adapter Washer Tank 5Q0971230PT

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2135400329

Mercedes X253 Electrical Wiring Harness Cable Hybrid A2135400329

€89.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2229001609

Mercedes W222 Sound Amplifier Control Unit Module ECU A2229001609

€379.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 06L971627AA

Audi S3 8V Seat Leon Cupra 5f Injector Wiring Loom Harness 2.0 TSI 06L971627AA

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9388183

BMW F45 Active Tourer Body Control Module ECU 9388183

€132.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0465455728

Mercedes A207 W212 S212 Wiring Harness Plug Connector Black 2-Pin A0465455728

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5WA907361A

Volkswagen Golf Mk8 Audi S3 RS3 8Y Relay Electrical Fuse Box 5WA907361A

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5A7A0B8

Bmw U06 U10 F70 Engine Wiring Wire Harness Loom Servotronic Cable 5A7A0B8

€94.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1644403801

Mercedes ML350 W164 Gateway ECU Control Module Unit A1644403801

€303.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7558911

BMW 1 Series E81 E82 E87N E88 NOx Cable Wiring Petrol 7558911 12517558911

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 079971627R

Audi RS4 B8 RS5 8T Injector Wiring Loom Harness 4.2 V8 FSI Petrol 079971627R

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 02Z911024H

Volkswagen Passat B7 Starter Motor Actuator TDI Diesel Engine 02Z911024H

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 83A971392

Audi Q3 RSQ3 F3 Seat Belt Warning Wiring Harness Centre Left N/S 83A971392

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7595179-1

BMW E81 E87 LCI E90 N43 170HP Engine Control ECU Kit DME 7595179 Manual

€227.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6949080

BMW E90 E91 E92 E93 Seat Cross Member Wiring Cable Channel Duct 6949080

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8617707

BMW Mini Cooper F55 F56 Wiring Harness Engine Supply Module Cable Loom 8617707

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 81A955559A

Volkswagen Audi Skoda Windscreen Rain Sensor Control Unit 81A955559A

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8606777-4

BMW F30 F31 320iX N20 184HP Engine Control Unit ECU DME 8606777 Manual

€455.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2048700594-2

Mercedes W204 Radio Player COMAND Navi CD Head Unit A2048700594

€132.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. AM5T-19E663-AC

Ford Focus Mk3 Sunlight Sun Light Solar Sensor Unit AM5T-19E663-AC

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. EJ32-14290-CGC

Range Rover Evoque L538 Engine Bay Fuse Box EJ32-14290-CGC LR046377

€66.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 04L907309E-3

Audi A3 8V 1.6 TDI CRKB 110HP Engine Control ECU Kit 04L907309E Manual

€165.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2044409005

Mercedes W204 Battery Wiring Starter Alternator Wiring Harness A2044409005

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1698204085

Airbag Control Unit Mercedes W169 W245 System Module ECU A1698204085

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2079013700

Mercedes-Benz E-Class W207 Windscreen Windshield Rain Sensor Control Unit

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9206936

BMW F12 Antenna Aerial Noise Suppression Filter Control Unit Right O/S 9206936

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9362445

BMW F20 F21 F22 Audio Amplifier Harman Kardon Active Sound Design Unit 9362445

€104.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6824128

BMW F45 Mini F60 Hybrid High Voltage Cable Harnes 6824128

€47.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4M0959655AL

Audi A6 C8 Q7 4M Air Module Control Unit ECU 4M0959655AL

€313.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4K5971693AS

Audi A6 C8 Door Card Trim Wiring Harness Loom Rear Left Right N/O/S 4K5971693AS

€47.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5H0998476

Volkswagen Golf Mk8 CD1 Headlight Ballast Module Control Unit Left N/S 5H0998476

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1569007702

Signal Actuation Module Mercedes W176 W246 SAM Control Unit ECU A1569007702

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8W0907063CC

Audi A4 B9 BCM Body Control Module Comfort Unit ECU 8W0907063CC

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 3456625

Mini R56 MMI Multimedia Switch Button Panel Radio Reader Boost CD Player 3456625

€332.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2059008015

Mercedes W205 W447 Radio Multimedia Head Unit Cd Player A2059008015

€474.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9313638

BMW F30 F31 F80 M3 Front Passenger Wiring Loom Harness Cables 9313638

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. MICROLISE-MTU4-A-TRACKING-MODULE-UNIT

Volkswagen Caddy Maxi 2k Microlise MTU-4A Tracking Module Unit ECU Control

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9346566

BMW F45 F46 X1 F48 X2 F39 Negative Battery Cable Terminal Wiring 9346566

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4H0951253

Audi A3 8P Multi Use Control Module Relay 4 Pin Light Green Unit 4H0951253

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A4475450069-2

Mercedes Vito W447 Control Unit Fuse Box Compartment Mount A4475450069

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1644400650

Mercedes W164 W251 Front Wiring Loom Harness Seat Cable Loom A1644400650

€89.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6934648

BMW X5 E70 E91 LCI Touring Tailgate Trap Circuit Aerial Amplifier 6934648

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4L0035652B

Audi Q7 4L MMI Multimedia Radio CD Player Sat Nav Head Unit 4L0035652B

€227.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 06K907425B-3

Volkswagen Golf Mk7 2.0 TSI CHHB 220HP Engine ECU Kit 06K907425B Manual

€284.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7H0907652A

Audi Q7 4L Yaw Rate Speed Sensor Module 7H0907652A

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8574372

BMW F30 F32 330d 430d Diesel N57N Engine Control Unit ECU DDE 8574372 Automatic

€189.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. AG9T-14240-DED

Ford S-Max Door Harness Loom Wiring Wire Rear Right O/S AG9T-14240-DED

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2741504704

Mercedes X253 Engine Wiring Harness Line Supply Line A2741504704

€113.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 3AA906337

Volkswagen Passat B7 Engine ECU Control Module Mount Cover Carrier 3AA906337

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9172019

BMW 5 Series E60 E60N E61 E61N LCI Airbag ECU Control Unit Module 9172019

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8617709

BMW Mini Cooper F55 F56 Wiring Harness Motor Sensorsystem Module 8617709

€113.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8W0907064GB

Audi A4 B9 A5 F5 Central Body Control Module BCM Unit ECU 8W0907064GB

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A4539018900

Smart ForTwo C453 Air Module Impact SRS Control Module ECU A4539018900

€85.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8T0959793P

Audi A4 B8 A5 8T Door Control Unit Module Front Driver's Side 8T0959793P

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9178962

BMW X5 X6 E70 E71 Power Distribution Fuse Box Battery 9178959

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2125405710

Mercedes W212 PDC Wiring Parktronic Parking Sensor Cable Rear A2125405710

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7CP1-18C847-CA

Ford Focus Mk3 Aerial Antenna Amplifier Control Unit Module 7CP1-18C847-CA

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2049060305

SAM Module Mercedes W204 Control Unit Electrical Fuse Box Unit A2049060305

€108.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8J0057186Q

Audi TT 8J Radio Head Unit CD Audio Player Control Unit 8J0035186Q

€85.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5N0035342C

VW Volkswagen Touareg 7L Media Interface Module Control Unit Box 5N0035342C

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 3Q0907530AR

VW Volkswagen Transporter T6 Gateway Control Unit Module ECU 3Q0907530AR

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 431951253G

Audi S8 A8 D3 Relay Control Module Unit Purple 381 4 Pins 431951253G

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9296780

BMW F20 F21 F30 F31 Control Unit Air Conditioning Module 9296780

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2229005914

Mercedes W205 Rear SAM Module Control Unit A2229005914

€56.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. LR014060

Land Rover Freelander 2 L359 Diesel Starter Motor LR014060 AH52-11001-AC

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2514406236

Mercedes W164 Steering Wheel Air Module Wire Wiring Cale Harness A2514406236

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. GH22-14F041-AA

Land Rover Discovery 4 L319 Junction Fuse Box 3.0 Diesel GH22-14F041-AA

€142.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0009003310

Mercedes W205 W213 Fuel Pump Module Control Unit ECU A0009003310

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9393144

BMW G11 G30 Fuse Box Power Distribution Electrical Control Unit Box Rear 9393144

€47.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5Q0959392F

Audi Q2 GA A3 8V Door Control Module Unit Front Passenger's Side N/S 5Q0959392F

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9316575

BMW 1 2 Series F20 F21 F22 Battery Cable Lead Positive Underfloor 9316575

€75.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2139008730

Mercedes C253 W177 W205 W247 Gearbox Module Control ECU Automatic A2139008730

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 3508099

BMW X3 SERIES E83 Wiring Loom Harness Passenger Side 3508099

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. GJ32-13W029-DC-2

Range Rover Evoque L538 Front Headlight Wire Harness Right O/S GJ32-13W029-DC

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. DG9T-14B531-CF

Ford Mondeo MK5 Front Door Control Module ECU Right O/S DG9T-14B531-CF

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1644400937

Mercedes ML W164 Rear Bumper PDC Wiring Parking Sensor Loom Harness A1644400937

€56.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6850846

BMW F10 F11 F12 Parking Brake Unit Electric Control Module EMF 6850846

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2078200159-2

Mercedes W207 Headlight Lamp Light Front Left N/S Cable Wire Harness A2078200159

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6C1113W029BG-2

Ford Transit MK7 Headlamp Light Lamp Front Right O/S Harness Wire 6C1113W029BG

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0325453032

Mercedes W220 Automatic Gearbox Control Unit Module ECU A0325453032

€123.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 1K0971250CD

VW Volkswagen Caddy 2K Jetta A6 Ground Cable Alternator Wiring 1K0971250CD

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

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