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 E46 M3 Starter Motor Positive Battery Cable Lead Wiring Harness 7831186

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6G9T-14B192-EA

Ford Fiesta Transit Relay 4-Pin Grey FoMoCo Unit 6G9T-14B192-EA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F0907280A

Audi A6 C6 On Board Onboard Supply Module Control Unit ECU 4F0907280A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7391043

BMW F10 X1 F48 Mini F54 Rear Tailgate Smart Opener Bottom Wire Sensor 7391043

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1J0927841

Audi Volkswagen Seat Skoda ESP Relay Unit Grey 444 1J0927841

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8P0035613

Audi A3 8P Bluetooth Module Multimedia Control Unit Cover Unit 8P0035613

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5E3971392AC

Skoda Octavia VR Seat Frame Wiring Harness Cable Front Right O/S 5E3971392AC

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0941824B

Audi Q5 8R Q7 4L A7 4G Fuse Box Connector Socket Module Unit 8K0941824B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. HK72-19H406-AC

Land Rover Discovery Sport L550 Front Windscreen Camera HK72-19H406-AC

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6C11-13W030-BG-2

Ford Transit Mk7 Headlamp Light Lamp Front Left N/S Wire Harness 6C11-13W030-BG

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0971142C

Audi A8 D4 Door Card Wiring Loom Cable Harness Rear Right O/S 4H0971142C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. F1ET-14B533-BE

Ford Focus Mk3 Front Door Control Module Passenger Side F1ET-14B533-BE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2129061903-2

Mercedes S212 Boot Tailgate Lamp Inner Left N/S Wire Harness Loom A2129061903

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5A2D542

BMW F40 Body Control Module Domain Controller Unit BDC ECU 5A2D542

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. LR025823

Land Rover Vogue L322 Alternator Generator Mount Bracket Holder BH42-10239-BA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8573779-1

BMW F30 330dX 258HP N57N Control Unit Module ECU DDE 8573779 Key FEM Automatic

€308.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7273667

BMW F30 F31 F32 Rear Tailgate Smart Opener Lower Antenna 7273667

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8809737

PDC Wiring BMW X4M F98 G02 Rear Bumper Parking Assistance Sensor Harness 8809737

€89.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 82A971589B

Audi A1 GB S3 8Y Multifunction Steering Wheel Button Wiring Harness 82A971589B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9436281

BMW G20 G21 Front Door Wiring Loom Harness Cable Driver Side 9436281

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0919275B-MGW1

Audi Q2 GA A3 8V A4 B9 A5 F5 PDC Parking Sensor Set X4 Glacier White Pearl - S9R

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9146329-1

BMW X5 E60 E61 E65 E70 Front Left N/S Seat Angle Adjustment Drive 9146329

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 000051446C

VW Volkswagen Golf Mk6 5K Digital Media Adapter Cable Wiring Loom 000051446C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0937084M

Volkswagen VW Golf Mk7 BCM Convenience Body Control Module Unit ECU 5Q0937084M

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2218708285

Mercedes W221 Head Unit DVD High Line Radio Player Navigation A2218708285

€560.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. AH22-18N378-AB

Land Rover Discovery 4 L319 Battery Tray Holder Trim Right O/S AH22-18N378-AB

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0035456

Audi S5 8T Antenna Amplifier Aerial Control Module Unit ECU 8J0035456

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 02E911024H

Volkswagen Seat Skoda Audi 2.0 TDI Diesel Engine Starter Motor Valeo 02E911024H

€61.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7634297-3

BMW F20 F30 116i 316i N13 136HP Engine Control ECU Kit DME 7634297 Automatic

€427.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9137804

Mini Cooper One R55 R56 R57 R58 R59 Drivers Door Wiring Harness Loom 9137804

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 057906051H-3

Audi RSQ3 F3 DPF Differential Pressure Sensor 2.5 TFSI 057906051H 83A131552G

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8377939

BMW X5 E39 E53 Sunroof Sliding Roof Drive Unit Motor Actuator 8377939

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. F1ET-14B531-BE

Ford Focus Mk3 Front Door Control Module Driver Side F1ET-14B531-BE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1648204426

Mercedes W251 Air Module Control Unit ECU A1648204426

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7P0971599B

Porsche Cayenne S 92a Wiring Harness Wire Cable Battery Alternator 7P0971599B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2055401302

Mercedes C205 Positive Battery Wiring Loom Harnes Cable A2055401302

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7273666

BMW F30 F31 F32 Rear Tailgate Smart Opener Upper Antenna 7273666

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1T0035577AF

VW Volkswagen Touran 1T Aerial Amplifier Control Unit Module 1T0035577AF

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7G91-12A650-UH

Ford Mondeo Mk4 Engine ECU Module 2.0 TDCi DW10 140HP Manual 7G91-12A650-UH

€99.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. YIE500082PVJ

Range Rover Sport L320 Multimedia Sat Nav Display Screen YIE500082PVJ

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5WB959107

Audi Q3 F3 Rear Tailgate Bootlid Control Unit Module ECU 5WB959107

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 39113-2A511

Kia Ceed I 1.6 CRDI 115HP D4FB Diesel Engine Control ECU 39113-2A511 Manual

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8606306

BMW F10 F11 F30 184 HP Petrol N20 Engine Control Unit ECU DME 8606306 Manual

€332.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2K7035869A

Volkswagen Crafter Sy Caddy 2021 Radio Navigation Sat Nav Head Unit 2K7035869A

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0004461160

Mercedes Sprinter W906 FleetBoard Onboard Time Recorder Control Unit A0004461160

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9340996

BMW F87 Door Wire Harness Cable Loom Front Passenger's Side 9340996

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K8955557

Volkswagen Scirocco Mk3 Door Crash Impact Pressure Sensor Unit 1K8955557

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0005400764

Mercedes W205 Battery Negative Ground Bonding Line Wire Earth Cable A0005400764

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06A903141P

Audi A3 8L Alternator Tensioner Pulley Ancillary Bracket 1.8T APY 06A903141P

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2215403110

Mercedes W221 Positive Battery Cable Wire A2215403110

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. H2GT-14C676-AA

Ford Mondeo Mk5 Front Door Crash Impact Sensor Left Right N/O/S H2GT-14C676-AA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. LS7T-14B321-CC

Ford Mondeo Mk5 Restraint Control Module Air Unit Diagnostic ECU LS7T-14B321-CC

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4M0971237S

Audi Q7 4M Q8 Mk1 Battery Negative Cable Wiring Earth Line 4M0971237S

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6958449

BMW 7 Series E65 E66 E67 Control Unit Door Rear Driver Side 61356958449 6958449

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0959592L

Volkswagen Golf Mk8 Front Door Passenger Side Module Control Unit 5Q0959592L

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7M0951253C-1

VW Volkswagen T5 Audi Seat Skoda Relay Black Control Unit 5 Pin 12V 7M0951253C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6923502

Mini R50 One D Diesel W17 Cable Starter Base B- Wire 6923502

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9G9T-14240-HBB

Ford Mondeo Mk4 Door Wiring Harness Loom Cable Rear Right O/S 9G9T-14240-HBB

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8681185

BMW F40 F44 F46 X1 F48 Mini F54 F56 F57 F60 Engine Wiring Loom Harness 8681185

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1725404009

Mercedes R172 Wiring Cable Harness Front Driver's Door Wiring Loom A1725404009

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1669007809

Mercedes GLE W166 Rear Door Wiring Control Module Left N/S Unit ECU A1669007809

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1J0941385A

Audi TT 8N VW Golf Mk4 Relay Box Cover Housing Panel 1J0941385A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0971765E

Audi A7 4G8 3.0 TDI Adblue Tank Pump Wiring Loom Harness Loom 4G0971765E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906018GF-2

Volkswagen Scirocco Mk3 2.0 TDI 140HP Engine Module ECU Kit 03L906018GF Manual

€170.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 000937615B

Audi Q3 F3 Volkswagen Tiguan 5N Jetta Mk4 Fuse Relay Box 000937615B

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. BK3T-14335-BC

Ford Transit Mk8 Interior Reading Roof Light Wiring Harness Cable BK3T-14335-BC

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9303543

BMW F20 F30 F31 Fuse Box Electrical Power Distribution 9303543

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. CPLA-14F720-BK

Range Rover Evoque L538 DAB Radio Control Unit Module CPLA-14F720-BK

€99.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W6945094H-1

Audi A5 S5 F5 LED Tail Light Lamp Wire Harness Cable Right O/S LED 8W6945094H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1728208710

Mercedes W176 W246 Roof Towing Alarm Sensor Switch Module A1728208710

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9304007

BMW G30 Seat Occupancy Sensor Mat Passenger Side Control Unit Module 9304007

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2129062003-2

Mercedes S212 Rear Tailgate Trunk Inner Lamp Cable Wire Right O/S A2129062003

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. N8A2-14N168-AA

Range Rover Velar L560 Power Distribution Box Wiring Loom Hybrid N8A2-14N168-AA

€108.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7CA971695G

VW Volkswagen Crafter SY Rear Door Wiring Loom Harness Left N/S 7CA971695G

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8716602

BMW G20 Front Door Wiring Loom LED Light Harness Passenger Side 8716602

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. AB39-12A650-DF

Ford Ranger Mk6 2.2 TDCI 4x4 150HP Engine Control ECU AB39-12A650-DF Manual

€222.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. BK2T-10N725-BF

Ford Transit Mk8 Battery Box Lid Tray Cover Panel Trim BK2T-10N725-BF

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6R0937550A

Volkswagen Polo 6R Battery Fuse Box Distribution Terminal Unit 6R0937550A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2789060600

Mercedes W166 R172 W205 C207 W212 C216 Engine Starter Motor 12V A2789060600

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9657384680

Citroen C4 Peugeot 407 3008 Alarm Anti-Theft Siren Module Unit 9657384680

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3M5T14B342AB

Land Rover Freelander Ford Mondeo Focus Airbag Crash Impact Sensor 3M5T14B342AB

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1J0919506M

Volkswagen Skoda Seat Audi Radiator Cooling Fan Relay Control Unit 1J0919506M

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06E971627T

Audi A6 C7 2.8 FSI CHVA Petrol Engine Wiring Loom Harness Cable 06E971627T

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1765406708

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1725404809

Mercedes R172 Wiring Cable Harness Front Passenger Door Wiring Loom A1725404809

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8X0971036BS

Audi A1 8X Door Card Wiring Harness Loom Cable Front Passenger Side 8X0971036BS

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. AH42-14A073-AB

Land Rover Range Rover L322 Engine Bay Fuse Box Module AH42-14A073-AB

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0959795D

Audi A8L 4H Rear Door Module Control Unit Left Right N/O/S 4H0959795D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2769007300

Mercedes SL400 R231 276.825 333HP Engine Control Unit ECU A2769007300 Automatic

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9289374-1

BMW X5 F15 X6 F16 Front Battery Fuse Box Positive Distribution Terminal 9289374

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L907309R-8

VW Passat B8 1.6 TDI 120HP Engine Control Unit ECU Kit SET 04L907309R Manual

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. EOS-RADIO

Volkswagen VW Eos Android Car Radio System Touchscreen 7" Android Auto CarPlay

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. FH22-14631-AAC

Land Rover Discovery 4 L319 Door Wire Harness Front Driver's Side FH22-14631-AAC

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8580053

Starter Cable BMW G30 G31 G32 Alternator Wiring Starter-Base B+ 8595355

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. GX63-19C299-AC

Range Rover Jaguar F-Pace 10" Stereo Radio Display Screen GX63-19C299-AC

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. BK2T14A175CA

Ford Transit Custom MK8 Fuse Relay Box Control Unit Module BK2T-14A175-CA

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. GJ32-14D600-AD

Range Rover Evoque L538 Seat Module ECU Front Left Right N/O/S GJ32-14D600-AD

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1648201826

Mercedes W251 Parking Distance Control Module ECU PDC A1648201826

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8367253

BMW E38 Fuse Box Battery Power Junction Control Unit Module 8367252 8367253

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

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