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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VW Volkswagen Passat B7 Aux Input In Wiring Plug Port Loom Harness 3AA971154

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7L0909606D

Volkswagen Touareg 7L Front Impact Crash Sensor Right Left N/O/S 7L0909606D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P6907658

VW Volkswagen Touareg 7P Pitch Angle Sensor Control Unit 7P6907658

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3C5945095H-1

VW Passat B6 Rear Tail Light Lamp Wiring Harness Cable Left N/S 3C5945095H

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1T0035577AE

VW Volkswagen Touran 1T Aerial Antenna Amplifier Unit Module 1T0035577AE

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0937085T

Volkswagen Golf Mk7 Body Control Module BCM 2.0 TFSI 5Q0937085T

€75.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5CU971095

Volkswagen Jetta A6 Bumper Cable Wiring Harness Loom 5CU971095

€42.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 7P6907816

VW Touareg 7P Pitch Angle Sensor Control Unit Mount Bracket Holder 7P6907816

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0909605T

VW Volkswagen Golf Mk5 V 1K Air Module Control Unit ECU 1K0909605T

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 000051446C

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5K0837202Q-1

Volkswagen VW Golf Mk6 Remote Key Radio Alarm Key Fob Opener 3 Button 5K0837202Q

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0937084M

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

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1T0035577AF

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K8955557

Volkswagen Scirocco Mk3 Door Crash Impact Pressure Sensor Unit 1K8955557

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 2Q0937090A

Volkswagen Polo Gti AW1 Body Control Module BCM Unit 433MHZ 2.0 TFSI 2Q0937090A

€42.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 000937615B

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

€32.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 6R0937550A

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1J0919506M

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4H0959792F

VW Touareg 7P Front Door Control Module Unit ECU Passenger Side 4H0959792F

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6C0971065

Volkswagen VW Polo MK5 Parking Sensor Wiring Rear Bumper Loom Cable 6C0971065

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7CA971696J

Volkswagen Crafter SY Rear Door Wiring Loom Harness Cable Right O/S 7CA971696J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2HJ962211N

Volkswagen Amarok Mk2 Engine Earth Ground Wiring Harnes Cable MB3T-18C942-BF

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A9060005999

Mercedes Sprinter W906 Front Door Wiring Harness Left Right N/O/S A9060005999

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7L0941824A

Volkswagen Touareg 7L Fuse Box Module Electrical Relay Control Unit 7L0941828A

€23.95

Free delivery: Nov 12 – 13

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Part no. 2Q0915459

Volkswagen Polo GTI AW1 Rear Battery Potential Distributor Positive 2Q0915459

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7N0937503A

Audi Q3 8U VW Scirocco Mk3 Relay Bracket Holder Box 7N0937503A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1T0971235A

Volkswagen Golf MK5 6 Audi A3 8P Negative Battery Terminal Cable 1T0971235A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K4907107F

Audi Q7 4M Driver Assistance Module Control Unit 4K4907107F

€313.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3C5945096H-1

VW Volkswagen Passat B6 Saloon Rear Lamp Wiring Cable Right O/S 3C5945096H

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0951253

VW Volkswagen Audi Seat Relay 449 Unit Module 4 Pins 1K0951253

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2K5972175

Volkswagen Caddy 2K Rear Gate Tailgate Harness Wiring Adapter Cable 2K5972175

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3C5945094F-2

Volkswagen Passat B6 Rear Lamp Light Taillight Right O/S Wire Harness 3C5945094F

€23.95

Free delivery: Nov 12 – 13

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Part no. 5N0035341G

Volkswagen Golf Scirocco CC Multimedia Interface Module Box 5N0035341G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06K907425B-13

Volkswagen Golf VII R 2.0TSI CJXC 300HP Engine Control ECU Kit 06K907425B Manual

€284.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4H0971569E

Audi A8 D4 Heater Blower A/C Air Conditioning Wiring Harness Cable 4H0971569E

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2G0907159A

Volkswagen VW Polo Mk6 Impact Sound Control Unit Module ECU 2G0907159A

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5H0868160

Volkswagen Golf R CD1 Interior Speaker Trim Cover Grille Panel 5H0035412A

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06L971627AD

Volkswagen Golf MK7 GTI Fuel Injectors Wiring Harness 2.0 TFSI 06L971627AD

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7E0971691

Volkswagen Transporter T5 Sliding Door Wiring Loom Cable 7E0971691

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7N0959794F

Volkswagen Sharan 7N Rear Door Control Module Left Right N/O/S ECU 7N0959794F

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5G0971104AD

VW Volkswagen Golf Mk7 Wiring Loom PDC Rear Harness Parking Sensor 5G0971104AD

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7E0959655D

VW Volkswagen Transporter T6 Air Module Control Unit ECU 7E0959655D

€104.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L906021P-1

Volkswagen Crafter 2E 35 2.0 TDI CSLA 109HP Engine ECU Kit 03L906021P Manual

€569.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3WA959393A

Volkswagen Crafter Mk2 SY Door Control Unit Module Driver Side 3WA959393A

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. DS7T-15603-CA

Volkswagen Amarok Mk2 Keyless Entry Antenna Amplifier Module ECU DS7T-15603-CA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3C8971104C

VW Passat CC Rear Parking Sensor Wiring Loom Cable Harness 3C8971104C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5G0971104P

Volkswagen Golf R Mk7 Rear Bumper PDC Parking Sensor Wiring Harness 5G0971104P

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4H0959795B

VW Touareg 7L Rear Door Control Unit Module Left Right N/O/S ECU 4H0959795B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5WA959354

VW Volkswagen Golf Mk8 Air Module Control Unit Crash Impact Sensor 5WA959354

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. NU5T-14B531-JA

VW Amarok Mk2 Door Module Control Unit Front Rear Driver's Side NU5T-14B531-JA

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1T0909606

VW Volkswagen Touran 1T Air Module Control Unit Crash Impact Sensor 1T0909606

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3D0907539A

VW Volkswagen Phaeton 3D Dashboard Light Sun Solar Sensor Unit 3D0907539A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 141951253B-2

VW Volkswagen Audi Seat Skoda Relay Unit 4 Pins 12V 40A 141951253B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5G0971175C

Volkswagen Golf Mk7 Rear Tailgate Boot Lid Wiring Adapter Loom 5G0971175C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3c0937125

Volkswagen VW Passat B6 Fuse Box Relay Electrical Module Unit 3C0937125

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P0907311C-1

Volkswagen Touareg 7P 3.0 TDI CJMA 204HP Engine ECU Set 7P0907311C Automatic

€707.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0971693A

Volkswagen Tiguan 5N Rear Door Harness Cable Wiring Left Right N/O/S 5N0971693A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0907530H

Volkswagen Golf Mk5 Gateway Control Unit Module Controller 1K0907530H 1K0907951

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5K4971694AH

Volkswagen Golf Mk6 Door Wiring Loom Harness Rear Right O/S 5K4971694AH

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5K0971104B

Volkswagen Golf Mk6 Rear Tailgate Licence Plate Lighting Wiring Cable 5K0971104B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6R0937085D

Volkswagen Polo Mk5 Body Control Module Unit BCM Controller 6R0937085D

€75.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7N0937503A-1

Audi Q3 8U VW Scirocco Mk3 Relay Bracket Holder Box 7N0937503A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0927165A

Volkswagen Golf R Mk7 Fuse Box Cover Housing Closing Element Bracket 5Q0927165A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 191906383C-1

Audi VW Volkswagen Seat Skoda Relay Unit Module 4 Pins 191906383C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0971366AQ

Volkswagen Tiguan 5N Front Seat Wiring Loom Harness Right O/S 5N0971366AQ

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5G0971584G

Volkswagen Golf Mk7 T-Roc R Steering Wheel Air Module Wiring Loom 5G0971584G

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0971250CE

Volkswagen Jetta A6 Manual Gearbox Earth Line 1K0971250CE

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 14A919603

Volkswagen Crafter SY Touch Screen Radio MMI Display Screen 14A919603

€417.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7H1959843B

Volkswagen Transporter T5 T6 Roof Wiring Harness Grommet 7H1959843B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3D0919473-1

Volkswagen Touareg Al PDC Parking Aid System Display Panel Unit 3D0919473

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5H0907159A

Volkswagen Golf Mk8 R Impact Sound Control Module Unit 5H0907159A

€85.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0906093A

Audi A3 8V 8Y VW Golf 5G Fuel Pump Control Unit ECU 2.0 TSI Petrol 5Q0906093A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7L0937401-1

Volkswagen Touareg 7L Positive Cable Battery Point Box Jump Unit 7L0937401

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5H0945307A-2

VW Volkswagen Golf Mk8 CD1 Tail Light Lamp Wiring Inner Rear Left N/S 5H0945307A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 070971033A

VW Transporter T5 Injection Nozzle Wire Left N/S 2.5 TDI AXD AXE BLJ 070971033A

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0919283A

Volkswagen Touran 1T Parking Control Unit Module Sensor 1K0919283A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L903024M

Volkswagen Tiguan 5N Golf Mk5 Alternator Generator Diesel Power 03L903024M

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5H0945308A-2

Volkswagen Golf Mk8 CD1 Tail Light Lamp Wiring Inner Rear Right O/S 5H0945308A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0907361A

Volkswagen Golf Mk7 Leon Mk3 Fuse Relay Box Lid Cover 5Q0907361A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3D0951253A

VW Volkswagen Audi Seat Skoda Relay Black 5 Pins 12V 50A Set 433 3D0951253A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L906018PN

Volkswagen New Beetle Engine Control Unit ECU 140HP 2.0 CFFB Manual 03L906018PN

€189.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0971557AB

VW Golf Mk5 Front Door Wiring Loom Harness Cable Driver Side O/S 1K0971557AB

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03E971815A

Volkswagen Polo 6R Cover Wiring Loom Guide Bracket Trim 03E971815A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0959433CP

VW Caddy 2K Body Control Comfort Unit Module Convenience Unit 1K0959433CP

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3C0937125-1

VW Passat B6 Sharan 7N Fuse Box Relay Electrical Module Unit 3C0937125

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 070906016B

Volkswagen Phaeton 3D 5.0 V10 AJS 313HP Engine Control ECU 070906016B Automatic

€85.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 038907281D-1

Genuine VW Audi Seat Skoda Diesel Glow Plug Relay Unit Black 038907281D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1Q0919283A

Volkswagen Eos 1F Parking Aid PDC Sensor Control Unit Module ECU 1Q0919283A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3AA906337

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A9068200079-1

Mercedes W639 Stereo Radio CD Player Head Unit A9068200079

€32.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 5N0810773E

Volkswagen Tiguan 5N Fuel Filler Flap Actuator Release Servomotor 5N0810773E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5K0945094T-2

Volkswagen Golf Gti 5k Rear Lamp Inner Tailgate Right O/S Harness 5K0945094T

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

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