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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Audi TT FV 8S A/C Air Condition Climate Control Module Unit ECU 8S0820047

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0035462-1

Audi A5 8T MMI Multimedia Interface Unit Module Control ECU 8T0035462

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 82A945094C-2

Audi A1 GB Rear LED Tail Light Lamp Wiring Plug Cable Right O/S 82A945094C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V4971035A

Audi A3 8V Front Door Wiring Loom Harness Cable Driver Side 8V4971035A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5N0035554J

Audi Q7 4L VW Passat A3 Touareg 7P Multimedia Interface Cable Media 5N0035554J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F9035225D

Audi A6 C6 Antenna Amplifier Control Unit Module ECU 4F9035225D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8S0907159B

Audi TT FV Acoustic Controller Control Module Unit ECU 8S0907159B

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0959655C

Audi Q7 4L Air Module Control Unit ECU Impact Sensor 4L0959655C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0937530

Audi Q7 4M Fuse Box Module Holder Relay Box 8W0937530

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W5035021

Audi A4 B9 Multimedia MMI Radio SD Player Stereo Sat Nav Head Unit 8W5035021

€659.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E0907307D

Audi A4 B7 Servotronic Steering Control Unit Module 8E0907307D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W6945093D-2

Audi S5 F5 Inner Rear Tail Light Lamp Wiring Cable Left N/S 8W6945093D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0959795Q

Audi A5 B8 8T Door Module Control Unit Left Right N/O/S 8T0959795Q

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A947356A

Audi Q3 F3 LED Front Door LED Lighting Module Control Unit Right O/S 83A947356A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8D0951253A-1

VW Audi Seat Skoda Multi Use Relay Module 4 Pins 373 Black 12V 40A 8D0951253A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V4971030

Audi A3 8V Front Door Wiring Loom Harness Passenger Side 8V4971030

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0941004BB-2

Audi A5 8T Front Right Halogen Headlight Headlamp Wiring Right O/S 8T0941004BB

€23.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 4F0959655E

Audi A6 C6 SRS Crash Air Module Safety ECU Unit Control 4F0959655E

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 420035503-1

Audi R8 42 GSM Antennna Receiver Amplifier Radio 420035503

€213.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0035670P

Audi A8 S8 4H A8 D4 MMI Control Unit Player MMI 3G+ SAT NAV Bluetooth 4H0035670P

€237.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5F4971693

Audi A1 8X Door Window Switch Loom Cable Rear Left Right N/O/S 5F4971693

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8X0919475AE

Audi A1 8X PDC Assistance Parking Distance Control Module Unit ECU 8X0919475AE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0941006D-2

Audi A5 8T Front Headlight Wiring Loom Harness Cable Right O/S 8T0941006D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A947356C

Audi Q3 F3 LED Front Door LED Lighting Module Control Unit Right O/S 83A947356C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 82A945091C-2

Audi A1 GB Rear LED Tail Light Lamp Wiring Plug Cable Left N/S 82A945091C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 057911022

Audi Q7 4M Engine Starter Motor Actuator Starter Valeo 3.0 TDI Diesel 057911022

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 431951253H

Audi TT 8N A4 B5 A6 C5 A8 D2 Relay Control Unit Module 12V 4 Pins 431951253H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 0CJ927749A

Audi A6 C8 Transfer Box Control Unit Four-Wheel Drive Module ECU 0CJ927749A

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 82G971688F

Audi A1 GB Mk2 Rear Door Wiring Loom Harness Cable Right O/S Side 82G971688F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8P0862335F

Audi A3 8P A4 B7 Bluetooth Module Interface Control Unit Hands Free 8P0862335F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4E0941817

Audi A6 A8 Q7 CAN Bus Jumper Contact Bridge Connector 4E0941817

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0915181F

Audi A6 C8 50 TFSIe Hybrid Negative Battery Wiring Terminal Monitor 4K0915181F

€151.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5WB959107A

Skoda Octavia Mk4 Tailgate Control Module Unit ECU 5WB959107A

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0951253-2

Audi VW Volkswagen Seat Relay 643 Unit Module 4 Pins Set X3 8K0951253

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0971035A

Audi A5 8T Coupe Front Door Wiring Loom Harness Driver's Side 8T0971035A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0971235A

Audi A4 B9 Negative Battery Terminal Cable Harness Wiring Loom 8W0971235A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E1910115A

Audi A4 B7 Quattro Engine Control Unit ECU 2.0 TFSI 200HP BWE 8E1910115A

€80.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3AD972695

Audi A4 B7 Wiring Loom Harness Plug Socket Wiring 3AD972695

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3Q0907530F

Audi A3 8V Skoda Superb 3V Gateway Control Module ECU Unit 3Q0907530F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0919275B-BLK

Audi Q2 GA Front Parking Sensor Assist Control Module Black 5Q0919275B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G8907472

Audi A7 4G8 Dynamic Flashing LED Headlight Lamp Control Module Unit 4G8907472

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0941824

Audi A5 8T A6 C6 A7 4G Relay Fuse Box Connector Socket Module Unit 8K0941824

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F0051510K

Audi Cable Adapter iPod Connection 4F0051510K

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906018DT

Audi TT 8J 2.0 TDI 170HP CFGB Quattro Engine ECU Unit 03L906018DT Manual

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4E0862335

Audi A6 C6 Bluetooth Multimedia Control Module Unit ECU 4E0862335

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0941828

Audi A6 C8 Fuse Box Relay Control Unit Module 4K0941828

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06E971821F

Audi S4 B8 S5 8F Ignition Wiring Harness Guide Trim 3.0 TFSI 06E971821F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T8971029AQ

Audi A5 S5 8T Front Door Wiring Loom Harness Cable Driver's Side 8T8971029AQ

€61.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 82A919604B

Audi A1 GB Mk2 Display Monitor Screen Sat Nav Multimedia Control Unit 82A919604B

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0907107E

Audi A6 C7 A7 4G Image Processing Control Unit Module 4G0907107E

€99.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8P0035535

Audi A4 B7 Amplifier Bracket Aerial Antenna Module Mount Holder 8P0035535

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4E0907719

Audi A8 S8 D3 Alarm Module Tow Protection Signal Control Unit Block 4E0907719

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0959793K

Audi A4 B8 A5 8T Door Control Unit Module Front Driver's Side 8T0959793K

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0035670R

Audi A8L 4H Multimedia Radio Sat Nav CD Player SD SIM Head Unit 4H0035670R

€455.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K8971036K

Audi A6 C8 Door Trim Panel Wiring Harness Loom Front Left N/S 4K8971036K

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06L911024

Audi A4 B9 A5 F5 Starter Motor DENSO 12V 06L911024

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L903017

Audi A4 S4 8K A5 S5 8T 8F Alternator 150A 14V 2.0 TDI Diesel CGLC 04L903017

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0906093D

Audi A4 B9 Fuel Pump Control Unit Module ECU 8W0906093D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V4971687K

Audi A3 RS3 8V 5Dr Door Harness Loom Wiring Rear Left Right N/O/S 8V4971687K

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5WA962133F

Audi Volkswagen Seat Keyless Entry Module Aerial Antenna 5WA962133F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T8971845

Audi A5 8T Fuse Box Relay Control Unit Module 8T8971845

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A035842A

Audi A1 GB Mk2 Multimedia Sat Nav Radio Head Unit Controller 83A035842A

€156.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L906021CK

Audi Q5 8R 2.0 TDI CNHA Quattro 190HP Engine Unit ECU Kit 04L906021CK Automatic

€450.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L906021CA

Audi A4 B8 2.0 TDI CSUA 150HP Engine Control Unit ECU 04L906021CA Automatic

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06E971821

Audi A4 B7 Ignition Wiring Harness Guide Trim 3.2 FSI AUK 06E971821 06E971822

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4N1907468AB

Audi A6 C8 Gateway Module Diagnosis Interface Control Unit 4N1907468AB

€237.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G9945096B-1

Audi A6 C7 Rear Tail Light Wire Wiring Cable Right O/S 4G9945096B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0035502B

Audi A5 F5 A6 C8 Wireless Centre Console Phone Charging Module Unit 4K0035502B

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W8971036E

Audi A5 S5 RS5 F5 Door Wire Harness Wiring Front Right O/S 8W8971036E 8W8971036G

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 420919275-BLM

Audi A5 8T Rear Bumper PDC Parking Distance Sensor Black Magic Pearl - C9Z

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03G903016L-1

Audi A6 C6 FL CAGB Diesel Engine Alternator Generator Bosch 14V 180A 03G903016L

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 07K903023F

Audi RS3 8P RSQ3 8U Alternator Generator BOSH 14V 140A 07K903023F

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0907589C

Audi A7 4G 3.0TDI CGQB 313HP Quattro Engine Control ECU 4G0907589C Automatic

€203.95

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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 8T0945094C-2

Audi A5 8T Rear Tail Light Wiring Loom Harness Cable Plug Right O/S 8T0945094C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1H0911251

Audi Volkswagen Seat Skoda Relay 5 Pin 12V 10A 1H0911251

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0971235J

Audi A3 Volkswagen Golf Battery Wire Cable Negative Earth Lead 1K0971235J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0907274B

Audi TT 8J Tyre Pressure Control Module Unit 8J0907274B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F0907274

Audi A6 S6 4F Q7 4l Tyre Pressure Control Module Unit ECU 3.0 TDI CJGA 4F0907274

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F1941824A

Audi A5 F5 Fuse Box Control Module Connector Plug Socket Wiring Loom 4F1941824A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 80A907247

Audi SQ5 FY Line Keyless Entry Antenna Control Module 80A907247

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

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