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 A4 B8 Air Suspension Module Regulation Control Unit 6C0907359

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PLN 54.10

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Part no. 3Q0959435L

Entry Keyless Audi A3 S3 RS3 8V Kessy Control Module Unit ECU 3Q0959435L

PLN 56.95

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Part no. 8E0857925C

Audi A3 8P A4 B7 Glovebox Compartment Ipod Interface Connector 8E0857925C

PLN 61.95

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Audi A5 8T Front Door Wiring Harness Loom Cable Passenger's Side 8T8971030AQ

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Part no. 8T8971030AQ

Audi A5 8T Front Door Wiring Harness Loom Cable Passenger's Side 8T8971030AQ

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PLN 90.20

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Part no. 8W0971693AB

Audi A4 B9 Rear Door Card Loom Wiring Loom Harness Cable 8W0971693AB

PLN 99.95

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Audi A3 8V Air Module Control Sensor ECU Unit 5Q0959655L

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Part no. 5Q0959655L

Audi A3 8V Air Module Control Sensor ECU Unit 5Q0959655L

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PLN 181.86

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Audi A3 8V Radio CD SD SIM Player Stereo Sat Nav Head Unit 81A035192B

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Part no. 81A035192B

Audi A3 8V Radio CD SD SIM Player Stereo Sat Nav Head Unit 81A035192B

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PLN 1,804.95

PLN 1,082.97

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Part no. 8K0907064AQ

Audi A4 B8 A5 8T Q5 8R Body Control Comfort Module BCM ECU 8K0907064AQ

PLN 113.95

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PLN 42.95

PLN 40.80

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Part no. 8P0862335M

Audi A4 B7 RS3 8P R8 42 TT 8J Bluetooth Interface Module Unit MMI 8P0862335M

PLN 46.95

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Audi A4 B8 2.0 TDI CJCB Engine Control Unit Module ECU Kit 03L906018JR Manual

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Part no. 03L906018JR-1

Audi A4 B8 2.0 TDI CJCB Engine Control Unit Module ECU Kit 03L906018JR Manual

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PLN 569.97

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Part no. 4N0035446

Audi A3 RS3 8V Aerial Antenna Amplifier Control Module Unit 4N0035446

PLN 474.95

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Audi Q3 F3 LED Rear Door LED Lighting Module Control Unit Left N/S 83A947356J

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Part no. 83A947356J

Audi Q3 F3 LED Rear Door LED Lighting Module Control Unit Left N/S 83A947356J

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PLN 58.85

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Part no. 8K5945095AC-1

Audi A4 B8 Rear Tail Light LED Wiring Harness Cable Plug Left N/S 8K5945095AC

PLN 46.95

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Audi A6 C6 Antenna Amplifier Control Unit Module ECU 4F9035225D

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Part no. 4F9035225D

Audi A6 C6 Antenna Amplifier Control Unit Module ECU 4F9035225D

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PLN 40.80

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Audi Q5 Mk2 FY Aerial Antenna Amplifier Module Unit 80A035225Q

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Audi Q5 Mk2 FY Aerial Antenna Amplifier Module Unit 80A035225Q

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PLN 90.20

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Part no. 8K0971095

Audi A4 B8 Front Bumper PDC Wiring Park Assist Sensor Harness 8K0971095

PLN 132.95

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PLN 189.95

PLN 113.97

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Part no. 8W0971534

Audi S5 F5 Earth Line Voltage Converter Starter Alternator Harness 8W0971534

PLN 75.95

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Part no. 04E971067-1

Audi A1 S1 8X VW Golf 5G Adapter Wire Engine Wiring Harness 1.4 TFSI 04E971067

PLN 180.95

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Audi VW Volkswagen Seat Relay Unit Module 4 Pins 12V 4D09907131

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Part no. 4D0907131

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 12V 4D09907131

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PLN 58.85

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Audi A3 S3 RS3 8V Gateway Control Module GW MQB Mid Unit ECU 5Q0907530AH

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Part no. 5Q0907530AH

Audi A3 S3 RS3 8V Gateway Control Module GW MQB Mid Unit ECU 5Q0907530AH

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PLN 72.15

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Part no. 8R2035195

Audi A5 8T Radio CD Player Head Unit Control Panel Switch 8R2035195

PLN 156.95

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

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Part no. 8W0971235A

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

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PLN 45.55

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Audi A5 8F Front Door Wiring Loom Harness Cable Driver's Side 8F0971029BD

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Audi A5 8F Front Door Wiring Loom Harness Cable Driver's Side 8F0971029BD

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PLN 237.95

PLN 142.77

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Part no. 82A971589B

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

PLN 46.95

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Part no. 8K0971035AS

Audi RS4 B8 Door Wiring Harness Cable Loom Front Left N/S 8K0971035AS

PLN 46.95

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Part no. 8T0971030C

Audi A5 8T Coupe Front Door Wiring Loom Harness Passenger Side 8T0971030C

PLN 70.95

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Part no. 8W0971227A

Audi A4 S4 8W A5 S5 F5 Battery Wiring Harness Cable Loom Distributor 8W0971227A

PLN 284.95

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Audi A3 S3 8Y Fuse Box Control Module Relay Box Electrical Unit 5WA937615

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Part no. 5WA937615

Audi A3 S3 8Y Fuse Box Control Module Relay Box Electrical Unit 5WA937615

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PLN 45.55

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Part no. 8T2035186C

Audi A4 B8 A5 8T Radio Media Player Audio CD Head Unit Player Concert 8T2035186C

PLN 237.95

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Audi A6 C7 Aerial Roof Booster Antenna Amplifier AMP 4G5035225

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Part no. 4G5035225

Audi A6 C7 Aerial Roof Booster Antenna Amplifier AMP 4G5035225

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PLN 44.60

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Audi A4 B8 2.0 TDI CNHA 190HP Quattro Engine Control ECU Kit 04L906021BH Manual

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Part no. 04L906021BH-1

Audi A4 B8 2.0 TDI CNHA 190HP Quattro Engine Control ECU Kit 04L906021BH Manual

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PLN 683.97

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Part no. 8W6971104T

Audi A5 F5 Rear Bumper PDC Parking Sensor Wiring Loom Harness 8W6971104T

PLN 270.95

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Audi S3 8P Xenon Headlight Range Control Module Unit ECU 8P3907357B

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Part no. 8P3907357B

Audi S3 8P Xenon Headlight Range Control Module Unit ECU 8P3907357B

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PLN 46.95

PLN 44.60

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Part no. 4F0959792R

Audi A6 C6 Front Door Left N/S Module Unit Control ECU 4F0959792R

PLN 47.95

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Part no. 03L906018AC-1

Audi A4 B8 A5 8T 2.0 TDI CJCA 143HP Engine Control ECU Kit 03L906018AC Manual

PLN 569.95

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Audi RS4 B8 Starter Motor Petrol Engine Electrical Unit Actuator 079911021G

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Part no. 079911021G

Audi RS4 B8 Starter Motor Petrol Engine Electrical Unit Actuator 079911021G

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PLN 75.95

PLN 64.56

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Audi A6 C6 3.0 TDI Suppression Condenser Noise Filter 4F0903291

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Part no. 4F0903291

Audi A6 C6 3.0 TDI Suppression Condenser Noise Filter 4F0903291

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PLN 42.95

PLN 40.80

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Part no. 8W0971030CF

Audi A4 B9 Front Door Wiring Loom Electric Harness Passenger Side 8W0971030CF

PLN 118.95

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Audi Q5 FY Rear Door Control Module Unit Left Right N/O/S 8W1959595

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Part no. 8W1959595

Audi Q5 FY Rear Door Control Module Unit Left Right N/O/S 8W1959595

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PLN 90.20

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Part no. 8W0947355C

Audi A5 S5 F5 Door Panel LED Module Light Unit Wiring Front Right O/S 8W0947355C

PLN 46.95

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Audi A5 S5 S5 8T 4.2 FSI Alternator Bracket Mount Holder 079903805AF

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Part no. 079903805AF

Audi A5 S5 S5 8T 4.2 FSI Alternator Bracket Mount Holder 079903805AF

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PLN 42.95

PLN 40.80

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Part no. 4M0971237S

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

PLN 161.95

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Part no. 8J0971615B

Audi TT TTRS 8J Front Gearbox Wiring Harness Cable Guide Left N/S 8J0971615B

PLN 51.95

Delivery: Oct 20

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Audi Q7 4L On Board Power Supply Control Module Unit ECU 4F0907280E

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Part no. 4F0907280E

Audi Q7 4L On Board Power Supply Control Module Unit ECU 4F0907280E

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PLN 46.95

PLN 44.60

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Audi TT 8S Headlight Head Light Lamp Range Control Unit Module ECU 4H4907357G

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Part no. 4H4907357G

Audi TT 8S Headlight Head Light Lamp Range Control Unit Module ECU 4H4907357G

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PLN 260.95

PLN 221.81

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Part no. 8W0035305

Audi S4 B9 S5 8F Sound Actuator Engine Sound Booster Generator 8W0035305

PLN 949.95

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

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Part no. 5F4971693

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

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PLN 40.80

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Part no. 8T8945095D-2

Audi A5 8T Tail Light Lamp Wiring Plug Socket Rear Left N/S 8T8945095D

PLN 46.95

Delivery: Oct 20

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Audi A4 B9 Wireless Charger Centre Console Phone Charging Module 8W0035502B

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Part no. 8W0035502B

Audi A4 B9 Wireless Charger Centre Console Phone Charging Module 8W0035502B

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PLN 118.95

PLN 101.11

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Audi A4 S4 B9 Front Windscreen Windshield Lane Assist Camera 8W0907217C

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Part no. 8W0907217C

Audi A4 S4 B9 Front Windscreen Windshield Lane Assist Camera 8W0907217C

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PLN 94.95

PLN 56.97

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Part no. 03G903016N

Audi A6 C6 2.0 TDI Alternator Generator 180A 14V Diesel Engine Unit 03G903016N

PLN 189.95

Free delivery: Oct 20

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Part no. 4H0945095H-2

Audi A8 D4 Rear Outer Tail Light Lamp LED Wiring Cable Left N/S 4H0945095H

PLN 56.95

Delivery: Oct 20

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Part no. 8X0035110C

8X0035110C A1 8X A4 B8 A5 8T CD Player Changer 6 Disc 8X0035110C

PLN 66.95

Free delivery: Oct 20

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Seat Ibiza Skoda Fabia Volkswagen Polo Mk5 6R 1.2 Petrol Alternator 03D903025J

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Part no. 03D903025J

Seat Ibiza Skoda Fabia Volkswagen Polo Mk5 6R 1.2 Petrol Alternator 03D903025J

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PLN 142.95

PLN 121.51

Free delivery: Oct 20

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Audi Q5 8R Negative Battery Terminal Cable Wiring Battery 8R0915181

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Part no. 8R0915181

Audi Q5 8R Negative Battery Terminal Cable Wiring Battery 8R0915181

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PLN 46.95

PLN 44.60

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Part no. 4G2907311C-2

Audi A6 C7 3.0 TDI CRTE 218HP Quattro Engine ECU Control Module 4G2907311C

PLN 759.95

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Audi A5 F5 HV Battery Negative Cable Terminal 8W0915181A

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Part no. 8W0915181A

Audi A5 F5 HV Battery Negative Cable Terminal 8W0915181A

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PLN 46.95

PLN 44.60

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Part no. 8T0971365H

Audi A5 8F Seat Cable Front Wiring Loom Harness Left Right N/O/S 8T0971365H

PLN 94.95

Free delivery: Oct 20

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Part no. 8K9945096-2

Audi A4 B8 Estate Tail Light Rear Right O/S Boot Light Wire Harness 8K9945096

PLN 161.95

Free delivery: Oct 20

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Part no. 4F1941824-1

Audi Q7 4L Fuse Box Control Module Connector Plug Socket Wiring Loom 4F1941824

PLN 46.95

Delivery: Oct 20

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Audi A6 C8 A7 4K Door Module Rear Left Right N/O/S Control Unit ECU 4M1959595K

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Part no. 4M1959595K

Audi A6 C8 A7 4K Door Module Rear Left Right N/O/S Control Unit ECU 4M1959595K

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PLN 237.95

PLN 142.77

Free delivery: Oct 20

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Part no. 4E1910559E

Audi A8 D3 3.2 FSI Quattro BPK 260HP Engine Control ECU 4E1910559E Automatic

PLN 474.95

Free delivery: Oct 20

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Audi A1 8X Front Door Card Wiring Harness Loom Cable Left N/S 8X0971036T

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Part no. 8X0971036T

Audi A1 8X Front Door Card Wiring Harness Loom Cable Left N/S 8X0971036T

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PLN 61.95

PLN 58.85

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Audi S5 A5 8F Front Door Trim Wiring Harness Cable Loom Left N/S 8F0971035F

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Part no. 8F0971035F

Audi S5 A5 8F Front Door Trim Wiring Harness Cable Loom Left N/S 8F0971035F

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PLN 161.95

PLN 137.66

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Part no. 8T8945096D-2

Audi A5 8T Tail Light Lamp Side Panel Rear Right O/S Harness Wire 8T8945096D

PLN 46.95

Delivery: Oct 20

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

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Part no. 1K0907361B

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

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PLN 61.95

PLN 58.85

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Audi A4 B8 A5 8T 2.0 TDI Quattro CAHA 170HP Engine ECU Kit 03L906022RM Manual

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Part no. 03L906022RM-2

Audi A4 B8 A5 8T 2.0 TDI Quattro CAHA 170HP Engine ECU Kit 03L906022RM Manual

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PLN 807.95

PLN 484.77

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Part no. 8F0959729

Audi A5 S5 8F Rear Window Regulator Control Unit Bracket Holder Mount 8F0959729

PLN 51.95

Delivery: Oct 20

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PLN 1,139.95

PLN 683.97

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Part no. 8U0907404A

Audi RSQ3 8U 2.5 TFSI CTSA 310HP Quattro Engine Control Unit ECU 8U0907404A

PLN 4,559.95

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Part no. 4F0971547

Audi A6 C6 Cable Wiring Loom Heater Matrix Air Conditioning Cable 4F0971547

PLN 51.95

Delivery: Oct 20

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Audi A7 4G Rear Door Wiring Harness Cable Left Right N/O/S 4G8971687CH

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Part no. 4G8971687CH

Audi A7 4G Rear Door Wiring Harness Cable Left Right N/O/S 4G8971687CH

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PLN 142.95

PLN 121.51

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Part no. 8H1971035CR

Audi A4 S Line Door Wiring Harness Cable Front Passenger 8H1971035CR 8H1971035CS

PLN 165.95

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Audi A1 8X Fuse Box Relay Control Unit Module Bracket Holder 8X0971845C

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Part no. 8X0971845C

Audi A1 8X Fuse Box Relay Control Unit Module Bracket Holder 8X0971845C

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PLN 94.95

PLN 80.71

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Audi Q5 FY Keyless Entry Amplifier Control Box Module Aerial Antenna 80A907247A

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Part no. 80A907247A

Audi Q5 FY Keyless Entry Amplifier Control Box Module Aerial Antenna 80A907247A

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PLN 42.95

PLN 40.80

Delivery: Oct 20

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Part no. 420907560-1

Audi R8 42 Engine Control Unit ECU BCM Key 4.2 Petrol 419HP BYH 420907560 Kit

PLN 15,199.95

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Part no. 8H0035225K

Audi A4 S4 B6 B7 Cabrio Aerial Amplifier Attachment Parts Left N/S 8H0035225K

PLN 398.95

Free delivery: Oct 20

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Part no. 5WA919275B-KYG

Audi A3 S3 8Y PDC Parking Distance Sensor 5WA919275C Kyalami Green - Z6A

PLN 56.95

Delivery: Oct 20

If paid before 14:00

Promo price

PLN 189.95

PLN 113.97

Free delivery: Oct 20

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Part no. 8X0971029D

Audi A1 8X Door Loom Wiring Harness Cable Front Driver Side O/S 8X0971029D

PLN 118.95

Free delivery: Oct 20

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Part no. 83A907159

Audi Q3 RSQ3 F3 Body Sound Impact Control Module ECU 83A907159

PLN 336.95

Free delivery: Oct 20

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