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 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

Part no. 8W6945093L-1

Audi A5 S5 F5 LED Tail Light Lamp Wire Harness Wiring Cable Left N/S 8W6945093L

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0959754C

Audi A5 8T 8F A6 S6 4G 3 Button Smart Remote Car Key Fob Sender Unit 8T0959754C

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F0907658

Audi A6 C6 Clutch Pedal Control Unit Module Sensor Switch 4F0907658

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F9910401-1

Audi A6 C6 3.0 TDI ASB 232HP Engine Control Unit ECU Kit 4F9910401 Automatic

€336.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A947356AB

Audi RSQ3 F3 Front Door LED Lighting Module Control Unit Right O/S 83A947356AB

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0907777L

Audi RS5 F5 Chassis Module Control Unit 8W0907777L

€313.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V0035398A

Audi A3 8V A-Pillar Speaker Tweeter Front Left Right N/O/S 8V0035398A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3Q0907566K

Audi Q3 F3 Lane Assist Module Blindspot Control Unit Right O/S 3Q0907566K

€89.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5QS959655A

Audi A3 S3 8Y Air Module Crash Impact Sensor Unit Control ECU 5QS959655A

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V4945069-2

Audi A3 8V Rear Tailg Light Wiring Harness Cable Left N/S 8V4945069

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0035192K

Audi A4 B9 Multimedia Stereo Sat Nav SD CD Player Radio Head Unit 8W0035192K

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8X0937124

Audi A1 8X Fuse Relay Box Module Control Unit 8X0937124

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3Q0907590K

Audi Q3 F3 Lane Assist Module Blindspot Control Unit Left N/S 3Q0907590K

€89.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G2907311G

Audi A7 4G 3.0 TDI 218HP Quattro Engine Control ECU Kit 4G2907311G Automatic

€588.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4N0959655J

Audi A6 C8 A7 4K Air Module Sensor Control Unit ECU 4N0959655J

€161.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0971104A

Audi A4 B9 Rear Bumper Cable PDC Parking Sensor Wiring Harness Loom 8W0971104A

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0959754Q

Audi S5 8T Remote Ignition Key Control Unit Smart Remote 8T0959754Q

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4E0972575

Audi A3 8V 8P A4 S4 B8 A8 D4 Wire Harness Cable Loom Wiring 4E0972575

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8U0971085P

Audi Q3 8U Front Bumper PDC Wiring Loom Harness Cable 8U0971085P

€99.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0907468D

Audi A4 B8 A5 8T Gateway Diagnostic Interface Control Unit Module ECU 8T0907468R

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8X0919475Q

Audi Q3 8U PDC Parking Distance Assistant Control Unit Module ECU 8X0919475Q

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0959754AD

Audi A5 S5 8T Remote Ignition Key Fob Control Unit Keyless 8K0959754AD

€61.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971036A

Audi A4 B8 Door Wiring Harness Cable Loom Front Right O/S 8K0971036B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971693B-1

Audi A4 B8 Rear Door Card Harness Wiring Cable Loom Left Right N/O/S 8K0971693B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0907285A

Audi A6 C8 Relay Holder Support Bracket Mount Carrier 4K0907285A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W5945092AA-1

Audi A4 B9 Sedan Rear Tail Light Lamp LED Wiring Outer Right O/S 8W5945092AA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F9945094B-2

Audi A6 C6 A6 4F Rear Light Lamp Tailgate Right O/S Inner Wire Loom 4F9945094B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0959595B

Audi A3 8V Rear Door Control Module Unit ECU Left Right N/O/S 5Q0959595B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0971029AQ

Audi Q5 8R Door Wiring Harness Loom Cable Front Driver's Side 8R0971029AQ

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W6971104G

Audi A5 S5 RS5 F5 Rear Bumper Wiring Harness Set PDC Parking Sensor 8W6971104G

€61.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0907719B

Audi A3 8P Anti Theft Alarm System Control Module Unit ECU 1K0907719B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0035192E

Audi A4 B9 Multimedia Stereo Sat Nav SD CD Player Radio Head Unit 8W0035192E

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0035446A

Audi A7 4G Antenna Signal Amplifier Control Unit ECU 4H0035446A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G8971693C

Audi A7 4G Door Wiring Harness Cable Loom Rear Left Right N/O/S 4G8971693C

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 420919275-PHB1

Audi A5 8T Parking Distance PDC Rear Ultra Sonic Sensor Phantom Black - Z9Y

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06N971627B

Audi A3 8Y Engine Injector Module Wiring Harness Cable 2.0 TFSI 06N971627B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0955557C

Audi A4 B8 Crash Impact Sensor Unit Air Module 8K0955557C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0907468J

Audi A4 B9 Gateway Control Unit Module ECU 8W0907468J

€341.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G8971085CE

Audi A7 4G8 Rear Bumper Parking Sensor Wiring Loom 4G8971085CE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0906093

Fuel Pump Control Audi TT FV A3 8V Petrol Engine Unit Module 5Q0906093

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0959793R

Audi A8 D4 4H Front Door Control Module Unit ECU Driver's Side 4H0959793R

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8P4971693M

Audi A3 8P Door Wiring Harness Loom Cable Rear Left Right N/O/S 8P4971693M

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0915429

Audi A6 C8 Battery Positive Terminal Cover Trim Panel 4K0915429

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G8971035AJ

Audi A7 4G8 Front Door Harness Wiring Loom Cable Driver's Side 4G8971035AJ

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E5945094A-1

Audi A4 B7 Tail Light Side Panel Lamp Cable Wiring Rear Right O/S 8E5945094A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8D0951253A

Audi A6 C6 Multi Use Relay Unit Module 4 Pins 373 8D0951253A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8P4971693P

Audi A3 8P Door Wiring Harness Loom Rear Left Right N/O/S Cabling 8P4971693P

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0907468AE

Audi A5 8T 2.0 TDI Gateway Control Module Unit ECU 8R0907468AE

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0959792P

Audi A5 8T Front Door Control Module Right O/S Passenger Side 8T0959792Q

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G8971029DQ

Audi A7 4G8 Front Door Harness Wiring Loom Cable Driver's Side 4G8971029DQ

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0971230FP

Battery Cable Audi A3 8V Starter Alternator Wiring Harness 5Q0971230FP

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5QF971345

Audi RSQ3 F3 Positive Plus + Battery Wiring Harness Cable Power 5QF971345

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T8035570-1

Audi A4 B8 Radio Antenna Noise Signal Disturbance Suppressor 8T8035570

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0959795C

Audi A5 8T Rear Door Control Module Unit Left Right N/O/S 8T0959795C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 420971036

Audi R8 42 Front Door Wiring Harness Cable Loom Right O/S 420971036

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L1937503

Audi Q7 4L Fuse Relay Box Module Electrical Control Unit 4L1937503

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K5971693BA

Audi A6 C8 Door Wiring Harness Cable Loom Rear Left Right N/O/S 4K5971693BA

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G8971036K

Audi A7 4G8 Front Door Harness Wiring Loom Cable Passenger Side 4G8971036K

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G2907311C-1

Audi A7 4G8 3.0 TDI CRTE 218HP Quattro Engine ECU Kit 4G2907311C BCM2 + 2 Keys

€664.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83F971104F

Audi Q3 F3 Rear Bumper PDC Wiring Loom Cabling Parking Sensor 83F971104F

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8S0035021E

Audi TT FV Mk3 Navi SD GPS MMI Multimedia Head Unit Module 8S0035021E

€664.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0035502A

Audi A6 C8 A7 4K Centre Console Wireless Charging Station 4K0035502A

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0962239

Audi A5 S5 F5 Boot Trunk Lid Tailgate Opening Sensor Line Harness Wire 8W0962239

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4E0035652E

Audi A6 C6 MMI Multimedia Sat Nav Navigation Control Head Unit 4E0035652E

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 81A971035AP

Audi Q2 GA Front Door Wiring Harness Loom Cable Driver Side 81A971035AP

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G5945093A-2

Audi A6 C7 Rear Tail Light Lamp LED Wiring Cable Inner Left N/S 4G5945093A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E0907637A

Audi A6 C5 Yaw Sensor ESP Rotation Rate Control Unit Module 8E0907637A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0907274

Audi TT 8J Tyre Pressure Control Module Unit 8J0907274

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 81A971687N

Audi Q2 GA Door Wiring Loom Harness Cable Rear Right Left N/O/S 81A971687N

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0941828

Audi A4 B9 A5 F5 Fuse Box Battery Terminal Housing 3.0 TDI 8W0941828

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0906121C

Fuel Pump Control Audi A4 B9 A5 F5 A6 C8 Pump Unit Module ECU 4K0906121C

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4M0907508

Audi A6 C8 Acceleration Crash Impact Sensor Control Unit 4M0907508

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 028903018X

Audi A3 8L Seat Ibiza Mk2 VW Polo Mk3 Alternator Generator 028903018X

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0959435C

Audi A3 8V VW Golf Mk7 Kessy Module Keyless Go Entry Control Unit 5Q0959435C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 82G971036A

Audi A1 GB Mk2 Door Wiring Loom Harness Cable Front Passenger Side 82G971036A

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4KE907468C

Audi A6 C8 Q7 4M Gateway Interface Control Unit Module ECU 4KE907468C

€237.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0057186Q

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

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0907568A

Audi Q7 4L Blind Spot Monitoring Radar Unit 4L0907568A

€80.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 82C971030G

Audi A1 GB Sportback Front Door Wiring Loom Harness Passenger Side 82C971030G

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V4971035BG

Audi A3 8V Door Trim Panel Wiring Loom Harness Front Driver's Side 8V4971035BG

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8S0035466

Audi TT FV 8S Premium Loudspeaker System Amplifier Bang & Olufsen 8S0035466

€1,329.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0959795N

Audi A4 B8 Rear Door Control Module Unit Left Right N/O/S 8T0959795N

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0919283G

Seat Ateca Skoda Fabia Mk4 Superb Mk3 Parking Distance Control Module 5Q0919283G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8U0945093H-1

Audi Q3 8U Rear Tail Light Lamp Wiring Cable Inner Left N/S LED 8U0945093H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G8959795J

Audi A7 4G8 Rear Door Module Control Module Unit Left Right N/O/S 4G8959795J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K5962239

Audi A6 C8 Tailgate Opening Steering Line D Pulse Generator Flap 4K5962239

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8P0919475H

Audi A3 8P PDC Parking Assistance Distance Control Module Unit ECU 8P0919475H

€161.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3Q0937125C

Audi RS3 F3 RSQ3 F3 Fuse Box Housing Module Left N/S 2.5 TFSI 3Q0937125C

€99.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 81A919604A

Audi Q2 GA Sat Nav Radio Head Unit Multimedia Display Screen 81A919604A

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8Y0035465

Audi A3 8Y A4 B9 Q5 FY Harman Speaker Amplifier Booster Sound System 8Y0035465

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0945096C-3

Audi TT 8J Rear Tail Lamp Light Wiring Harness Cable Plug Right O/S 8J0945096C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0971029AE

Audi A5 S5 8T Coupe Front Door Wiring Loom Harness Driver's Side 8T0971029AE

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1J0972732

Audi Q7 4L Rear Tail Light Lamp Bulb Connector Wiring Left Right N/O/S 1J0972732

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8X0915459

Audi A1 8X Positive Battery Overload Protection 8X0915459

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0907063CF

Audi A4 B9 Body Control Comfort Unit Module BCM Unit ECU 8W0907063CF

€80.95

Free delivery: Aug 10 – 11

If paid before 14:00

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