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

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1J0941385A

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 1K0971250AD

Audi A3 Volkswagen Golf Battery Wire Cable Negative Earth Lead 1K0971250AD

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4F0905852D

Audi Q7 4L Steering Column Lock Mechanism Control Unit Module ECU 4F0905852D

€56.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8Y0962239

Audi A3 8Y Electric Boot Lid Tailgate Sensor Wiring Harness Cable 8Y0962239

€70.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8V0035382B

Audi A3 8V Rear Center Low Bass Tweeter Speaker Subwoofer Unit 40W 8V0035382B

€51.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 1H0911251

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0971235J

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0937084CP

Audi S3 8V Module BCM Body Control Unit Module ECU 5Q0937084CP

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0907530J

Audi A3 8P Body Gateway Module ECU Control Unit 1K0907530J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0907274B

Audi TT 8J Tyre Pressure Control Module Unit 8J0907274B

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 80A907247

Audi SQ5 FY Line Keyless Entry Antenna Control Module 80A907247

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P0959802K

Audi A3 8P Door Window Lifter Regulator Motor Front Left N/S 8P0959802K

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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

€37.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8W0907777L

Audi RS5 F5 Chassis Module Control Unit 8W0907777L

€313.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8F0959729

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 5QS959655A

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

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3Q0959435L

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8W0971030CF

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

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G8959107H

Audi A7 4G Electric Tailgate Bootlid Control Module Unit 4G8959107H

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8X0937124

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8K0959754Q

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

€56.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8T0907468D

Audi A4 B8 A5 8T Gateway Diagnostic Interface Control Unit Module ECU 8T0907468D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4E0035061B

Audi A8 D3 Radio Multimedia Audio Stereo Head Unit 4E0035061B

€336.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L906019AS-2

Audi Q5 8R 2.0 TDI 170HP Quattro Engine Control Module ECU 03L906019AS Automatic

€427.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0959754AD

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

€61.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G8971085A

Audi A7 4G Rear Bumper Parking Sensor Wiring Loom Harness Wire 4G8971085A

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4G8959252A

Audi A7 4G8 Sportback Rear Spoiler Adjustment Tailgate Control Unit 4G8959252A

€137.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0907285A

Audi A6 C8 Relay Holder Support Bracket Mount Carrier 4K0907285A

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8U0971036G

Audi RS Q3 8U Front Door Wiring Harness Loom Wire Passenger Side 8U0971036G

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J8035382A-1

Audi TT 8J TT S Line Rear Door Bose Subwoofer Loud Speaker Left N/S 8J8035382A

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 06H903018L

Audi A6 C7 A7 4G S6 Alternator Generator 12V 180A 06H903018L

€118.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 1K0907719B

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4H0035446A

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059911021G

Motor Starter Audi A7 4G Q5 8R 3.0TDI Diesel Engine Starter Unit 059911021G

€47.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 03G903016F

Audi A4 B8 2.0 TDI Alternator Generator 150A Diesel Engine Unit 03G903016F

€94.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8K0955557C

Audi A4 B8 Crash Impact Sensor Unit Air Module 8K0955557C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0959792B

Audi A4 B8 Door Module Control Unit ECU Front Passenger Side 8K0959793B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0907468J

Audi A4 B9 Gateway Control Unit Module ECU 8W0907468J

€341.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G8971085CE

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

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4L0971597

Audi Q7 4L Negative Battery Terminal Cable Wiring 4L0971597

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0035223AL

Audi A4 B8 Q5 8R Amplifier Audio Sound Booster Module 8T0035223AL

€279.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6R0971537R

Audi A1 S1 8X Skoda Fabia Battery Terminal Negative Earth Cable 6R0971537R

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 4K0915429

Audi A6 C8 Battery Positive Terminal Cover Trim Panel 4K0915429

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8D0951253A

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0971030AJ

Audi Rs Q3 8U Front Door Wiring Loom Cable Passenger Side 8U0971030AJ

€32.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 03L906018DT-2

Audi TT 8J 2.0 TDI Quattro 170HP CFGB Engine ECU Kit BCM Key 03L906018DT Manual

€132.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0907468AE

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

€66.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 5Q0971230FP

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5QF971345

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

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T8035570-1

Audi A4 B8 Radio Antenna Noise Signal Disturbance Suppressor 8T8035570

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06M911021

Audi S4 B9 S5 F5 Starter Motor Engine Actuator Bosch TFSI Petrol 06M911021

€37.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 8P4971035A-1

Audi A3 8P Door Wiring Harness Loom Electrical Cable Driver Side O/S 8P4971035A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4L1937503

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8Y0945307A-1

Audi A3 8Y Rear Taillight Lamp Wiring Harness Loom Cable Left N/S 8Y0945308A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K5971693BA

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

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G8971036K

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

€47.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 83F971104F

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

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0971035S

Audi Rs Q3 8U Front Door Wiring Harness Loom Wire Driver's Side 8U0971035S

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0035502A

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

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P0907357H

Audi A3 A4 Q7 Headlight Range Control ECU Module 8P0907357H

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

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