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 A6 C8 Battery Clamping Strip Holder Support Carrier Mount 4K0803123B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0915181E

Audi A3 8V Negative Battery Terminal Cable Harness Wiring Loom 5Q0915181E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0971030B

Audi Q5 8R Front Door Wiring Loom Harness Cable Passenger Side 8R0971030B

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 81A971687J

Audi Q2 GA Rear Door Wiring Loom Harness Left Right N/O/S 81A971687J

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5LA907357H

Audi A6 C6 Front Lamp Headlight Range Control Module Unit ECU 5LA907357H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0907364

Audi S4 B8 Quattro Dynamic Suspension Electric Damper Control Module 8K0907364

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079971821

Audi S5 8T 4.2 FSI Ignition Coils Wiring Cable Guide Duct Cyl.5-8 079971822

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971030AE

Audi A4 B8 Front Door Wiring Loom Cable Harness Left N/S 8K0971030AE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0971767

Audi Q7 4L Washer Bottle Reservoir Wiring Loom Harness 4L0971767

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06M907309G-2

Audi A6 C8 3.0 TFSI Quattro 340HP DLZA Engine Unit ECU Kit 06M907309G Automatic

€854.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3Q0941329

Volkswagen Skoda Seat Audi Diesel Engine Adblue Module Control Unit 3Q0941329

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0971036A

Audi Q5 8R Door Wiring Loom Harness Cable Front Passenger Side 8R0971036A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079971822

Audi S5 8T 4.2 FSI Ignition Coils Wiring Cable Guide Duct Cyl.1-4 079971822

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0907160A

Audi A4 B9 A5 F5 Engine Sound Noise Production Control Unit 8W0907160A

€146.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079971627Q

Audi RS4 B8 RS5 8T Fuel Injector Wiring Loom Harness 4.2 V8 079971627Q

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079911021G

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

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F0959795M

Audi A6 C6 Rear Door Left Right N/O/S Module Unit Control ECU 4F0959795M

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0915181H

Audi A1 8X Negative Minus Battery Terminal Cable 1.4 TFSI CAXA Petrol 8K0915181H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5G0907324

Audi RSQ3 F3 VW Golf MK7 Active Suspension Module Mount Bracket Holder 5G0907324

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G1035053G

Audi Q7 4l Radio Satelite Navigation System Control Head Unit ECU 4G1035053G

€360.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L903017A-1

Audi A4 B8 3.0 TDI CAPA Diesel Alternator 04L903017A

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 80A915459-1

Audi Q5 FY Battery Positive Cable Clamp Control Module Terminal 80A915459

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0906121B

Audi A4 B9 A5 F5 2.0 TDI Engine Fuel Pump Control Unit Module 8W0906121B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06D911021B

Audi A4 B8 A5 8T Engine Starter Motor Actuator Unit Petrol 06D911021B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L907445E

Audi Q2 GA 1.6 TDI DDYA 115HP Engine Module Unit ECU Kit 04L907445E Manual

€332.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4M0906093L

Audi Q7 4M 3.0 TDI Fuel Pump Control Unit Module ECU 4M0906093L

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8X0971693

Audi A1 8X Door Wiring Harness Loom Rear Left Right N/O/S Cabling 8X0971693

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8Y0035042C

Audi S3 8Y Body Control Comfort Module ECU Unit Bluetooth 8Y0035042C

€1,139.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 431951253D

Audi TT 8N Relay Unit Module 431951253D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04E907309AC-2

Audi A1 8X 1.4 TFSI CZCA 125HP Engine Control ECU Kit 04E907309AC Manual

€180.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0959107AC

Audi A8 4D Tailgate Lift Boot Lid Control Unit Module Trunk 4H0959107AC

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W8971035AD

Audi A5 S5 F5 Door Trim Panel Harness Wiring Wire Front Driver Side 8W8971035AD

€80.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0906093C

Audi Q7 4L A8 D4 Fuel Pump Control Unit Module ECU Diesel 4H0906093C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F0937503

Audi A6 C6 R8 42 Dashboard Fuse Box Electrical Relay Unit 4F0937503

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906018AJ-2

Audi A3 8P 2.0 TDI 170HP CFGB Engine Control Unit ECU 03L906018AJ Manual

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E0035456C

Audi A4 B7 Telephone Aerial Antenna Signal Amplifier Module 8E0035456C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04E907309AC-1

Audi A1 8X 1.4 TFSI CZCA 125HP Engine ECU Kit BCM Lock + Key 04E907309AC Manual

€161.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0971030CH

Audi A4 B9 Front Door Wiring Loom Harness Passenger Side 8W0971030CH

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K2971615A

Audi A3 8P Engine Bay Wiring Holder Harness Loom Cable Guide Bracket 1K2971615A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L0971225

Audi Q7 4L 4.2 TDI Quattro Positive HV Battery Terminal Cable Harness 7L0971225

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0951223

Audi A6 C7 Single Horn Alarm Siren High Tone Control Unit Module 4H0951223

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06M907309D-4

Audi S5 F5 3.0 TFSI 354HP CWGD Quattro Engine ECU Kit BCM + 2 Key 06M907309D

€455.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K5971687BA

Audi A6 C8 Door Wiring Cable Harness Loom Rear Left Right N/O/S 4K5971687BA

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0035223F

Audi A4 B8 A5 8T Stereo Radio Sound System Speaker Amp Amplifier 8R0035223F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971687B

Audi A4 B8 Door Harness Loom Cable Wiring Rear Left Right N/O/S 8K0971687B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0907064FH

Audi A6 C7 BCM2 Comfort Body Control Module Electrical Unit ECU 4H0907064FH

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0971035R

Audi A4 B9 Front Door Wiring Harness Cable Loom Driver Side 8W0971035R

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079971627R

Audi RS4 B8 RS5 8T Injector Wiring Loom Harness 4.2 V8 FSI Petrol 079971627R

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A971392

Audi Q3 RSQ3 F3 Seat Belt Warning Wiring Harness Centre Left N/S 83A971392

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0971534A

Audi A4 B9 A5 F5 Earth Minus Negative - Battery Wire Cable Lid 8W0971534A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0035652B

Audi Q7 4L MMI Multimedia Radio CD Player Sat Nav Head Unit 4L0035652B

€227.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6C0937132C

Audi A1 S1 8X Fuse Box Relay Top Upper Cover Cap Flap 6C0937132C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L907309E-3

Audi A3 8V 1.6 TDI CRKB 110HP Engine Control ECU Kit 04L907309E Manual

€165.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K5971693AS

Audi A6 C8 Door Card Trim Wiring Harness Loom Rear Left Right N/O/S 4K5971693AS

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0907063CC

Audi A4 B9 BCM Body Control Module Comfort Unit ECU 8W0907063CC

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 431951253G

Audi S8 A8 D3 Relay Control Module Unit Purple 381 4 Pins 431951253G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4M0959655AL

Audi A6 C8 Q7 4M Air Module Control Unit ECU 4M0959655AL

€313.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0919614B

Audi Q7 4L Navigation Multimedia Control Panel Knob Unit 4L0919614B

€550.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0971085D

Audi TT 8J Parking Sensor Wiring Harness Cable PDC Rear Bumper 8J0971085D

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T8945095D-2

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0907064GB

Audi A4 B9 A5 F5 Central Body Control Module BCM Unit ECU 8W0907064GB

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0959793P

Audi A4 B8 A5 8T Door Control Unit Module Front Driver's Side 8T0959793P

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0971036D

Audi A4 B9 Front Door Wiring Harness Cable Loom Passenger Side 8W0971036D

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 079903805AD

Audi RS4 RS5 B8 Alternator Mounting Bracket Support 4.2 FSI CFSA 079903805AD

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F0971679C

Audi A6 C6 Glove Box Storage Compartment Wiring Loom Harness Cable 4F0971679C

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0915181K

VW Volkswagen Caddy 2K Negative Cable Battery Terminal Wiring Loom 1K0915181K

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 420971235

Audi R8 42 Battery Minus Negative Wiring Loom Harness Cable 420971235

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V0907451

Audi A3 8V Sun Light Solar Sensor Control Detector 8V0907451

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4N0907063NG

Audi A6 C7 Body Control Comfort Unit Module BCM Convenience Unit ECU 4N0907063NG

€232.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 05L907309-1

Audi A5 F5 2.0 TDI DEZE 163HP Engine ECU Kit BCM2 + Key 05L907309 Automatic

€474.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0937503B

Audi A4 B9 A5 F5 A6 C8 Fuse Relay Box Power Distribution 8W0937503B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0971029CH

Audi A4 B9 Front Door Wiring Loom Harness Cable Loom Right O/S 8W0971029CH

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L903023K

Audi A3 8V A4 A5 B8 Alternator Generator Electrical Unit Diesel 03L903023K

€61.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906018JR-1

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

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0907334

Audi A6 C8 A7 C8 Fuse Box Power Distribution Unit Module Control 4K0907334

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971687AG

Audi A4 B8 Door Harness Loom Cable Wire Rear Left N/S 8K0971687AG

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V4971036M

Audi A3 8V Door Trim Harness Wiring Wire Front Passenger Side 8V4971036M

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906018JM-2

Audi Q5 8R 2.0 TDI CGLC Quattro 177HP Engine ECU Kit Lock Key 03L906018JM Manual

€208.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 05L907309-3

Audi A4 B9 A5 F5 2.0 TDI DEZB 136HP Engine Control ECU 05L907309 Automatic

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0971384K

Audi Q7 4L Seat Frame Wiring Harness Loom Wire Front Right O/S 4L0971384K

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971030AD

Audi A4 B8 Door Wiring Harness Cable Loom Front Passenger Side 8K0971030AD

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0959792E

Audi A4 B8 A5 8T Front Door Module Control Unit Module ECU Left N/S 8K0959792E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06K907425B-15

Audi S3 8V 2.0 TFSI DJHA 310HP Quattro Engine Unit ECU Kit 06K907425B Automatic

€360.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0907468AB

Audi A4 B8 2.0 TDI CAGA Gateway Interface Control Module Unit ECU 8T0907468H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0959793F

Door Module Audi A5 8T A4 B8 Control Front Right O/S Unit 8T0959793F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0959595N

Audi A4 B9 Door Module Rear Right Left N/O/S Control Unit 8W0959595N

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0971663A

Audi A8 D4 Front Door Wiring Harness Loom Cable Left N/S 4H0971663A

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0906093F

A4 B9 35 TFSI Fuel Pump Sender Control Relay Module Unit ECU 8W0906093F

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K5971693AJ

Audi A6 C8 Door Wiring Harness Loom Rear Left Right N/O/S 4K5971693AJ

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4E0035061D

Audi A8 D3 Radio Audio Sound Amplifier Tuner Harman Becker 4E0035061D

€189.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L2910401B

Audi Q7 4L Engine ECU Control Unit 239 HP 3.0 TDI CASA 4L2910401B Automatic

€408.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0937124A

Audi A4 B9 A5 F5 Q5 FY Fuse Box Control Module Relay Box 8W0937124A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G5971693

Audi A6 C7 4G Rear Door Card Harness Loom Cable Wiring Left N/S 4G5971693

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 059911021D

Audi A5 8T Starter Motor 3.0 TDI CCWA Diesel 059911021D

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971687AC

Audi A4 B8 Door Wiring Harness Cable Loom Rear Left N/S 8K0971687AC

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06H911021A

Audi A5 8T 2.0 TFSI Petrol Engine Starter Motor Actuator 06H911021A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0971226

Audi TT 8J Negative Battery Cable Lead 8J0971226

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0959793

Audi A5 8T Door Module Control Unit ECU Front Driver's Side 8K0959793

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2Q0959659

Audi A1 GB VW Polo AE Taigo CS Taigun CW Front Impact Crash Sensor 2Q0959659

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

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