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 RS4 B7 Tweeter Speaker Door Front Left N/S Trim Kamut Beige 8E0035423

€23.95

Free delivery: Nov 12 – 13

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Part no. 4E0971142A

Audi A8 S8 D3 Door Window Lifter Wiring Cable Rear Left Right N/O/S 4E0971142A

€23.95

Free delivery: Nov 12 – 13

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Part no. 4G8971030CS

Audi A7 4G Front Door Wiring Loom Harness Passenger Side 4G8971030CS

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0971227A

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

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4H0951253

Audi A3 8P Multi Use Control Module Relay 4 Pin Light Green Unit 4H0951253

€23.95

Free delivery: Nov 12 – 13

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Part no. 4F0907280E

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

€23.95

Free delivery: Nov 12 – 13

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Part no. 8W0054635A

Audi A3 8V PDC Parking Sensor Control Unit Module Vodafone Automotive 8W0054635A

€56.95

Free delivery: Nov 12 – 13

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Part no. 83A971104S

Audi Q3 F3 Rear PDC Parking Sensors Wiring Loom Harness 83A971104S

€70.95

Free delivery: Nov 12 – 13

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Part no. 4K5971687BG

Audi A6 C8 Door Wiring Wire Cable Harness Loom Rear Left Right N/O/S 4K5971687BG

€61.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P0907115H-1

Audi S3 8P Engine Control Module ECU Manual 2.0 TFSI Petrol 265HP 8P0907115H Kit

€218.95

Free delivery: Nov 12 – 13

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Part no. 80A907777N

Audi Q5 FY Active Suspension Module Damping Chassis Control Unit EFP 80A907777N

€284.95

Free delivery: Nov 12 – 13

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Part no. 8V0863051

Audi A3 8V AMP Amplifier Under Seat Cover Trim Panel Unit 8V0863051

€23.95

Free delivery: Nov 12 – 13

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Part no. 8T0971030AE

Audi S5 8T Door Wiring Wire Loom Cable Harness Front Passenger Side 8T0971030AE

€51.95

Free delivery: Nov 12 – 13

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Part no. 8K0915181B

Audi A4 B8 A5 8T A6 C6 Battery Negative Terminal Cable Wiring Wire 8K0915181B

€23.95

Free delivery: Nov 12 – 13

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Part no. 4E0919064

Audi A8 D3 Door Interior Light Fibre Optic Controller Wiring Harness 4E0919064

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4E0910552G

Audi S8 D3 5.2 FSI 450HP BSM Quattro Engine Unit ECU 4E0910552G Automatic

€241.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0951177

Audi TT 8J Interior Roof Alarm Motion Ultrasonic Sensor 8J0951177

€23.95

Free delivery: Nov 12 – 13

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Part no. 8E0941004AK-2

Audi A4 B7 Headlight Wiring Harness Cable Plug Right O/S 8E0941004AK

€23.95

Free delivery: Nov 12 – 13

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Part no. 06J971082D

Audi Q3 8U Engine Injector Module Wiring Harness Cable 2.0 TFSI 06J971082E

€28.95

Free delivery: Nov 12 – 13

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Part no. 4L0959795B

Audi Q7 4L Door Control Module Unit ECU Rear Left N/S 4L0959795B

€23.95

Free delivery: Nov 12 – 13

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Part no. 92002681

Audi A1 GB A3 8V 8Y Headlight Level Adjustment Motor Actuator 92002681

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8E0857925C

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

€23.95

Free delivery: Nov 12 – 13

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Part no. 8P0906131A

Audi A3 8P Engine Unit Bracket ECU Module Holder Bracket Mount 8P0906131A

€23.95

Free delivery: Nov 12 – 13

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Part no. 5Q0907530P

Audi A3 8V Gateway Control Module Unit ECU 5Q0907530P

€23.95

Free delivery: Nov 12 – 13

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Part no. 8J0907159B

Audi TT 8J Alarm Signal Body Sound Impact Control Module Unit 8J0907159B

€23.95

Free delivery: Nov 12 – 13

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Part no. 8J0971030K

Audi TT Mk2 8J Front Door Wiring Loom Harness Passenger Side 8J0971030K

€28.95

Free delivery: Nov 12 – 13

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Part no. 4F0959792P

Audi A6 C6 Front Door Lock Control Module Unit ECU Passenger Side 4F0959792P

€23.95

Free delivery: Nov 12 – 13

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Part no. 1K0937125A-1

Audi A3 8P SE Engine Bay Fuse Relay Box Power Management 1K0937125A

€23.95

Free delivery: Nov 12 – 13

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Part no. 059971341E

Audi Q7 4L 3.0 TDI V6 Diesel Engine Cable Wiring Duct Channel Cover 059971341E

€23.95

Free delivery: Nov 12 – 13

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Part no. 5Q0937132B

Skoda Superb Mk3 3V Fuse Box Lid Cover Trim Upper Panel 5Q0937132B

€23.95

Free delivery: Nov 12 – 13

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Part no. 80A971228AG

Audi Q5 MK2 FY 40TDI 2.0 Diesel Alternator Starter Wiring Loom 80A971228AG

€51.95

Free delivery: Nov 12 – 13

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Part no. 4M0959593N

Audi Q7 4M Front Door Control Module Unit ECU Driver's Side 4M0959593N

€56.95

Free delivery: Nov 12 – 13

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Part no. 4F1971693D

Audi A6 C6 Rear Door Wiring Left Right N/O/S Harness Loom Cable 4F1971693D

€23.95

Free delivery: Nov 12 – 13

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Part no. 8K0971029M

Audi A4 B8 Door Wiring Harness Loom Front Cabling 8K0971029M

€23.95

Free delivery: Nov 12 – 13

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Part no. 4G8971036H

Audi A7 4G Front Door Wiring Loom Harness Passenger Side 4G8971036H

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04E0919064

Audi A8 D3 Door Lightning Module Control Unit Front Rear 04E0919064

€23.95

Free delivery: Nov 12 – 13

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Part no. 4E0971036

Audi A8 D3 Front Door Wiring Loom Harness Cable Passenger Side N/S 4E0971036

€23.95

Free delivery: Nov 12 – 13

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Part no. 8X0919475AL

Audi A1 S1 8X PDC Parking Assistance Control Module Unit ECU 8X0919475AL

€23.95

Free delivery: Nov 12 – 13

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Part no. 4G8035225G

Audi A6 C7 Avant Antenna Amplifier Upper Right O/S 4G8035225G

€23.95

Free delivery: Nov 12 – 13

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Part no. 8K0907063AD

Audi A4 B8 Body Control Comfort Unit Module BCM Convenience Unit 8K0907063AD

€56.95

Free delivery: Nov 12 – 13

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Part no. 8E0953549T-1

Audi A4 RS4 B7 Steering Column Control Module Unit 8E0953549T

€123.95

Free delivery: Nov 12 – 13

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Part no. 8W0971534

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

€23.95

Free delivery: Nov 12 – 13

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Part no. 4G0951177

Audi A6 C7 A7 4G Alarm Movement Detector Roof Headliner 4G0951177

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F0971765

Audi A6 C6 Wing Mirror Adjustment Switch Wiring Loom Cable 4F0971765

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0971693AB

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

€23.95

Free delivery: Nov 12 – 13

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Part no. 8W0907468M

Audi A4 B9 A5 F5 Gateway Control Module Unit ECU 8W0907468M

€89.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4B0951173

Audi A3 8L A4 B5 A6 C5 Alarm Control Module Unit ECU 4B0951173

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4L2910401B-1

Audi Q7 4L 3.0 TDI CRCA Quattro Engine ECU Kit Lock + Ignition + Key 4L2910401B

€854.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0959595E

Audi A3 8V Door Control Module Unit ECU Rear Left Right N/O/S 5Q0959595E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 05E907309CA-1

Audi A3 8Y 30 TFSI 1.5 DXDE 115HP Engine Module Control ECU 05E907309CA Manual

€165.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2100499N

Audi A6 C6 Front Seat Wiring Harness Cable Loom 2100490T

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G8959795A

Audi A7 4G8 Door Control Module Electrical Unit ECU Rear Right O/S 4G8959795A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G9035225C

Audi A6 C7 Avant Antenna Amplifier Upper Left N/S 4G9035225C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 11110150000

Audi Q3 F3 Headlight LED Inner Module Unit Left N/S 11080370000

€113.95

Free delivery: Nov 12 – 13

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Part no. 8R0971035A

Audi Q5 8R Door Wiring Loom Harness Electrical Cable Driver's Side 8R0971035A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8E1910560

Audi RS4 B7 Engine Control Module ECU 4.2 Petrol 419 HP BNS 8E1910560 Manual

€569.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1S0919275-PHB

Audi A3 8P PDC Parking Distance Control Sensor Module Unit ECU Phantom Black Z9Y

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G9971095D

Audi A6 C7 Allroad Front Bumper PDC Sensor Wiring Loom Harness 4G9971095D

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5WA959436N

Audi S3 8Y Keyless Control Module Unit ECU 5WA959436N

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G5971693A

Audi S6 C7 Door Trim Panel Wiring Wire Harness Cable Rear Left N/S 4G5971693A

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0959793Q

Audi A4 B8 Door Module Control Unit ECU Front Driver's Side 8K0959793Q

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P4035223B

Audi S3 8P Audio Sound BOSE Amplifier Stereo System Module 8P4035223B

€132.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0971035C

Audi A5 S5 RS5 8T Door Wire Harness Loom Cable Wiring Driver's Side 8T0971035C

€28.95

Free delivery: Nov 12 – 13

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Part no. 4H0971160A

Audi A8 D4 Door Card Wiring Harness Loom Front Passenger Side 4H0971160A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L907309R-9

Audi A3 8V 2.0 TDI 150HP DCYA Engine Control ECU Kit 04L907309R Manual Gearbox

€142.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0971029B

Audi Q5 8R Front Door Wiring Loom Harness Cable Driver's Side 8R0971029B

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4H0907468AE

Audi A8 D4 Gateway Control Module Diagnostic Interface BUS 4H0907468AE

€89.95

Free delivery: Nov 12 – 13

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Part no. 8P0971679J

Audi A3 8P Dashboard Glove Box Wiring Hanress CD Changer Cable 8P0971679J

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L906021BH-1

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

€284.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 83A035382A

Audi RSQ3 F3 Boot Trunk Subwoofer Rear Bass Speaker 83A035382A

€75.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 07L971627F

Audi S8 D3 Wiring Harness Wire Injectors Cylinders 1-5 5.2 FSI Petrol 07L971627F

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P4971693S

Audi A3 8P Rear Door Wiring Loom Harness Left Right N/O/S 8P4971693S

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L911021G

Audi A4 B8 A5 8T A6 C7 Starter Motor Actuator Bosch Diesel Engine 03L911021G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 02M911023S

Audi TTRS 8J VW Golf Mk6 Starter Motor Engine Bosch 2.0 TDI Diesel 02M911023S

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8X0945093-2

Audi A1 8X Boot Trunk Taillight Rear Left N/S Loom Wire Harness 8X0945093D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F0907468R

AUDI Q7 4L Quattro 3.0 TDI BUS Diagnostic Gateway Interface Module 4F0907468R

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F0919887M

Audi A5 8T Navigation System Car Sat Nav Computer Head Unit 4F0919887M

€104.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8S0971228C

Audi TTS FV Starter Motor Wiring Loom Cable Harness 8S0971228C

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0915429A

Audi A4 S4 8W A5 S5 F5 Battery Positive Terminal Cover Housing Cap 8W0915429A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8H0919889A

Audi A4 B7 Convertible Aerial Antenna Amplifier Control Unit Module 8H0919889A

€28.95

Free delivery: Nov 12 – 13

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Part no. 4F0910177

Audi A6 C6 Safety Ultra Sonic Alarm Movement Detector Module Unit 4F0910177

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 130831041000

Audi A5 8T Headlight Inner LED Inner Module Unit 6NHM0000 130831041000

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06K907425B-18

Audi S3 8V 2.0 TFSI DJHA 310HP Quattro Engine ECU Kit 06K907425B BCM + Key

€284.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P0941004-2

Audi A3 8P Front Lamp Headlight Halogen Right O/S Harness Loom Wire 8P0941004BC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0035456A-1

Antenna Amplifier Audi Q5 8R A6 C6 A5 8T Mobile Phone Module Unit 8J0035456A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0959595A

Audi A3 8V Door Control Unit Rear Left Right N/O/S 5Q0959595A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4H0907705K

Audi A8L 4H Steering Angle Steering Wheel Column Control Module ECU 4H0907705K

€32.95

Free delivery: Nov 12 – 13

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Part no. 5Q0937084AQ

Audi A3 8V Body Control Comfort Unit Module BCM Unit ECU 5Q0937084AQ

€61.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L906018JJ-1

Audi A5 8T CGLC 2.0 TDI 177HP Engine ECU Kit 03L906018JJ Automatic

€237.95

Free delivery: Nov 12 – 13

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Part no. 4N0907064BB

Audi A6 C8 Comfort Convenience Control Module Body Control Unit ECU 4N0907064BB

€132.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0959592E

Audi A4 B9 Front Door Control Module Unit Passenger Side ECU 8W0959592E

€23.95

Free delivery: Nov 12 – 13

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Part no. 4F0919805

Audi A4 B8 Smart Card Reader Smart Card System TV 4F0919805

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0971036B

Audi A5 8T S5 8F S5 8T Door Wire Cable Harness Loom Front Passenger 8T0971036B

€23.95

Free delivery: Nov 12 – 13

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Part no. 8K0971035C

Audi A4 B8 Door Wiring Harness Cable Loom Front Driver's Side 8K0971035C

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8V4971036BB

Audi A3 8V Sportback Front Passenger's Door Loom Wiring Harness 8V4971036BB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L911024A

Audi A4 B9 2.0 TDI DETA Engine Starter Motor Actuator Starter 04L911024A

€37.95

Free delivery: Nov 12 – 13

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Part no. 8K9945096-2

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

€23.95

Free delivery: Nov 12 – 13

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Part no. 8K9035225A-1

Audi A4 S4 B8 Antenna Amplifier Radio Aerial AM/FM 8K9035225A

€23.95

Free delivery: Nov 12 – 13

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Part no. 8P3945095C-2

Audi A3 8P Tailgate Lamp Light Boot Lid Left N/S Harness Loom Wire 8P3945095C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

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