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 Alternator Main Cable Wiring Harness Loom 8J0971349A

€32.95

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Audi Q7 4M Impact Sensor Unit Wiring Loom Harness Connector 4M0971677B

€56.95

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Audi RS6 C7 Front Door Wiring Harness Cable Loom Right O/S 4G5971035AS

€51.95

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Audi A1 8X Fuel Pump Module Control Unit ECU 8X0907159B

€32.95

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Audi TT 8N Roadster Bose Amplifier Audio Sound AMP 8N7035223A

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Audi A4 B8 A5 8T A6 C7 A7 4G Fuse Box Relay Wiring Harness Cable Plug 4E0906230

€23.95

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Audi Q2 GA Rear Side Taillight Boot Lid Lamp Wiring Loom Left N/S 81A945069C

€23.95

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Audi A6 C6 4F Gateway Control Unit Module ECU 4F0907468B

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Audi A4 S4 B6 B7 Antenna Amplifier Right O/S 8H0035225M

€80.95

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Audi A6 C8 Audio Sound Amplifier Bang & Olufsen Stereo System Module 4N0035223C

€189.95

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Audi A6 C8 A7 Starter Wiring Harness Cable Earth Line 4K0971228R

€113.95

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Audi A8L 4H Fuse Box Relay Chamber Lower Cover Lid Housing 4H0937555

€23.95

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Audi Q5 FY Door Control Module Unit ECU Left Right N/O/S 8W1959595J

€23.95

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Audi A4 Convertible Front Door Wiring Loom Passenger Side 8H1971029AP

€28.95

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Audi TT 8J Starter Motor Engine Diesel Valeo 02M911024N

€28.95

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Audi A6 C8 Fuse Relay Box Mount Bracket Holder Mount 4K0971845

€32.95

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Audi A4 B8 A5 8T Headlight Range Control Unit Module ECU 8K5907357A

€32.95

Part no. 8E0941004AK-1

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

€23.95

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Audi A6 C6 3.0 TDI Suppression Condenser Noise Filter 4F0903291

€23.95

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Audi SQ5 FY Control Unit Module Active Sound Design 80A907159

€75.95

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Audi RS4 B7 Positive Battery Terminal Wiring Loom Lead 4.2 V8 8E1971227

€51.95

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Audi A3 8P Golf Mk6 Convenience Module ECU Bracket Mount Support 8P0907368B

€23.95

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Audi A4 A5 A6 Q5 Q7 Radio Control Head Unit Harman Becker 4F0035061D

€232.95

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Audi Q5 8R Door Module Front Left N/S Control Unit ECU Controller 8W1959592

€28.95

Part no. 1K0907530B

Volkswagen Golf Mk5 Audi A3 8P Gateway Control CAN Module Unit 1K0907530B

€23.95

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Audi Q5 FY Positive Battery Terminal Potential Distributor 80A941823A

€56.95

Part no. 8T0971035E

Audi A5 8T Coupe Front Door Wiring Loom Harness Driver's Side 8T0971035E

€23.95

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Audi A4 B7 Front Door Wiring Harness Cable Loom Driver Side 8E1971035AH

€37.95

Part no. 4D0907131

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

€23.95

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Audi A1 8X Front Headlamp Wiring Loom Harness Cable Left N/S 8XA941005A

€23.95

Part no. 8P4971036F

Audi A3 8P Front Passenger Door Wiring Left N/S Harness Loom Cable 8P4971036F

€28.95

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Audi A6 C7 Door Module Control Unit ECU Front Left N/S 4G8959793J

€23.95

Part no. 4G8971085BL

Audi A7 4G Rear Bumper Wiring Harness Cable Sensor PDC Radar 4G8971085BA

€42.95

Part no. 4H0907428B

Audi A8 D4 Rear Reversing Camera Module View Camera Control Unit ECU 4H0907428B

€256.95

Part no. 8E0057111DX

Audi A3 8P A4 B7 RS4 B7 CD Changer For MMI Multimedia Interface 8E0057111DX

€137.95

Part no. 5K0962132A-1

Audi Q3 F3 Keyless Entry Amplifier Control Module Aerial Antenna 5K0962132A

€23.95

Part no. 8F0971030BF

Audi A5 8F Cabriolet Front Door Wiring Loom Harness Passenger Side 8F0971030BF

€32.95

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

€23.95

Part no. 4K0971228N

Audi A6 C8 Starter Wiring Harness Cable 4K0971228N

€142.95

Part no. 8Y0971036E

Audi A3 8Y Front Door Card Wiring Harness Loom Cable Passenger Side 8Y0971036E

€37.95

Part no. 8E0959643B

Audi A4 B7 Crash Impact Air Sensor Unit Module 8E0959643B

€23.95

Part no. 8W6971035BP

Audi S5 F5 Front Door Wiring Harness Cable Loom Driver Side 8W6971035BP

€66.95

Part no. 4K0971349L

Audi A6 C6 Alternator Main Cable Wiring Harness Loom 4K0971349L

€85.95

Part no. 8X0907063R

Audi A1 8X Central Gateway Control Unit Module Relay Supply ECU 8X0907063R

€32.95

Part no. 4H0971687BK

Audi A8 D4 Door Wiring Loom Harness Cables Rear Right O/S 4H0971687BK

€28.95

Part no. 8T0959792K

Audi A5 S5 8T Door Module Control Unit Front Passenger Side 8T0959792K

€23.95

Part no. 8K2907551A

Audi S4 B8 S5 8T 3.0 TFSI CREC Quattro 333HP Engine ECU 8K2907551A Automatic

€417.95

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Audi A4 B9 A5 F5 A6 C8 Starter Motor 2.0 TDI CNHA Diesel 04L911024

€23.95

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Audi A4 B8 A5 8T Q5 8R A8 D4 Stereo DAB CD Player Radio Head Unit 4G0035061N

€284.95

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Audi A5 S5 F5 Headlight Module LED Headlamp Control Unit 000330028P

€94.95

Part no. 03L906018RC-1

Audi Q3 8U 2.0 TDI CFGC Quattro Engine ECU Kit 03L906018RC Ignition + Key Manual

€189.95

Part no. 1K0971615DA

Audi A3 S3 RS3 8P VW Caddy 2K Engine Wiring Loom Cable Guide Mount 1K0971615DA

€23.95

Part no. 8F0971029BF

Audi A5 8F Cabriolet Front Door Wiring Loom Harness Driver's Side 8F0971029BF

€32.95

Part no. 4H0971095AG

Audi A8 4H D4 Front Bumper PDC Parking Sensors & Wiring Loom 4H0971095AG

€94.95

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Audi A3 8V Rear Left Right N/O/S Door Card Wiring Loom Harness 8V4971693

€23.95

Part no. 04L907309A-4

Audi A3 8V 2.0 TDI 150HP Engine ECU Kit Ignition With Key Automat 04L907309A

€99.95

Part no. 07L971821

Audi A8 D3 Cable Guide Ignition Coil With Spark Plug Connector 07L971821

€23.95

Part no. 80A971693R

Audi Q5 FY Door Panel Wiring Harness Cable Rear Left Right N/O/S 80A971693R

€32.95

Part no. 8K0915429G

Audi A4 B8 A5 F5 A6 C6 A7 4G Battery Cover Lid Cap Surround 8K0915429G

€23.95

Part no. 8W0971687BR

Audi A4 B9 Rear Right O/S Door Wiring Loom Harness 8W0971687BR

€56.95

Part no. 5WA919275B-KYG

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

€23.95

Part no. 4E0907383H-1

Audi Q7 4L Towbar Trailer Hitch Control Module Unit ECU HELLA 5DS010154-11

€66.95

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Audi RS4 B8 Positive Battery Distribution Terminal Junction Relay Box 8K0937517B

€23.95

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Audi A8 S8 D3 Door Speaker Mid Range Rear Left Right N/O/S 4E0035411D

€23.95

Part no. 8K0959663C

Audi A8L 4H Voltage Converter Stabilizer Control Module Unit ECU 8K0959663C

€23.95

Part no. 4G0907566J

Audi A7 4G Sportback Lane Change Assist Control Module Rear Left N/S 4G0907566J

€108.95

Part no. 4H0907101H

Audi A8 D4 Fuse Box Relay Mounting Board Holder 4H0907101H

€23.95

Part no. 8W0035454

Audi A4 B9 Front Centre Dashboard Tweeter Speaker 8W0035454

€23.95

Part no. 82A945092C-2

Audi A1 GB Sportback Rear Tail Light Wiring Cable Outer Right O/S 82A945092C

€23.95

Part no. 8X0971029D

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

€23.95

Part no. 8W0959655AD

Audi A5 F5 Air Module Control Unit ECU 8W0959655AD

€113.95

Part no. 5WA919275C-DGR

Audi S3 8Y PDC Parking Distance Sensor Daytona Grey Metallic - Z7S 5WA919275C

€23.95

Part no. 8J0907361

Audi TT 8J Central Electric System Fuse Box Housing Bracket Retainer 8J0907361

€23.95

Part no. 059907309L-1

Audi A6 C8 A7 4K 3.0TDI Quattro CCVB 286HP Engine ECU Kit 059907309L Automatic

€408.95

Part no. 8E0971085A

Audi A4 B7 Rear Bumper PDC Parking Sensor Wiring Harness Loom 8E0971085A

€23.95

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Audi A3 8V Q3 F3 VW Golf M7 Antenna Control Module Keyless Entry Line 5Q0962131

€23.95

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Audi A1 S1 8X A6 C8 Rear Upper Brake Light Wiring Harness Wiring Loom 8X0971170

€23.95

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Audi A4 B8 Chip Card Reader for Road Toll ETC Japan Module Unit 4F0919813E

€37.95

Part no. 8K2907115AF

Audi A5 8T 2.0 TFSI CDNB 180HP Engine Control Unit ECU 8K2907115AF Manual

€94.95

Part no. 8E0907307C

Audi RS4 B7 4.2 Servotronic Relay Control Unit 8E0907307C

€70.95

Part no. 4F1971036A

Audi A6 C6 Front Passenger Door Wiring Left N/S Harness Loom Cable 4F1971036A

€23.95

Part no. 8E0910115Q-1

Audi A4 B7 2.0 TFSI BWE 200HP Engine Control Unit ECU 8E0910115Q Automatic

€66.95

Part no. 8T0862335F

Audi A4 B8 Bluetooth Multimedia Interface Control Module Unit ECU 8T0862335B

€23.95

Part no. 8P0035225B

Audi A3 8P Aerial Amplifier Booster Bootlid Antenna Module Unit 8P0035225B

€23.95

Part no. 4G0907589F

Audi A7 4G 3.0TDI CVUA 320HP Quattro Engine Control ECU Kit 4G0907589F Automatic

€650.95

Part no. 0AM911023R

Audi A3 8V 1.4 TSI Petrol Starter Motor Engine Actuator Unit 0AM911023R

€28.95

Part no. 2Q0980653C

Audi Q2 GA RSQ3 F3 Front Camera Module Lane Assist Control Unit 2Q0980653C

€56.95

Part no. 079903805J

Audi A4 B6 B7 4.2 V8 FSI Alternator Bracket Mount Holder 079903805J

€23.95

Part no. 8XA971085A

Audi A1 S1 8X Rear Bumper Parking Sensor Wiring Loom Harness Cable 8XA971085A

€89.95

Part no. 8V4971036AG

Audi A3 8V Front Door Wiring Loom Harness Passenger Side N/S 8V4971036AG

€23.95

Part no. 03L903023L

Audi A3 8V Diesel Engine Starter Alternator Electrical 14V 140A 03L903023L

€47.95

Part no. 5Q0959392E

Audi A3 8V Front Door Module Unit ECU Left N/S Passenger Side 5Q0959392E

€23.95

Part no. 8T0971365H

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

€23.95

Part no. 4G5035225

Audi A6 C7 Aerial Roof Booster Antenna Amplifier AMP 4G5035225

€23.95

Part no. 8V5945096A-2

Audi A3 8V Saloon Rear Tail Light Wiring Harness Cable LED Right O/S 8V5945096A

€23.95

Part no. 191906383C

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 191906383C

€23.95

Part no. 04L907282

VW Volkswagen Audi Seat Skoda Glow Plug Relay Unit Black 511 9 Pins 04L907282

€23.95

Part no. 06L971627T

Audi A4 B9 2.0 CVKB Petrol Fuel Injectors Wiring Harness Loom 06L971627K

€23.95

Part no. 4K0971238

Audi A6 C8 Alternator Earth Line Ground Wiring Harness Cable 4K0971238

€32.95

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