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 C7 3.0 TFSI Quattro 310HP Engine Control ECU Kit 4G0907551E Automatic

€332.95

Free delivery: Nov 12 – 13

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Part no. 8X0971029S

Audi A1 8X Door Loom Wiring Harness Cable Front Driver Side 8X0971029Q

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4M1959595K

Audi A6 C8 A7 4K Door Module Rear Left Right N/O/S Control Unit ECU 4M1959595K

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0907347A

Audi A6 C8 Mild Hybrid Power Distribution Mount Bracket Support 4K0907347A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0907468A

Audi A1 8X Gateway Control Module Unit ECU 1.2 TFSI CBZA Petrol 8U0907468A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L906021CA-1

Audi A4 B8 2.0 TDI CSUA 150HP Engine Control Unit ECU KIT 04L906021CA Automatic

€170.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0915181A

Audi RSQ3 8U Negative Minus - Battery Wiring Cable Loom 2.5 TFSI 8U0915181A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8V0907376C

Audi A3 S3 8V Air Suspension Damping Module Control Unit 8V0907376C

€94.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4M1959792J

Audi A6 C8 Q5 FY Door Control Unit Module ECU Passenger Side 4M1959792J

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8H0951177-1

Audi A4 B6 B7 Cabriolet Alarm Rear Movement Detector Control Unit 8H0951177

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0971029

Audi Q3 8U Front Door Wiring Harness Wire Loom Cable Left N/S 8U0971029

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W6945092N

Audi A5 F5 LED Rear Outer Tail Light Taillight Lamp Right O/S 8W6945092N

€142.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03C906016T

Audi A3 8P 1.4 TFSI CAXC 125HP Engine Control Unit ECU Kit 03C906016T Automatic

€284.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0971250Q

Audi A3 S3 8V Negative Battery Terminal Earth Cable Lead Wiring 5Q0971250Q

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4H0971030HG

Audi A8 S8 D4 4H Front Door Wiring Loom Harness Passenger's Side 4H0971030HG

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K2907115AF-1

Audi A5 8T Engine Module ECU Kit 2.0 TFSI 180HP Key Lock Manual 8K2907115AF

€142.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 02E911023Q

Audi A3 8P Engine Starter Motor Actuator 2.0 TDI Diesel 02E911023Q

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0907064F-1

Audi S4 B8 Central Convenience Module Comfort Control ECU 8K0907064GF

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3Q0959435Q

Volkswagen Audi Skoda Seat Keyless Entry Module ECU Unit 3Q0959435Q

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4E0910336J

Audi A5 8T Bluetooth Telephone Control Module Unit ECU 4E0910336J

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T8971688J

Audi A5 S5 8T Door Wiring Loom Harness Wire Cable Rear Right O/S 8T8971688J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F1971035C

Audi A6 C6 Front Door Wiring Harness Loom Cable Right O/S 4F1971035C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3Q0907338P

Audi Q2 GA Headlight Light Headlamp Lamp Control Module Unit ECU 3Q0907338P

€104.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P0915181B

Audi A1 8X Negative Battery Terminal Cable Wiring 7P0915181B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W5945094AA-1

Audi A4 B9 S4 8W Rear Tail Light LED Right O/S Wire Cable Harness 8W5945094AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1S0919275D-TOG

Audi Q3 8U PDC Parking Distance Control Sensor Tornado Grey-X7P 1S0919275D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8X0971693A

Audi A1 8X Door Wiring Harness Loom Rear Left Right N/O/S Cabling 8X0971693A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W6945093AA-1

Audi A5 F5 Rear Tail Light Matrix LED Lamp Wiring Inner Left N/S 8W6945093AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0959792C

Audi A4 B8 Door Module Control Unit ECU Front Left N/S 8K0959792C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0035225J

Audi A5 8T Antenna Aerial Amplifier Module Control Unit 8T0035225J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0971035J

Audi TT 8J Driver's Side Door Card Wiring Loom Harness Cable 8J0971035H

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T8971687J

Audi A5 S5 8T Door Wiring Loom Harness Wire Cable Rear Left N/S 8T8971687J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T8971030AM

Audi A5 8T Front Door Wiring Harness Loom Cable Passenger's Side 8T8971030AM

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0971226

Audi A6 C8 Positive Plus + Wiring Loom Cable Lead 4K0971226

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8E2971235

Audi A4 B7 Seat Exeo 3R Battery Negative Terminal Cable 8E2971235

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T8035225D

Audi A5 8T Audio Radio Aerial Amplifier Control Unit 8T8035225D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0971499

Audi Q3 F3 VW Golf Mk7 Automatic Gearbox Wiring Loom Harness Cable 5Q0971499

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0971349BF

Audi TT Mk2 8J Alternator Charging Wire Cable 1.8 2.0 TFSI Petrol 8J0971349BF

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0971250AL

Audi A3 8P Negative Battery Terminal Cable Wiring Battery Wire 1K0971250AL

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8Z0951253-1

Skoda Octavia Mk2 5 Pin Black Relay Control Module Unit Set Kit 8Z0951253

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0012615G

Volkswagen Skoda Seat Audi Tyre Inflation Air Pump Compressor 5N0012615G

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4N0035751

Audi A6 C8 Engine Sound Control Unit Module 4N0035751

€189.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0959795J

Audi A5 8T Rear Door Module Control Unit Module ECU Left Right N/O/S 8T0959795J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4L0035223G

Audi Q7 4L Bose Sound System Audio Amplifier Amp Bose 4L0035223G

€379.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8V0035736

Audi A3 8V Music Interface Multimedia Connection Module 8V0035736

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 02M911024P-1

Audi A1 8X A3 8P Q3 Mk1 Diesel Engine Starter Motor 02M911024P

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0915181

Audi Q5 8R Negative Battery Terminal Cable Wiring Battery 8R0915181

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0907064CH

Audi A5 F5 BCM Body Comfort Onboard Control Module Unit ECU 8W0907064CA

€61.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 022906032KT

Audi TT 8J 3.2 FSI BUB Quattro 250HP Engine Control Unit ECU 022906032KT Manual

€398.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0971348

Audi A4 B9 Gearbox Cable Wiring Loom Harness Manual Front Wheel Drive 8W0971348

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0035195G

Audi TT 8J Radio Head Unit CD Audio Player Control Unit 8J0035195G

€75.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L906019AS-1

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. 03L906022RM-2

Audi A4 B8 A5 8T 2.0 TDI Quattro CAHA 170HP Engine ECU Kit 03L906022RM Manual

€189.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0907361B

Audi A3 Q3 8U Relay Plate Fuse Box Bracket Holder Housing Retainer 1K0907361B

€23.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 4F2910115F-1

Audi A6 C6 2.0 TFSI BPJ 170HP Engine ECU Kit 4F2910115B Ignition + Key Manual

€189.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8E0941029BC-2

Audi RS4 B7 Headlight Lamp Light Left N/S Harness Wire Loom 8E0941029BC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G0035192H

Audi A6 C7 Multimedia Radio CD Player Head Unit 4G0035192H

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8S0971029D

Audi TT FV TTS 8S Front Door Wiring Loom Cable Harness Driver Side 8S0971029D

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0971029E

Audi A4 B8 Door Wiring Harness Loom Cable Front Driver's Side 8K0971029E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4L0971104S

Audi Q7 4L Rear Bumper Wiring Loom PDC Harness Parking Sensor 4L0971104

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0907115Q

Audi TTS 8J 2.0 TFSI CDLB 272HP Quattro Engine Control ECU 8J0907115Q Automatic

€108.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T8971029K

Audi A5 S5 8T Door Wiring Loom Harness Cable Wire Front Right O/S 8T8971029K

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 83A945093D-2

Audi Q3 F3 Rear Tail Light Lamp LED Wiring Harness Cable Left N/S 83A945093D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3B0972722

Audi A1 8X A3 S3 RS3 8P 8V A6 S6 C7 Lumbar Support Harness Loom Wire 3B0972722

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K9035382B-1

Audi RS4 B8 Boot Trunk Speaker Spare Wheel Holder Audio Kicker 8K9035382B

€80.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 8E0035195M-1

Audi A4 B7 Symphony CD Changer Radio Head Unit 8E0035195M

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8X0971035AS

Audi A1 8X Door Loom Wiring Harness Cable Front Right O/S 8X0971035AS

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8S0971036H

Audi TT FV Door Wiring Harness Loom Bang Olufsen Front Passenger Side 8S0971036H

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06H903018J-1

Audi A4 B8 A5 8T Q5 8R Alternator Generator Motor Petrol 06H903018J

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W8959107E

Audi A5 F5 Rear Hatch Tailgate Boot Lid Control Module Unit ECU 8W8959107E

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4M4915233AE

Audi A6 C8 Boot Battery Monitoring Control Module Unit 4M4915233AE

€142.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0906093G

Audi A1 8X VW Seat Skoda Fuel Pump Control Unit Module 1K0906093G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0907574B

Audi A4 A5 Q5 Yaw Rate Acceleration Sensor Module 8R0907574B

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5E5945112-2

Skoda Octavia Mk3 5E Rear Tail Light Lamp Wiring Cable Right O/S 5E5945112

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8V4945075-1

Audi A3 8V Sportback Rear Lamp Taillight Inner Left N/S Harness Loom 8V4945075

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4L0971687L

Audi Q7 4L Rear Door Wiring Loom Harness Cable Left Right N/O/S 4L0971687L

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G9959107C

Audi A6 C7 Tailgate Boot Trunk Rear Lid Control Module ECU Unit 4G9959107C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P0959655N

Audi A3 8P Side Air Module Control Unit ECU 8P0959655N

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0907297A

Audi S5 8T Parking Aid PDC ECU Control Unit Bracket Holder Retainer 8K0907297A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0915459F-1

Audi A6 C8 Power Disctribution Control Module 4K0915459F

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0919603

Audi Q3 8U Multimedia MMI Head-Up Display Screen 6" RMC Sat Nav 8U0919603

€123.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03G906056S-2

Audi A3 8P 1.9 TDI BLS 105HP Engine Control Unit ECU Kit 03G906056S Manual

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03G906016BF

Audi A6 C6 Engine Control Unit ECU 2.0 TDI 140HP BLB Diesel Manual 03G906016BF

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03F906070FE

Audi A3 8P 1.2 TFSI CBZB 105HP Engine Control Unit ECU Kit Lock Key 03F906070FE

€189.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4M0971227CB

Audi Q7 4M 3.0 TDI Battery Earth Cable Lead Negative Wiring 4M0971227CB

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4M1959592K

Audi A6 C8 A7 4K Door Module Control Unit ECU Front Passenger Side 4M1959592K

€61.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K1907115A-1

Audi A4 B8 1.8 TFSI CABB 160HP Engine Control Module Unit ECU 8K1907115A Manual

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0907361C

Audi A3 8V Fuse Box Control Module Relay Box 5Q0907361C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3Q0959435F

Audi A3 S3 RS3 8V Entry Keyless Kessy Control Module Unit ECU 3Q0959435F

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8S0947355

Audi TT FY 8S LED Module Light Unit Wiring Harness 8S0947355

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6R0971349BP

Audi A1 8X Alternator Wiring Cable Loom Harness 1.6 TDI Diesel 6R0971349BP

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8D0972695

Audi R8 42 Diagnostic Plug Connector Wiring Loom Cable Harness 8D0972695

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0971104AC

Audi RS4 A4 B8 8K Parking Sensors Rear Bumper Wiring Loom 8K0971104AC

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059903143BH

Audi A6 C8 Q7 4M A8 D5 Alternator Bracket Mount Holder Support 059903143BH

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P0907279A

Audi A3 8P Body Control Comfort Module BCM Unit ECU 2.0 FSI Petrol 8P0907279A

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8X0971030M

Audi A1 S1 8X 3D Door Wiring Harness Loom Cable Passenger Side 8X0971030J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 83A945091-2

Audi Q3 F3 Outer Rear Tail Light Plug Wire Cable Connector Left N/S 83A945091

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0915321J

Audi Q2 Seat Leon VW Golf Battery Tray Holder Mounting Bracket 5Q0915321J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G1035021E

Audi A7 4G Radio Navigation CD Player Control Head Unit 4G1035021E

€1,329.95

Free delivery: Nov 12 – 13

If paid before 14:00

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