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

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0907347A

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906022MA-1

Audi A3 8P Engine Control Module ECU 2.0 TDI CBAB 140HP Kit 03L906022MA

€237.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 5QA919294L

Audi Q2 GA Park Parking Assist PDC Distance Control Unit Module 5QA919294L

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V0907376C

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

€94.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 8V0906259F

Audi S3 8V 2.0 TFSI CJXC 300HP Quattro Engine Control ECU 8V0906259F Automatic

€170.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 6R0915181E

Audi A1 8X Battery Cable Loom Harness Wiring Negative Terminal 6R0915181E

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 5Q0971250Q

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

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 4E0910336J

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

€113.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 3Q0907338P

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

€104.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7P0915181B

Audi A1 8X Negative Battery Terminal Cable Wiring 7P0915181B

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 8T0035225J

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0971035J

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

€56.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 8T8971030AM

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

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K0971226

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T8035225D

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

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 1K0971250AL

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4N0035751

Audi A6 C8 Engine Sound Control Unit Module 4N0035751

€189.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 4L0035223G

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

€379.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V0035736

Audi A3 8V Music Interface Multimedia Connection Module 8V0035736

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0915181

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0907064CH

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

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G5945096C-2

Audi A6 C7 Rear Outer Taillight Lamp LED Wiring Harness Right O/S 4G5945096C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0971095CA

Audi Q7 Front Bumper Wiring Loom Harness 4L0971095CA

€70.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 8K0971030E

Audi A4 B8 Front Door Wiring Harness Loom Cabling Passenger Side 8K0971030E

€28.95

Free delivery: Aug 10 – 11

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: Aug 7 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 4L0971104S

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

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0959655BD

Audi A3 8V Air Module Control Sensor SRS System ECU Unit 5Q0959655BD

€156.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 4M4915233AE

Audi A6 C8 Boot Battery Monitoring Control Module Unit 4M4915233AE

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0906093G

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

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8P0959655N

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

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 4K0915459F-1

Audi A6 C8 Power Disctribution Control Module 4K0915459F

€51.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 8K0907279D

Audi A5 8T Gateway Convenience Body Module Control Unit ECU 8K0907279D

€32.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 5Q0907361C

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

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 8S0947355

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

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8D0972695

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

€23.95

Free delivery: Aug 10 – 11

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: Aug 10 – 11

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: Aug 10 – 11

If paid before 14:00

Part no. 4G1035021E

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

€1,329.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A945094D-1

Audi Q3 RSQ3 F3 Rear Tail Light Lamp LED Right O/S Harness Wire Loom 83A945094D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8E5035223E

Audi A4 Avant B7 Bose Stereo Radio Sound System Amplifier Module 8E5035223E

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0959593B-1

VW Golf 5G Audi S3 A3 8V Door Module Control Unit Front Driver Side 5Q0959593B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L903017D

Audi A4 B8 A5 8F 2.0 TDI Diesel Engine Alternator Generator 04L903017D

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0971035AH

Audi Q7 4L Door Card Wiring Loom Harness Cable Front Left N/S 4L0971035AH

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0971693B

Audi Q5 8R Rear Door Card Wiring Loom Left Right N/O/S 8R0971693

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0959754H

Audi A5 8T Remote Button Smart Key Fob Unit 8K0959754H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0971036K

Audi Q7 4L Door Wiring Loom Harness Wire Cable Front Right O/S 4L0971036K

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0945096H-2

Audi A8 D4 Rear LED Light Lamp Taillight Right O/S Harness Loom Wire 4H0945096H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K5971030D

Audi A6 C8 Door Card Wiring Loom Harness Cable Front Passenger Side 4K5971030D

€61.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906022RC-1

Audi TT 8J 2.0TDI 170HP CBBB Quattro Engine ECU Kit BCM Key 03L906022RC Manual

€170.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G8971365

Audi A7 4G Seat Cable Front Left Right N/O/S Wiring Loom Harness 4G8971365

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906018JG-2

Audi A5 8F Engine Control Unit ECU 2.0 TDI CGLC 177HP Manual 03L906018JG

€127.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F1971845A

Audi R8 42 Fuse Box Electrical Connector Relay Control Unit Module 4F1971845A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4K8971036F

Audi A6 C8 Door Card Wiring Loom Harness Cable Front Passenger Side 4K8971036F

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A945092-2

Audi Q3 F3 LED Tail Light Rear Right O/S Plug Wire Cable Connector 83A945092

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0419065D

Audi A4 B9 A5 F5 Power Steering Column Control Unit Module 8W0419065D

€47.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 03L906022FL-1

Audi A6 C6 2.0 TDI 233HP CAGB Engine Control ECU Kit 03L906022FL Key + Lock

€180.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971765F

Audi A4 B8 A5 8T AdBlue Additive Fuel Tank Wiring Loom 2.0 TDI 8K0971765F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L903023

Audi A3 8V Diesel Engine Starter Alternator Electrical 14V 140A 03L903023

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T2035110A

Audi A5 8T Radio Head Unit Navi CD DVD Player Changer 8T2035110A

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0971365H

Audi A8 D4 Seat Wiring Harness Cable Seat Belt Warning System 4H0971365H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F9035225AA

Audi A6 C6 Antenna Amplifier Control Unit Module 4F9035225AA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0035225N

Audi A8L 4H Antenna Aerial Amplifier 4H0035225N

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0971366M

Audi A8 D4 Seat Frame Wiring Harness Front Left N/S 4H0971366M

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3C0919275S-BLK1

Audi TT 8J PDC Parking Assist Distance Sensor Control 3C0919275S Black

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0959595G

Audi A4 B9 Rear Door Control Module Unit ECU Left Right N/O/S 8W0959595G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T8971687S

Audi A5 S5 8T Door Wiring Loom Harness Cable Rear Left N/S 8T8971687S

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8D0973822

Audi Q3 F3 Flat Connector Lid Lock Connector Micro Switch Wire Bonnet 8D0973822

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0971250P

Audi S3 8V Battery Wire Cable Negative Earth Lead 95Q0971250P

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

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