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 A3 RS3 8V Impact Sound Actuator Body Control Unit Module ECU 8V0907159

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9199305

KaFAS Camera BMW F10 F11 Rear View Control Unit Module 9199305

£75.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9314229

BMW F20 Front Electronic Module Body Control Unit FEM ECU 9314229

£246.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. P13-AUDI-TT-8J-1

Audi TT 8J Head Unit Screen Radio Navigation Sat Nav Android GPS P13-AUDI-TT-8J

£237.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-6G9T-14A584-BKK

Ford Mondeo Mk4 Front Door Wiring Harness Loom Driver's Side 6G9T-14A584-BKK

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. V23134-J59-X431

Mazda 6 GJ TYCO Relay Black Unit Module 4 Pin 12V V23134-J59-X431

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2135400200

Mercedes W205 W213 W238 Fuse Box Cover Control Unit Holder Bracket A2135400200

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A6421509777-1

Mercedes W221 S320 CDI 232HP Engine Control Module ECU Set A6421509777 Automatic

£222.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 4KE907107A

Audi A6 C8 Front Camera Driver Assistance Control Unit Module zFAS 4KE907107AR

£237.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8P7907115G

Audi A3 8P 1.8 TFSI BZB 160HP Engine Control Unit ECU Kit 8P7907115G Automatic

£189.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9844140-1

BMW X3 G01 M40iX xDrive B58D 360HP Engine Control ECU Kit 9844140 Automatic

£712.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-5G2971162D

Volkswagen Golf 5G Front Door Wiring Loom Driver Side Right O/S 5G2971162D

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8380944-1

BMW E46 E65 E66 E67 Aerial Antenna Amplifier Radio Signal Trap Circuit 8380944

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-YTA500521

Land Rover L319 Positive Battery Lead Cable Wire Harness 4H22-14310-EA

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-A2055408195

Mercedes W205 Rear Fuse Box Relay Power Distribution Module Unit A2055408195

£113.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7H32-5A482-AB

Range Rover Sport L320 Anti Roll Control Module Unit ARC 7H32-5A482-AB

£94.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8662849-2

Mini Cooper S F54 F55 F56 B48 192HP Engine Control Module ECU DME 8662849 Manual

£332.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8517862-6

BMW F20 F30 F32 120d 320d 420d N47N 184HP ECU Kit DDE 8517862 + Key + FEM Manual

£123.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5A898F2

BMW F70 F74 F78 Parking Brake Wiring Harness Cable Rear 5A898F2

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. A6549003200-2

Mercedes W213 E220d OM654 194HP Engine Control ECU Kit A6549003200 Automatic

£170.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8W6971035BG

Audi A5 F5 Front Door Wiring Harness Cable Driver's Side 8W6971035BG

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8E0972081

Audi A4 B8 A5 8T 8F Starter Wiring Loom Harness Clip 8E0972081

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6924879

Front Seat Module BMW E60 E61 E65 E66 Control Unit ECU 6924879

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. K8D2-10723-AC

Range Rover Evoque L551 Battery Tray Holder Mount Support K8D2-10723-AC

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8572873-1

BMW F10 F11 535d F13 640d N57Z 313HP ECU Kit DDE 8572873 Key CAS4 Automatic

£332.95

Free delivery: Aug 28

If paid before 14:00

Part no. 03G906021PD-1

Volkswagen Caddy 1.9 TDI BLS 105HP Engine ECU Kit 03G906021PD BCM + Key Manual

£189.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. CWE100710KIT

Land Rover Radio Remote Key Fob Blade Opener Button CWE100710KIT

£56.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5NA971693K

Volkswagen Tiguan Mk2 Door Wiring Loom Harness Rear Left N/S 5NA971693K

£42.95

Free delivery: Aug 28

If paid before 14:00

Part no. 1K0915335C

Volkswagen VW Golf Mk5 Battery Tray Side Cover Panel Holder 1K0915335C

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4L0907357

Audi Q7 4L Headlight Level Range Adjustment Module Control Unit 4L0907357

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7853460

Gearbox Wiring BMW F87 M2 N55 Engine Automatic Loom Harness Cables 7853460

£94.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8835156

BMW U06 X1 U11 High-Voltage Battery Radiator Cooler Line Hose Tube Pipe 8835156

£474.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 156700-2560

Mazda 6 GJ Denso Relay Blue Unit Module 4 Pins 12V AJ51 156700-2560

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 3C0907376A

Volkswagen VW Golf Scirocco Mk3 Electric Damping Control Module 3C0907376A

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5WA919275B-KYG

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

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2124407952

Battery Cable Mercedes W212 W218 Negative Lead Terminal Harness A2124407952

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A6394460446

Mercedes Vito W639 PDC Parking Distance Control Unit Module ECU A6394460446

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8X0959673

Audi A1 8X Windscreen Heating Control Switch 8X0959673

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7L0614125A

Audi Q7 4L ABS Pump Bracket Brake Unit Mount Holder 7L0614125A

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7L0909606A

Volkswagen VW Touareg 7L Front Impact Crash Sensor Left Right N/O/S 7L0909606A

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2044409734-1

Mercedes C204 Front Bumper PDC Wiring Parking Sensor Loom Harness A2044409734

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8605530

Engine Unit Bracket BMW G30 G31 G11 G15 ECU Module Holder Bracket Mount 8605530

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1679001419

Bluetooth Module Mercedes W167 W205 Multimedia Control Unit ECU A1679001419

£80.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4N0035502D

Audi S3 8Y Wireless Charging Station Phone Control Module Unit 4N0035502D

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2055401410

Mercedes S205 C253 Rear Door Harness Wiring Cable Left Right N/O/S A2055401410

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. A6519009002

Mercedes W212 E300 BlueTEC Hybrid 204HP Engine Control Module ECU A6519009002

£94.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 9149674

BMW 3 5 Series E60 E90 Portable DVD System Alarm Ultra Sonic Module Unit 6980090

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9264572

BMW E90 LCI Junction Box Body Control Module H1 PL2RR JBBFE IIIR 9264572

£66.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8P0035464

Audi A3 S3 8P Audio Amplifier Mount Bracket Holder Right O/S 8P0035464

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 95861200811

Porsche Cayenne S 92a Power Electronics Cable Wire Harness Loom 95861200811

£664.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A1669005412

Mercedes W166 Door Module Rear Left N/S Control Unit ECU A1669005412

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 03L906018QK

Skoda Yeti Mk1 5L 2.0 TDI CFHF 4x4 Engine Control Unit ECU 03L906018QK Manual

£123.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8518568

BMW F20 F30 F32 120d 320d 420d Diesel N47N 184HP Engine Control ECU DDE 8518568

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. UM4667720

Mazda 6 GJ Relay 5-Pin Electrical Unit Multi-Purpose Relay Grey UM4667720

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 03L906018KP-1

Audi TT 8J CFGB 2.0 TDI Quattro 170HP Engine ECU Kit 03L906018KP Automatic

£104.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 6C1T-14A481-AA

Ford Transit Mk7 Fuse Box Body Control Module ECU 6C1T-14A481-AA

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9289679

BMW X5 F15 X6 F16 Antenna Amplifier Control Unit Module 9289679

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-LR144731

Range Rover Velar L560 Front Door Wiring Harness Cable Right O/S M8A2-14687-BB

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2135451540

Camera Module Bracket Mercedes W213 S213 Rear Housing Left N/S A2135451540

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A0015456403

Mercedes Sprinter W906 Fuse Box Relay Cover Box Cap A0015456403

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. C1B1-12A650-FK

Ford Fiesta Mk7 1.0 Ecoboost SFJA 100HP Engine Control ECU C1B1-12A650-FK Manual

£42.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A2074405734

Mercedes W207 Wiring Loom Harness Cable A2074405734

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6G9T-14A076-CA

Ford Mondeo MK4 Fuse Box Cover Panel Hosing Lid 6G9T-14A076-CA

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A6429002900-4

Mercedes W204 C350 CDI OM642.830 Engine Module ECU Kit A6429002900 Key Lock

£427.95

Free delivery: Aug 28

If paid before 14:00

Part no. A4539050200

Smart 453 Fortwo Door Pressure Crash Impact Sensor Front Left N/S A4539050200

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8T0035223J

Audi A4 B8 Suond Amplifier System Speaker Module Unit 8T0035223J

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A9075407160

Mercedes W907 W910 Battery Electrical Wiring Harness Ground Line A9075407160

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8J0971679B

Audi TT 8j TTS Glove Box Dash Panel Storage Wiring Cable Harness Wire 8J0971679B

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7446712

BMW F23 Cabrio Convertible Folding Top Roof ECU Control Unit CVM Module 7446712

£108.95

Free delivery: Aug 28

If paid before 14:00

Part no. 05L907309

Audi A4 B9 A5 F5 30 TDI DTNB 136HP Engine Control Unit ECU 05L907309 Automatic

£237.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 9251722

BMW F20 Front Left Door N/S Wiring Loom Harness Cables 9251715

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1728602402

Mercedes SLK R172 Front Seat Side Air Module Unit Right O/S A1728602402

£85.95

Free delivery: Aug 28

If paid before 14:00

Part no. FH22-14B006-BB

Range Rover Sport L494 Air Crash Impact Sensor Left Right N/O/S FH22-14B006-BB

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5H2Z-14A686-BA-1

Land Rover Discovery 3 L319 Crash Impact Sensor Left Right N/O/S 5H2Z-14A686-BA

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. R8D2-14633-EAA

Range Rover Evoque L551 Door Wiring Harness Loom Rear Left N/S R8D2-14633-EAA

£94.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A2135406631

Mercedes W213 Rear Door Wiring Harness Cable Left N/S A2135406631

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9T11-12A650-HG

Ford Transit Connect Engine Control Unit ECU ECM Module 9T11-12A650-HG

£142.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A2721535591

Mercedes A209 Engine Control Unit Module ECU 231HP Petrol Automatic A2721535591

£237.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A1131533479

Mercedes W163 W211 W220 Engine Control Unit ECU 279HP S430 Automatic A1131533479

£180.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 9140942-BAR1

BMW E87 E90 E91 LCI Rear PDC Ultrasonic Parking Sensor SET X2 Barberarot - A39

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2469005413-1

Mercedes C117 Head Unit Radio Player Control Module Becker A2469005413

£237.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A2478207502

Mercedes C118 W177 W243 W247 Centre Console Dual USB-C Socket Ports A2478207502

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2045451047

Control Unit Bracket Mercedes W204 W212 Audio Module Holder Mount A2045451047

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2118203375

Antenna Booster Mercedes W211 Rear Boot Lid Tailgate Amplifier A2118203375

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8R0907468AE

Audi A5 8T 2.0 TDI Gateway Control Module Unit ECU 8R0907468AE

£56.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4K0971228N

Audi A6 C8 Starter Wiring Harness Cable 4K0971228N

£123.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 4L0907282B

Audi A7 4G8 Glow Plug Control Unit Controller Module 4L0907282B

£56.95

Free delivery: Aug 28

If paid before 14:00

Part no. GJ32-14D620-BA

Land Rover Discovery Sport L550 Door Module Rear Driver's Side GJ32-14D620-BA

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A6519000601-4

Mercedes W906 210 CDI 651.956 95HP Engine ECU Kit A6519000601 Ignition + Key

£237.95

Free delivery: Aug 28

If paid before 14:00

Part no. LR001303

Land Rover Freelander L359 Glow Plug Wiring Loom Harness Cable Diesel 9661631680

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8642705-1

Mini Cooper F56 B38 136HP Engine Control ECU DME Kit 8642705 Automatic

£189.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 7802929

BMW 5 7 E60 E61 E65 M57N M57N2 Compact Alternator Generator VALEO 170A 7802929

£132.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8661835

BMW F45 Active Tourer 225xe High Voltage Inverter Converter Unit 8661835

£398.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8R0971502A

Audi Q5 8R Battery Fuse Box Terminal Retaining Mount Bracket Holder 8R0971502A

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. DK62-44250-AD

Land Range Rover Sport L494 Tailgate Hinge Cover Trim Right O/S DK62-44250-AD

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. FW93-19C024-AB

Range Rover Sport L494 Bluetooth Antenna Amplifier Module FW93-19C024-AB

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2055400428

Battery Wiring Mercedes GLC X253 C253 Diesel OM651 Starter Cable A2055400428

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4G8959792J

Audi A7 4G8 Door Control Module Front Passenger Side 4G8959792J

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9209447

Antenna Amplifier BMW F01 Aeral Diversity 868 MHZ Control Unit FM DAB 9209447

£28.95

Free delivery: Aug 28

If paid before 14:00

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