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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BMW X5 X6 Series E70 E71 Seat Backrest Adjustment Adapter Lead Cable 9118468

€23.95

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Part no. 04L906021CA

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

€142.95

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Volkswagen Jetta A6 Bumper Cable Wiring Harness Loom 5CU971095

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Free delivery: Sep 11 – 15

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Part no. 9348935

BMW X1 F45 F48 Mini F55 F56 F60 Air Module Control Unit Module ECU 9348935

€94.95

Free delivery: Sep 14 – 15

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Part no. BJ32-14301-AD

Range Rover Evoque L538 Negative Minus Earth Battery Cable BJ32-14301-AD

€23.95

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Part no. 9151348

BMW F07 HV Battery Positive Terminal Lead Clamp Wire Harness Cable Loom 9151348

€37.95

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Part no. 4G9945096B-1

Audi A6 C7 Rear Tail Light Wire Wiring Cable Right O/S 4G9945096B

€23.95

Free delivery: Sep 14 – 15

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Part no. 4K0035502B

Audi A5 F5 A6 C8 Wireless Centre Console Phone Charging Module Unit 4K0035502B

€51.95

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Part no. 8370933

BMW 3 5 6 Series E60 E61 E63 E90 Support Bracket Navigation Computer 8370933

€23.95

Free delivery: Sep 14 – 15

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Part no. 03L906018CK-1

Skoda Superb B6 VW Golf 5K Engine Control Unit 170 HP 2.0 TDI CFGB 03L906018CK

€450.95

Free delivery: Sep 14 – 15

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Part no. 7550017

Mini Cooper One Clubman R55 R56 R58 R59 R60 Starter Motor 1.6 Engine 7550017

€23.95

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Part no. 070903139X

Volkswagen Transporter T5 Alternator 14V 150A 2.5 TDI AXE 070903139X 070903024A

€61.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W8971036E

Audi A5 S5 RS5 F5 Door Wire Harness Wiring Front Right O/S 8W8971036E 8W8971036G

€66.95

Free delivery: Sep 14 – 15

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Part no. 9208452

Wiring BMW F07 Front Bumper PDC Wiring Park Assist Sensor Harness 9208452

€70.95

Free delivery: Sep 14 – 15

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Part no. A2469003014

Mercedes W176 W231 W246 Electric Parking Brake Control Unit Module A2469003014

€23.95

Free delivery: Sep 14 – 15

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Part no. N8B2-14B227-AB

Land Rover Defender L663 Range Rover L560 DC/DC Converter Module N8B2-14B227-AB

€949.95

Free delivery: Sep 14 – 15

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Part no. 420919275-BLM

Audi A5 8T Rear Bumper PDC Parking Distance Sensor Black Magic Pearl - C9Z

€23.95

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Part no. 03G903016L-1

Audi A6 C6 FL CAGB Diesel Engine Alternator Generator Bosch 14V 180A 03G903016L

€56.95

Free delivery: Sep 14 – 15

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Part no. A2055409414

Mercedes C253 S205 Front Door Wiring Loom Cable Harness Right O/S A2055409414

€42.95

Free delivery: Sep 14 – 15

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Part no. 07K903023F

Audi RS3 8P RSQ3 8U Alternator Generator BOSH 14V 140A 07K903023F

€70.95

Free delivery: Sep 14 – 15

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Part no. L8B2-19L300-PN

Range Rover Evoque L551 Sat Nav Radio Multimedia Head Unit L8B2-19L300-PN

€503.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4G0907589C

Audi A7 4G 3.0TDI CGQB 313HP Quattro Engine Control ECU 4G0907589C Automatic

€203.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9866980

BMW F20 Body Control Unit Module REM Fuse Box 9866980

€23.95

Free delivery: Sep 14 – 15

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Part no. 13720856

Mercedes W212 Negative Cable Battery Terminal Wiring 13720856

€23.95

Free delivery: Sep 14 – 15

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Part no. A2075400009

Mercedes C204 C207 Roof Headliner Wiring Loom Harness A2075400009

€32.95

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Part no. 7831186

BMW E46 M3 Starter Motor Positive Battery Cable Lead Wiring Harness 7831186

€23.95

Free delivery: Sep 14 – 15

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Part no. 6G9T-14B192-EA

Ford Fiesta Transit Relay 4-Pin Grey FoMoCo Unit 6G9T-14B192-EA

€23.95

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Part no. 4F0907280A

Audi A6 C6 On Board Onboard Supply Module Control Unit ECU 4F0907280A

€23.95

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Part no. 7391043

BMW F10 X1 F48 Mini F54 Rear Tailgate Smart Opener Bottom Wire Sensor 7391043

€32.95

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Part no. 2670531

Ford Transit Custom Engine Wiring Harness Loom Manual KK2T-9K499-CCE

€123.95

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Part no. D1BT-14D212-CC

Ford Fiesta Mk7 Bluetooth Control Module Unit ECU D1BT-14D212-CC

€23.95

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Part no. 1J0927841

Audi Volkswagen Seat Skoda ESP Relay Unit Grey 444 1J0927841

€23.95

Free delivery: Sep 14 – 15

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Part no. 1K0909605T

VW Volkswagen Golf Mk5 V 1K Air Module Control Unit ECU 1K0909605T

€23.95

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Part no. 8P0035613

Audi A3 8P Bluetooth Module Multimedia Control Unit Cover Unit 8P0035613

€23.95

Free delivery: Sep 14 – 15

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Part no. 5E3971392AC

Skoda Octavia VR Seat Frame Wiring Harness Cable Front Right O/S 5E3971392AC

€32.95

Free delivery: Sep 14 – 15

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Part no. 8K0941824B

Audi Q5 8R Q7 4L A7 4G Fuse Box Connector Socket Module Unit 8K0941824B

€23.95

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Part no. 4H0971142C

Audi A8 D4 Door Card Wiring Loom Cable Harness Rear Right O/S 4H0971142C

€23.95

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Part no. F1ET-14B533-BE

Ford Focus Mk3 Front Door Control Module Passenger Side F1ET-14B533-BE

€23.95

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Part no. A2129061903-2

Mercedes S212 Boot Tailgate Lamp Inner Left N/S Wire Harness Loom A2129061903

€23.95

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Part no. 5A2D542

BMW F40 Body Control Module Domain Controller Unit BDC ECU 5A2D542

€94.95

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Part no. LR025823

Land Rover Vogue L322 Alternator Generator Mount Bracket Holder BH42-10239-BA

€23.95

Free delivery: Sep 14 – 15

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Part no. 8573779-1

BMW F30 330dX 258HP N57N Control Unit Module ECU DDE 8573779 Key FEM Automatic

€308.95

Free delivery: Sep 14 – 15

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Part no. 7273667

BMW F30 F31 F32 Rear Tailgate Smart Opener Lower Antenna 7273667

€23.95

Free delivery: Sep 14 – 15

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Part no. 8809737

PDC Wiring BMW X4M F98 G02 Rear Bumper Parking Assistance Sensor Harness 8809737

€89.95

Free delivery: Sep 14 – 15

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Part no. 82A971589B

Audi A1 GB S3 8Y Multifunction Steering Wheel Button Wiring Harness 82A971589B

€23.95

Free delivery: Sep 14 – 15

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Part no. 9436281

BMW G20 G21 Front Door Wiring Loom Harness Cable Driver Side 9436281

€42.95

Free delivery: Sep 14 – 15

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Part no. 8P0035503M-1

Audi A6 C6 Bluetooth Antenna Module Control Unit ECU 8P0035503M

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9146329-1

BMW X5 E60 E61 E65 E70 Front Left N/S Seat Angle Adjustment Drive 9146329

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 000051446C

VW Volkswagen Golf Mk6 5K Digital Media Adapter Cable Wiring Loom 000051446C

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8C1T-18C815-AC

Ford Transit Mk7 Radio CD Player 6000 Single CD Head Unit 8C1T-18C815-AC

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5K0837202Q-1

Volkswagen VW Golf Mk6 Remote Key Radio Alarm Key Fob Opener 3 Button 5K0837202Q

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0937084M

Volkswagen VW Golf Mk7 BCM Convenience Body Control Module Unit ECU 5Q0937084M

€37.95

Free delivery: Sep 14 – 15

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Part no. A2218708285

Mercedes W221 Head Unit DVD High Line Radio Player Navigation A2218708285

€560.95

Free delivery: Sep 14 – 15

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Part no. AH22-18N378-AB

Land Rover Discovery 4 L319 Battery Tray Holder Trim Right O/S AH22-18N378-AB

€23.95

Free delivery: Sep 14 – 15

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Part no. 8J0035456

Audi S5 8T Antenna Amplifier Aerial Control Module Unit ECU 8J0035456

€23.95

Free delivery: Sep 14 – 15

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Part no. 02E911024H

Volkswagen Seat Skoda Audi 2.0 TDI Diesel Engine Starter Motor Valeo 02E911024H

€61.95

Free delivery: Sep 14 – 15

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Part no. 8V4971687Q

Audi A3 8V Rear Door Wiring Left Right N/O/S Harness Loom Cable 8V4971687Q

€23.95

Free delivery: Sep 14 – 15

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Part no. 9137804

Mini Cooper One R55 R56 R57 R58 R59 Drivers Door Wiring Harness Loom 9137804

€23.95

Free delivery: Sep 14 – 15

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Part no. 057906051H-3

Audi RSQ3 F3 DPF Differential Pressure Sensor 2.5 TFSI 057906051H 83A131552G

€113.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1648204426

Mercedes W251 Air Module Control Unit ECU A1648204426

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7P0971599B

Porsche Cayenne S 92a Wiring Harness Wire Cable Battery Alternator 7P0971599B

€23.95

Free delivery: Sep 14 – 15

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Part no. A2055401302

Mercedes C205 Positive Battery Wiring Loom Harnes Cable A2055401302

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7273666

BMW F30 F31 F32 Rear Tailgate Smart Opener Upper Antenna 7273666

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1T0035577AF

VW Volkswagen Touran 1T Aerial Amplifier Control Unit Module 1T0035577AF

€23.95

Free delivery: Sep 14 – 15

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Part no. 5WB959107

Audi Q3 F3 Rear Tailgate Bootlid Control Unit Module ECU 5WB959107

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 39113-2A511

Kia Ceed I 1.6 CRDI 115HP D4FB Diesel Engine Control ECU 39113-2A511 Manual

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8606306

BMW F10 F11 F30 184 HP Petrol N20 Engine Control Unit ECU DME 8606306 Manual

€332.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0004461160

Mercedes Sprinter W906 FleetBoard Onboard Time Recorder Control Unit A0004461160

€113.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9340996

BMW F87 Door Wire Harness Cable Loom Front Passenger's Side 9340996

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1K8955557

Volkswagen Scirocco Mk3 Door Crash Impact Pressure Sensor Unit 1K8955557

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0005400764

Mercedes W205 Battery Negative Ground Bonding Line Wire Earth Cable A0005400764

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 06A903141P

Audi A3 8L Alternator Tensioner Pulley Ancillary Bracket 1.8T APY 06A903141P

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2215403110

Mercedes W221 Positive Battery Cable Wire A2215403110

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. LS7T-14B321-CC

Ford Mondeo Mk5 Restraint Control Module Air Unit Diagnostic ECU LS7T-14B321-CC

€94.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1729007500

Mercedes W204 Seat Module Memory Control Unit Front Left N/S A1729007500

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5A08539

BMW G20 G21 330e Hybrid Fuel Pump Control Module ECU 5A08539

€23.95

Free delivery: Sep 14 – 15

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Part no. 4M0971237S

Audi Q7 4M Q8 Mk1 Battery Negative Cable Wiring Earth Line 4M0971237S

€37.95

Free delivery: Sep 14 – 15

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Part no. 6958449

BMW 7 Series E65 E66 E67 Control Unit Door Rear Driver Side 61356958449 6958449

€23.95

Free delivery: Sep 14 – 15

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Part no. 7G9N-10300-EA

Ford Mondeo Mk4 S-Max Alternator Generator 2.0 TDCI 7G9N-10300-EA

€51.95

Free delivery: Sep 14 – 15

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Part no. 7M0951253C-1

VW Volkswagen T5 Audi Seat Skoda Relay Black Control Unit 5 Pin 12V 7M0951253C

€23.95

Free delivery: Sep 14 – 15

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Mini R50 One D Diesel W17 Cable Starter Base B- Wire 6923502

€23.95

Free delivery: Sep 14 – 15

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Part no. 9322685

BMW F20 F21 F22 Stereo Audio Sound Amplifier Booster Module Unit 9322685

€156.95

Free delivery: Sep 14 – 15

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Part no. 2Q0937090A

Volkswagen Polo Gti AW1 Body Control Module BCM Unit 433MHZ 2.0 TFSI 2Q0937090A

€42.95

Free delivery: Sep 14 – 15

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Part no. 9G9T-14240-HBB

Ford Mondeo Mk4 Door Wiring Harness Loom Cable Rear Right O/S 9G9T-14240-HBB

€23.95

Free delivery: Sep 14 – 15

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Part no. A0009068206

Alternator Generator Mercedes W177 W247 M260 Petrol Engine 200A 14V A0009068206

€332.95

Free delivery: Sep 14 – 15

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Part no. AV6N-19G481-AM

Ford Focus Mk3 Keyless Entry Control Module ECU Unit AV6N-19G481-AM

€23.95

Free delivery: Sep 14 – 15

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Part no. 8681185

BMW F40 F44 F46 X1 F48 Mini F54 F56 F57 F60 Engine Wiring Loom Harness 8681185

€23.95

Free delivery: Sep 14 – 15

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Part no. A1725404009

Mercedes R172 Wiring Cable Harness Front Driver's Door Wiring Loom A1725404009

€23.95

Free delivery: Sep 14 – 15

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Part no. A1669007809

Mercedes GLE W166 Rear Door Wiring Control Module Left N/S Unit ECU A1669007809

€32.95

Free delivery: Sep 14 – 15

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Part no. 1J0941385A

Audi TT 8N VW Golf Mk4 Relay Box Cover Housing Panel 1J0941385A

€23.95

Free delivery: Sep 14 – 15

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Part no. 4G0971765E

Audi A7 4G8 3.0 TDI Adblue Tank Pump Wiring Loom Harness Loom 4G0971765E

€23.95

Free delivery: Sep 14 – 15

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Part no. 03L906018GF-2

Volkswagen Scirocco Mk3 2.0 TDI 140HP Engine Module ECU Kit 03L906018GF Manual

€170.95

Free delivery: Sep 14 – 15

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Part no. 000937615B

Audi Q3 F3 Volkswagen Tiguan 5N Jetta Mk4 Fuse Relay Box 000937615B

€32.95

Free delivery: Sep 14 – 15

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Part no. BK3T-14335-BC

Ford Transit Mk8 Interior Reading Roof Light Wiring Harness Cable BK3T-14335-BC

€23.95

Free delivery: Sep 14 – 15

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BMW F20 F30 F31 Fuse Box Electrical Power Distribution 9303543

€56.95

Free delivery: Sep 14 – 15

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Part no. CPLA-14F720-BK

Range Rover Evoque L538 DAB Radio Control Unit Module CPLA-14F720-BK

€99.95

Free delivery: Sep 14 – 15

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Part no. 8W6945094H-1

Audi A5 S5 F5 LED Tail Light Lamp Wire Harness Cable Right O/S LED 8W6945094H

€23.95

Free delivery: Sep 14 – 15

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Part no. A1728208710

Mercedes W176 W246 Roof Towing Alarm Sensor Switch Module A1728208710

€23.95

Free delivery: Sep 14 – 15

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BMW G30 Seat Occupancy Sensor Mat Passenger Side Control Unit Module 9304007

€32.95

Free delivery: Sep 14 – 15

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