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

£94.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. RHD-LR021058

Land Rover Discovery 4 L319 Door Wiring Harness Front Left N/S BH22-14630-ADA

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A7899829900

Mercedes H243 EQA Fuse Switch Control Unit Sensor Orange A7899829900

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6866254

BMW F40 F45 Mini F56 SAS Module Steering Angle Sensor Control Unit ECU 6866254

£118.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 6868255

Air Module BMW F20 F21 F30 F31 F32 F36 ECU ICM Plus SRS Control Unit 6868255

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 3M51-13K031-AF

Ford Kuga Mk1 C-Max Headlight Control Unit Module 3M51-13K031-AF

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. A9078203000

Mercedes Sprinter W907 Double Seat Seatbelt Buckle Wiring Cable A9078203000

£56.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5B50DE2

BMW U06 Active Tourer Rain Light Solar Condensation Sensor 5B50DE2

£85.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2128200485

Mercedes W212 SRS Air Module Crash Control Unit ECU A2128200485

£42.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-1K8971120BE

VW Volkswagen Scirocco Mk3 Door Wiring Harness Loom Driver's Side 1K8971120BE

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1644404401

Mercedes W251 SAM Rear Control Unit Central Electrics Module A1644404401

£474.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5A088E6

BMW G20 Engine Control Unit ECU 258 HP 330i B48D 5A088E6 Automatic

£237.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 03L906022TP

Seat Leon FR 1P 2.0 TDI CEGA 170HP Engine Control ECU Kit 03L906022TP Automatic

£123.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9288299

BMW F20 F30 F31 Body Comfort Module Control Unit FEM 9288299

£75.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9068600602

Volkswagen Crafter Air Module Control Unit Module ECU 9068600602

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1645403130

Mercedes W164 Positive Battery Cable Wiring A1645403130

£142.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5N0131552D

VW Volkswagen Tiguan 5N DPF Sensor Mount Bracket Holder Retainer 5N0131552D

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7609656-3

BMW Z4 E89 Roadster 23i N52N 204HP ECU Kit DME 7609656 CAS3 Key Manual

£284.95

Free delivery: Aug 28

If paid before 14:00

Part no. C1BT-14B321-CE

Ford Fiesta Mk7 Air Module Control Unit ECU C1BT-14B321-CE

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. 1454649-1

Ford Ranger Mk4 Radio CD DVD Player Head Unit Navigation UW1B66DSXD

£70.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 4H0959795B

VW Touareg 7L Rear Door Control Unit Module Left Right N/O/S ECU 4H0959795B

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4K0035063A

Audi A6 C8 Central Media Unit Head Unit Navigation Control MIB2+ HIGH 4K0035063A

£284.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. DS7T-15603-CA

Volkswagen Amarok Mk2 Keyless Entry Antenna Amplifier Module ECU DS7T-15603-CA

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2789001300-1

Mercedes R231 SL63 AMG M157.983 585HP Engine ECU Kit A2789001300 Ingition + Key

£854.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8485066

BMW X3 G01 X4 G02 Positive Cable Alternator Starter Base B Wire Line 8485066

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6822072

Mini Cooper F55 F56 Navigation DAB Head Unit High Control Unit 6822072

£284.95

Free delivery: Aug 28

If paid before 14:00

Part no. 95B907530E

Porsche Cayenne 92A Body Gateway Module ECU Control Unit 95B907530E

£42.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9128569-1

BMW 1 Series E81 E82 E87 LCI E88 Wiring Harness Air Valve Air Flap 9128564

£18.95

Free delivery: Aug 28

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Part no. A0009053006

Battery Wire Mercedes W205 Negative Cable With Battery Sensor 48V A0009053006

£75.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8K0951253-2

Audi VW Volkswagen Seat Relay 643 Unit Module 4 Pins Set X3 8K0951253

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. BK3T-14335-BC

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

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4L0035225AJ

Audi Q7 4L Radio Aerial Antenna Amplifier AM/FM 4L0035225AJ

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6837090

BMW G30 G31 Fuse Box Control Unit Module 6837090

£123.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. K95301AE

Range Rover Sport L494 Discovery Parking Aid Control Module ECU K95301AE

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8D0951253A-1

VW Audi Seat Skoda Multi Use Relay Module 4 Pins 373 Black 12V 40A 8D0951253A

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A6421506891

Mercedes W251 R320 CDI OM642.950 224HP Engine Module ECU A6421506891 Automatic

£142.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8573779

BMW F10 530d F30 330d 258HP N57N Engine Control Unit ECU DDE 8573779 Automatic

£75.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7253188-2

BMW E92 Seat Covering Panel Sports Left Right Thigh Support Cover Black Leather

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6823581

BMW G30 G31 G11 G12 A/C Air Conditioning Compressor Cable Harness Loom 6823581

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4H0035670P

Audi A8 S8 4H A8 D4 MMI Control Unit Player MMI 3G+ SAT NAV Bluetooth 4H0035670P

£199.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 7L6971693P

Volkswagen Touareg 7L Rear Door Wiring Loom Harness Cables 7L6971693P

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8V4971035A

Audi A3 8V Front Door Wiring Loom Harness Cable Driver Side 8V4971035A

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 2Q0937090F

Volkswagen Polo IV Body Control Module Unit BCM ECU 2Q0937090F

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8579482

BMW F20 F21 116d ed Diesel N47N 116HP Engine Control ECU DDE 8579482 Manual

£75.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6825523

Mini F55 F56 F57 Body Domain Controller BDC Comfort Control Unit 6825523

£208.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-99161101401

Porsche 718 Boxster 982 Battery Cable Negative Minus 99161101401

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8506666-2

Mini Cooper D R60 ALL4 N47N Diesel Engine ECU Kit DDE 8506666 CAS3 Key Manual

£142.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8584277

BMW F30 F31 320dX Diesel N47N 184HP Engine Control ECU Kit DDE 8584277 Automatic

£142.95

Free delivery: Aug 28

If paid before 14:00

Part no. E83-LCI-SCREEN

BMW X3 E83 LCI Head Unit GPS Navigation Display Screen Android Auto CarPlay 9"

£237.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 1K0959433AR

Volkswagen TOURAN 1T Body Control Comfort Unit Module BCM Unit ECU 1K0959433AR

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-99655110200

Porsche Boxster 986 Fuse Box Cover Carpet Panel Trim 99655110200

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5N0035342G

VW Volskwagen Polo 6R Multimedia Electronic ECU Control Unit Module 5N0035342G

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5WA907007AC

Volkswagen Golf Mk8 Air Conditioning A/C Control Unit Module 5WA907007AB

£94.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8605456

Engine Wiring BMW F21 F30 LCI F36 N20 Loom Module Harness Cable 8605456

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8514735

BMW F20 F21 116d ed N47N 116HP Engine Control Unit Module ECU DDE 8514735 Manual

£142.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2214403913

Mercedes W221 Door Wiring Front Left N/S Harness Loom A2214403913

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8P0862335Q-1

Audi A4 B7 Harman Becker Bluetooth Module Interface Control Unit 8P0862335Q

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. BJ32-19G255-BA

Range Rover L405 TV Amplifier Aerial Receiver Unit BJ32-19G255-BA

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. CX23-18K891-CA

Land Rover Discovery Sport L550 Aerial Antenna Amplifier Unit CX23-18K891-CA

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8583423-8

Mini R60 Cooper SD N47N 143HP Engine Control Unit ECU DDE 8583423 Automatic

£85.95

Free delivery: Aug 28

If paid before 14:00

Part no. 1301331173

BMW F45 Front Headlight Led Module Control Unit 1301331173

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-8E2919094C

Audi A4 B7 Cabrio Daytime Runing Lights DRL Module Unit 8E2919094C

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9384100

Mini F54 Clubman F60 Countryman KaFAS Camera Windscreen Unit Front 9384100

£37.95

Free delivery: Aug 28

If paid before 14:00

BMW F15 F85 F16 F86 Steering Wheel Lane Change Control ECU Module 7849446

-1%

Part no. 7849446-1

BMW F15 F85 F16 F86 Steering Wheel Lane Change Control ECU Module 7849446

Promo price

£66.95

£66.45

Free delivery: Aug 28

If paid before 14:00

Part no. 6800903-2

Mini R50 R52 R53 Steering Wheel Horn Switch Left Right N/O/S Set 6800903

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2139005728

Mercedes W213 W238 W257 Head Radio Navigation Switch Control Unit A2139005728

£94.95

Free delivery: Aug 28

If paid before 14:00

Part no. N8B2-14B227-AB

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

£759.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8579480-1

BMW F20 120d F30 320d F10 520d N47N 184HP Engine Control Unit DDE 8579480 Manual

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1779005401

Mercedes C205 C63 AMG 510HP Engine Control Unit ECU A1779005401 Automatic

£332.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 9294912-1

BMW F10 F11 X5 F15 X6 F16 Rear Seat Compartment Screen Display 9294912

£237.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A2465400950-1

Mercedes C117 W176 W246 Fuse Box Power Distribution Box A2465400950

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A9075409682

Mercedes Sprinter W907 W910 Fuse Box Relay Box Fuse Box Module A9075409682

£75.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7357876430

Citroën Relay Mk3 III Stereo Sat Nav CD Radio Player Head Unit 7357876430

£484.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8V4971030

Audi A3 8V Front Door Wiring Loom Harness Passenger Side 8V4971030

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 09D927750JF

Audi Q7 4L Automatic Transmission Module Control Unit 3.0 TDI 09D927750JF

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2075400009

Mercedes C204 C207 Roof Headliner Wiring Loom Harness A2075400009

£28.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 6960219

Airbag Module BMW E65 E66 Airbag A-Pillar Sensor Left N/S Control Unit 6960219

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9824983

BMW F20 F30 F87 M2 LCI Radio CD Player Navigation High Head Unit 9824983

£474.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1668203426

Mercedes W166 C292 Front Seat Adjuster Module Unit Left Right N/O/S A1668203426

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8P0035535

Audi A4 B7 Amplifier Bracket Aerial Antenna Module Mount Holder 8P0035535

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8N0906018AP-1

Audi S3 8P 1.8T BAM 225HP Petrol Engine Control Unit ECU 8N0906018AP Manual

£170.95

Free delivery: Aug 28

If paid before 14:00

Part no. BH42-14D617-AA

Land Rover 4 L319 Front Door Control Unit Module Passenger Side BH42-14D617-AA

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2075451740

Mercedes-Benz A207 W207 Cabrio Control Unit Module Bracket Holder A2075451740

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4L1937503

Audi Q7 4L Fuse Relay Box Module Electrical Control Unit 4L1937503

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2128270228-DWM

Mercedes W212 Roof Antenna Shark Diamond White Metallic - 799 A2128270228

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 2Q0907686E

VW Golf Gti CD1 Blind Spot Lane Change Control Module Rear Right O/S 2Q0907686E

£89.95

Free delivery: Aug 28

If paid before 14:00

Part no. 83A971035DA

Audi Q3 F3 Door Wiring Loom Harness Cable Front Driver's Side O/S 83A971035DA

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. F1ET-14B533-BE

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

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-A2135405048

Mercedes W213 Front Door Wiring Harness Cable Loom Left N/S A2135405048

£75.95

Free delivery: Aug 28

If paid before 14:00

Part no. GK62-14E108-AB

Range Rover Sport L494 Rear Tailgate Hands Free Motion Sensor GK62-14E108-AB

£32.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1729001405

Mercedes R172 Player Radio Audio Navi Head Unit A1729001405

£303.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2048708626

Mercedes W212 Media Interface Control Module Unit ECU A2048708626

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5K0837202Q

VW Volkswagen Golf 6 Remote Key Radio Alarm Key Fob Opener 3 Button 5K0837202Q

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-7CC971154A

Volkswagen Crafter SY Mk2 Power Steering Rack Wiring Harness Cable 7CC971154A

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8606022

BMW F10 F11 523i N53 204HP Engine Control Unit ECU DME 7614366 Automatic

£664.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 6950374

Door Cable BMW E65 Loom Rear Right O/S Wiring Harness 6950349

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6807322

Positive Cable BMW F90 M5 G30 Battery Wire Lead Underfloor Wiring 6807323

£75.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2168200089

Mercedes CL C216 Antenna Amplifier Control Unit Module A2168200089

£94.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6951629

BMW Z4 X3 E83 E85 Mini R50 DVD GPS Navigation System Computer 6951629

£113.95

Free delivery: Aug 28

If paid before 14:00

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