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 1 3 Series E87 E90 E91 LCI Rear PDC Ultrasonic Parking Sensor Barbera Red

£13.95

Free delivery: Aug 27

If paid before 14:00

Parking Sensor Mercedes W169 W204 W212 PDC Sensor Front Mountain Gray 787

-5%

Part no. A2215420417-MB

Parking Sensor Mercedes W169 W204 W212 PDC Sensor Front Mountain Gray 787

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. 7634056

Engine Wiring BMW F20 F21 F30 F31 N20 Cable Loom Harness 7634056

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6782372

BMW X1 X3 Z4 E83 LCI E84 E89 E90 E91 E92 Speed Sensor Cluster 6782372

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2218707526

Mercedes W221 Air Module Control Unit ECU SRS Module A2218707526

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8708257

Head Unit BMW F20 F21 F22 F30 F31 LCI Sat Nav Radio Media Navigation 8708257

£303.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 8321087

BMW 5 SERIES E60 ELECTRIC SEAT Height Adjust 0390203234 8321087

£13.95

Free delivery: Aug 27

If paid before 14:00

Control Unit BMW F10 F11 Body Module ECU JBBFE IIIR V2 PL6 ECU 9267456

-5%

Part no. 9267456

Control Unit BMW F10 F11 Body Module ECU JBBFE IIIR V2 PL6 ECU 9267456

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. A2129004711

Fuse Box Mercedes W204 W212 Front Relay Control Unit SAM Module A2129004711

£132.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8P1862335

Audi A3 8P Telematics Bluetooth Module Control Unit ECU 8P1862335

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1729008600

Mercedes W204 Display Screen Multimedia Navigation Dashboard Unit A1729008600

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-5Q2971111CB

Audi A3 8V Power Steering Rack Wiring Harness Loom Cable 5Q2971111CB

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9257009

BMW F01 F10 CIC Professional Unit Sat Nav Infotainment DAB Radio Player 9257009

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9375871

MINI Cooper F56 Front Right O/S Driver Side Door Wire Wiring Loom 6809470

£32.95

Free delivery: Aug 27

If paid before 14:00

Volkswagen Touran 1T Parking Control Unit Module Sensor 1K0919283A

-5%

Part no. 1K0919283A

Volkswagen Touran 1T Parking Control Unit Module Sensor 1K0919283A

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. 1K0906093H

Seat Ibiza 6J 1.2 TSI Petrol Fuel Pump Control Unit Relay 1K0906093H

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8X0907063R

Audi A1 8X Central Gateway Control Unit Module Relay Supply ECU 8X0907063R

£28.95

Free delivery: Aug 27

If paid before 14:00

BMW 1 2 Series F20 F21 F22 Positive Plus Pole Battery Blow Cable Part 9253111

-5%

Part no. 9253111-1

BMW 1 2 Series F20 F21 F22 Positive Plus Pole Battery Blow Cable Part 9253111

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. A0009006318

PDC Module Mercedes W205 W213 W247 Parking Assistant Parktronic Unit A0009006318

£75.95

Free delivery: Aug 27

If paid before 14:00

Mercedes Relay Fuse Unit Module 4 Pins Grey A0045452905

-5%

Part no. A0045452905

Mercedes Relay Fuse Unit Module 4 Pins Grey A0045452905

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. A2038206385

Mercedes-Benz C-Class W203 Airbag System Control Unit Module ECU A2038206385

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9316575

BMW 1 2 Series F20 F21 F22 Battery Cable Lead Positive Underfloor 9316575

£65.95

Free delivery: Aug 27

If paid before 14:00

Mercedes ML W164 Battery Positive Cable Wiring A1645402830

-5%

Part no. A1645402830

Mercedes ML W164 Battery Positive Cable Wiring A1645402830

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Keyless Module Mercedes W205 W213 C253 ECU Door Lock Control Unit A2229004213

-5%

Part no. A2229004213

Keyless Module Mercedes W205 W213 C253 ECU Door Lock Control Unit A2229004213

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. 6929556

BMW E65 E66 Driver's Seat Air Module Sensor Control Unit Module 6929556

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0075420418

Yaw Module Mercedes W204 Rotation Rate Acceleration Sensor A0075420418

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 3455306

Mini R57 Cabrio Convertible DWA Alarm System Relay ECU 3455306 65753455306

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9146651

BMW X5 X6 E70 E71 Board Monitor Sat Nav System Screen 8,8" 9146651

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6887829

BMW M4 F32 F80 F82 VDC Adaptive Sport Suspension Module Control Unit 6887829

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-8513423

BMW 3 SERIES E90 E91 LCI 316d 318d N47N Engine Wiring Loom Harness DDE 8513423

£23.95

Free delivery: Aug 27

If paid before 14:00

Dashboard Monitor BMW X5 E70 X6 E71 Onboard Display Screen CID 8,8" 9289580

-15%

Part no. 9289580

Dashboard Monitor BMW X5 E70 X6 E71 Onboard Display Screen CID 8,8" 9289580

Promo price

£94.95

£80.71

Part no. 9343210

Radio CD BMW E81 E87 E90 E91 E92 LCI Professional DAB 9243925

£180.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9317175

BMW F20 F21 F30 F31 F32 Body Control Unit Module REM 9317175

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6958526

BMW 5 X5 X6 Series E60 E61 E70 E71 F07 F10 F11 Seat Adjustment Switch Right O/S

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8686893

BMW 3 5 7 F30 LCI G11 G30 Hybrid High Voltage Battery Safety Box 7,6 kWh PHEV

£208.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8X0906259

Audi A1 S1 8X 2.0 TFSI CWZA 231HP Quattro Petrol Engine ECU 8X0906259 Manual

£132.95

Free delivery: Aug 27

If paid before 14:00

Fuel Pump Control Audi TT FV A3 8V Petrol Engine Unit Module 5Q0906093

-5%

Part no. 5Q0906093

Fuel Pump Control Audi TT FV A3 8V Petrol Engine Unit Module 5Q0906093

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-7608170

Mini Cooper S R55 R56 R57 LCI Battery Cable Lead Positive 7608170

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7634058

BMW F20 F30 Engine Automatic Gearbox Module Wiring Cable Loom Harness 7634058

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6956672

BMW E63 E63N LCI Centre Console Switch Centre DTC PDC 6956672

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9350065

Battery Cable BMW F90 M5 F91 M8 G11 G30 Positive Wiring Plus Pole Red 9350065

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 3452093

Mini Cooper R56 Footwell Light Control Unit Module LOW ECU PL3 FRM II 3452093

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9875929

BMW F20 F21 F22 F23 LCI DAB Navigation Head Control Unit Module Business 9875929

£142.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9330952

BMW F12 F13 Air Control Module Control Unit ACSM4 9330952

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8387540

BMW X3 E83 Positive B Battery Terminal Point Case 8387540

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6912244

BMW Z4 E85 Rear Bumper Antenna Mounted Aerial Unit FM 6912244

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6970890

BMW E65 E66 E67 Sensor B-pillar Air Module Left N/S 6970890

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9344677

BMW 2 3 Series F22 F80 M3 F82 M4 Wiring Loom Harness Rear Trunk Lid 9344677

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8798189-1

Basic Head Unit BMW F45 X1 F48 Mini F55 F56 Sat Navigation Radio Stereo 8798189

£180.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-9209796

Head-Up Display BMW F10 F11 Hud Trim Panel Cover Frame Dash Screen 9192921

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9283247-1

BMW X1 E84 Radio Stereo CD Player Navigation Nav Head Unit 9283247

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9257093

Mini Navigation Head Unit R55 R56 R57 LCI R60 R61 CHAMP 2 Sat Nav DAB 9257093

£104.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049000902-1

Fuse Box Mercedes W204 Rear SAM Relay Fuse Box Control Module A2049000902

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6970086

BMW 5 6 Series E60 E61 E63 LCI Cable Set Start / Stop Switch Wiring Loom 6970087

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229005914

Mercedes W205 Rear SAM Module Control Unit A2229005914

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8512047

BMW E90 E91 LCI N47N 320d ed ECU KIT DDE CAS 3 Key 8512047 Manual

£123.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4F0907279D

Audi Q7 4L Comfort Control Module Unit ECU 4F0907279D

£47.95

Free delivery: Aug 27

If paid before 14:00

Audi S6 C6 Steering Wheel Multifunction Wiring Loom 4F0971589A

-15%

Part no. 4F0971589A

Audi S6 C6 Steering Wheel Multifunction Wiring Loom 4F0971589A

Promo price

£18.95

£16.11

Free delivery: Aug 27

If paid before 14:00

Part no. 6870539

BMW F10 F11 F12 F13 Parking AID Control Module ECU 6870539

£75.95

Free delivery: Aug 27

If paid before 14:00

Mercedes A C E Class 1 W169 W203 W211 OBD Diagnostic Plug Cover A2025402373

-5%

Part no. A2025402373-1

Mercedes A C E Class 1 W169 W203 W211 OBD Diagnostic Plug Cover A2025402373

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. 8699955

Engine Control Unit BMW F20 F21 F22 118i 218i B38 136HP ECU DME 8699955 Manual

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8699946-1

Mini Cooper F56 B38 1.5 136HP Petrol Engine ECU Kit DME 8699946 BDC + Key + Lock

£184.95

Free delivery: Aug 27

If paid before 14:00

Volkswagen Tiguan 5N Engine Bay Fuse Relay Box Terminal 3C0937125A

-5%

Part no. 3C0937125A

Volkswagen Tiguan 5N Engine Bay Fuse Relay Box Terminal 3C0937125A

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. 8600124-4

Mini R56 LCI R60 N16 98HP Petrol Engine Control Unit ECU DME 8600124 CAS3 Key

£189.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 6986980

BMW Z4 Series E85 Cable Loom Driver's Door Wiring Harness 6986980 6986976

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9322690

BMW F32 F82 M4 Hifi Audio Sound System Speaker AMP Amplifier Module 9322690

£127.95

Free delivery: Aug 27

If paid before 14:00

Door Module W205 Rear Right O/S Door Control Unit Module A2059004721

-15%

Part no. A2059004721

Door Module W205 Rear Right O/S Door Control Unit Module A2059004721

Promo price

£23.95

£20.36

Free delivery: Aug 27

If paid before 14:00

BMW X5 Series E70 Flat Cable Wiring Wire CAS Start Stop 6950093

-5%

Part no. 6950093

BMW X5 Series E70 Flat Cable Wiring Wire CAS Start Stop 6950093

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-7572358

BMW 3 Series E90 E91 320i N46 Wiring Loom Harness Engine Gearbox Module 7572358

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8625068-3

Mini One R56 LCI R60 N16 98HP Engine ECU Kit DME 8625068 CAS 3 + Key Automatic

£208.95

Free delivery: Aug 27

If paid before 14:00

Mini One F55 F56 Cable Electric Automatic Hold Brake Handbrake 9317092

-5%

Part no. 9317092

Mini One F55 F56 Cable Electric Automatic Hold Brake Handbrake 9317092

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. 9350003-1

Safety Control Unit BMW F01 LCI F07 F10 F11 F25 Air Module Bag ECU 9350003

£18.95

Free delivery: Aug 27

If paid before 14:00

Parking Brake Module Mercedes W176 W231 W246 Electric Control Unit A2469003417

-5%

Part no. A2469003417

Parking Brake Module Mercedes W176 W231 W246 Electric Control Unit A2469003417

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. 8T2035195C

Audi A4 B8 Radio Player Symphony Head Unit CD Player Stereo 8T2035195C

£61.95

Free delivery: Aug 27

If paid before 14:00

VW Volkswagen New Beetle Fan Control Module Relay 1J0919506K

-5%

Part no. 1J0919506K

VW Volkswagen New Beetle Fan Control Module Relay 1J0919506K

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. 6945387

BMW X3 X5 Series E53 E83 E87 Hands-free Electronics Charging Module MULF 6945387

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6975044

BMW Mini Cooper One R50 Cable Wiring Loom Door Front Left N/S 6962777

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2045458201

Mercedes W204 Rear Fuse Box Relay SAM Control Unit Module A2045458201

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9227179-1

BMW 1 Series E87 Body Control Module ECU L2 PL2RR JBBFE Junction Box 9227179

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6519007003

Mercedes W176 A200 CDI OM651 136HP Engine Module ECU Unit A6519007003 Automatic

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469008510

Body Control Module Mercedes W117 W176 W242 W246 Fuse Box Sam A2469008510

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5A5D3C0

Keyless Entry BMW F40 G20 G21 G30 G31 Comfort Access Antenna 5A5D3C0

£13.95

Free delivery: Aug 27

If paid before 14:00

Audi A5 8T Onboard Comfort Supply BCM Control Module Unit ECU 8K0907063DD

-15%

Part no. 8K0907063DD

Audi A5 8T Onboard Comfort Supply BCM Control Module Unit ECU 8K0907063DD

Promo price

£18.95

£16.11

Free delivery: Aug 27

If paid before 14:00

Seat Control Module Mercedes A207 W207 Cabrio Rear Control Unit ECU A2078202910

-5%

Part no. A2078202910

Seat Control Module Mercedes A207 W207 Cabrio Rear Control Unit ECU A2078202910

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. A2118700110

Mercedes W219 Hood Bonnet Light Solar Sensor Module A2118700110

£13.95

Free delivery: Aug 27

If paid before 14:00

Mercedes W205 Centre Console Wiring Harness Cable Loom A2055401924

-5%

Part no. A2055401924

Mercedes W205 Centre Console Wiring Harness Cable Loom A2055401924

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-8T2820043AD

Air Condition Control Audi A4 B8 A5 8T Climate Module Heater Unit 8T2820043AD

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7592508

BMW X5 E70 E90 LCI F20 Engine Wiring N55 Valvetronic Servomotor Cable 7592508

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A4155402408

Door Wiring Mercedes W415 Citan Cable Front Left N/S Harness Loom 241257541R

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9461797

BMW F90 M5 G01 G11 G30 KaFAS Camera Speed Control ECU Module Unit 9461797

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8P4971687R

Audi A3 8P Door Harness Loom Cable Wiring Rear Right O/S 8E0971687L

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-9188741

BMW X5 X6 Series E70 E71 Cable Loom Wiring Set Seat Driver's Side 9188741

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2045457001

SAM Module Mercedes W204 Control Unit Electrical Fuse Box Unit A2045457001

£75.95

Free delivery: Aug 27

If paid before 14:00

Positive Cable Mercedes W176 W246 Battery Lead Plus Pole Red A2465406607

-15%

Part no. A2465406607

Positive Cable Mercedes W176 W246 Battery Lead Plus Pole Red A2465406607

Promo price

£23.95

£20.36

Free delivery: Aug 27

If paid before 14:00

Part no. 2753025

Mini Cooper R55 R56 R57 R58 Wiring Heated Seat Loom 2753025

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1729001506

Mercedes R172 Convertible Roof Control Module ECU A1729001506

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8573116

BMW 5 Series F10 F11 LCI B47 Cable Alternator Starter 8573116

£18.95

Free delivery: Aug 27

If paid before 14:00

Mercedes-Benz Vito W639 Fuse Box Cover Cap Trim A6395450203

-5%

Part no. A6395450203

Mercedes-Benz Vito W639 Fuse Box Cover Cap Trim A6395450203

Promo price

£13.95

£13.25

Free delivery: Aug 27

If paid before 14:00

Part no. A2115455301

Fuse Box Mercedes W211 Rear Trunk Module Relay Fuse Box SAM A2115455301

£32.95

Free delivery: Aug 27

If paid before 14:00

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