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 F20 F30 120i N13 177HP Engine ECU Kit DME 8625241 FEM Keys Lock Automatic

£474.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 1Z0907539B

Skoda Octavia II Light Sun Solar Sensor Unit 1Z0907539B

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. F60 REAR PDC

Mini F60 Rear Parking Sensor PDC Bumper Wiring Loom Cable Harness Wire

£51.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9253780

Boot Release Switch BMW F01 F02 F10 F11 LCI Auto Tailgate 9253780

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. KK3T-14F642-BA

Ford Transit Custom Data Link Obd Port Module KK3T-14F642-BA

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0018209726

Mercedes-Benz C CLK Class W203 W209 Airbag Control Unit Module ECU A0018209726

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2139000500

Trunk Module Mercedes S205 Automatic Trunk Lid Closing Control Unit A2139000500

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. SP329ZZC

Right Connections Tow Bar Towing Hitch Module CAN Bus Control Unit SP329ZZC

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8606777-2

BMW F30 320iX N20 ECU Kit Engine Control Unit DME 8606777 Key FEM Lock Manual

£474.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8582280

Engine Control ECU BMW F20 F21 116d N47N 116HP DDE 8582280 Manual Transmission

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4G5971029GN

Audi RS6 C7 Front Door Wiring Loom Harness Cable Right O/S 4G5971029GN

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8P0907063

Audi A3 8P Body Control Module BCM Comfort Control Unit 8P0907063

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9149673

BMW 5 Series E60 E61 LCI Alarm System Unit Ultra Sonic Module 9149673

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0008201277

Mercedes-Benz W906 Light Repeater Lamp Wiring Loom A0008201277

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2139008530

Mercedes W213 W447 Transmission Gearbox Control Unit Module ECU A2139008530

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1698207226

Door Module Mercedes W169 W245 Front Right O/S Control Unit A1698207226

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9269896

BMW X3 F25 Business CD Radio Player Head Unit Control 9269896

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6812217

BMW X1 F48 Cable Loom Door Rear Left Right N/O/S Wiring Harness 6840095

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129060905

Mercedes A207 Rear SAM Module Fuse Box Relay Control Unit A2129060905

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9204849

BMW X5 X6 Series E70 E71 Airbag Control Module ECU Unit 9204849

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4E0955559C-1

Audi A6 C6 Front Windscreen Rain Light Solar Sensor Unit 4E0955559C

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4M0907247A

Keyless Entry Amplifier Audi A4 B9 A5 F5 Control Box Module Antenna 4M0907247A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8610484-4

BMW F20 F21 116i F30 316i N13 136HP Engine Unit ECU Kit DME 8610484 Key FEM

£313.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129010700

Mercedes W212 ECU Control Unit Sensor Module Airbag A2129010700

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9367377

BMW F10 520d CAS 4 Car Acess System Control Module Unit ECU CAS4 CG+ELV 9367377

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 06K907425B-20

Volkswagen Golf R 5G MK7 2.0TFSI CJXC 300HP Engine Control ECU 06K907425B Manual

£132.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. rhd-3412569

BMW X3 E83 Front Left Door Passenger Side N/S Wiring Loom Harness Cables 3412569

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1775404910

Cable Wiring Mercedes W177 W247 Fuel Pump Sending Unit Plug Socket A1775404910

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1718206526

Mercedes SLK R171 Air Module System Control Unit ECU A1718206526

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009063701

Mercedes W205 Alternator 14V/200A Valeo Diesel Engine M626 A0009063701

£137.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 9237055

Antenna Diversity BMW F07 GT Control Unit Module Aeral Amplifier 868 MHZ 9237055

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K0959792M

Audi Q5 8R A6 C6 Door Module Front Left N/S Control Unit Module ECU 8K0959792M

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 3456363

Mini R56 LCI R60 Radio MINI CD Player Head Unit Controller 3456363

£184.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8168035-1

BMW E60 Trunk Open Cable Boot Lid Tailgate Release Wiring 8360676

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2218704795

Door Module Mercedes W221 Front Door Right O/S Control Module A2218704795

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7391043

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

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8602994

BMW 1 X1 X2 Series F39 F40 F48 Mini Cooper One F55 F56 Earth Cable Wire 8602994

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8517874-7

BMW F20 F21 116d N47N 116HP ECU Kit DDE 8517874 + Key + FEM + Lock Manual

£113.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4L0907357B

Audi Q7 4L Headlight Level Range Adjustment Module Control Unit 4L0907357B

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8R0907468L

Audi A5 8F Gateway Control Unit Module ECU 8R0907468L

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7581848

BMW E81 E87 LCI E90 116i 316i N45N 116HP Engine ECU Unit DME 7581848 Manual

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2055402992

Mercedes W205 Parking Sensor Wiring Rear Bumper PDC Loom Cable A2055402992

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8H0951178

Audi A4 B7 Cabrio Alarm Signal Body Control Sensor Module Unit 8H0951178

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6401500100

Mercedes W169 A160 CDI OM640.942 82HP Engine Control ECU A6401500100 Automatic

£94.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 9205270

BMW F01 F02 F03 DVD CD Changer Multichanger Alpine 9205270

£104.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9079008703

Mercedes W907 W910 CD Player Audio Stereo Radio Head Unit A9079008703

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1775404507-1

Mercedes V177 C118 W247 Fuse Box Relay Control Unit Module A177540457

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5K0971104B

Volkswagen Golf Mk6 Rear Tailgate Licence Plate Lighting Wiring Cable 5K0971104B

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9159310

BMW F10 Central Sensor LOW 9159310

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009007507

Mercedes W207 Front Camera Line Assistant Control Unit Module A0009007507

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9387234

Mini F55 Fuse Box Front Body Control Module ECU BCM Unit 9387234

£118.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4F0959795N

Door Module Audi A4 B8 A6 C6 Rear Unit Control ECU Left N/S 4F0959795N

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6944499

BMW 5 6 Series E60 E61 E63 Passenger Side Door Airbag Control Module 6944499

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9286219

BMW 3 Series F30 F31 Front Door Wiring Loom Cable Harness 9286219

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7794911

BMW E87 E90 E91 Cable Alternator Starter Base B 7794911

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9436281

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

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8678968

Engine Wiring Mini F56 F60 BMW F45 F46 Petrol Sensor Module 1 Harness 8678968

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4F0959651

Audi A6 C6 Front Impact Sensor Safety Crash Detection Module Unit 4F0959651

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1715451332

Mercedes SLK R171 Parking Distance Aid Sensor Control Unit Module A1715451332

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7843335

BMW F10 M5 F12 M6 Engine Wiring Harness Valvetronic Servomotor Cyl.1-4 7843335

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2055402350

Mercedes A205 W247 Battery Fuse Box Positive Distribution Terminal A2055402350

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8509722

BMW 1 Series F20 F21 F22 F30 F31 F35 Control Unit Box Engine 8509722

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1K0915181F

Audi A3 8P Cabriolet Negative Battery Terminal Cable Lead Wiring 1K0915181F

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1645450303

Mercedes W166 Junction Fuse Block Cover Trim Positive Terminal A1645450303

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9311035

Navigation Head Unit BMW F10 F20 F21 F30 F31 Media Player High 9311035

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2205400282

Mercedes CL S Class C215 W220 Fuse Box Unit Cover Front Left A2205400282

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2075400433

Mercedes W207 Door Cable Wiring Harness Loom Front Left Door N/S A2075400433

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009068206

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

£284.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A1775403131

Mercedes w177 Sensor Wiring Harness Cable Front A1775403131

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2056105402

Mercedes W205 Battery Recess Trunk Floor Battery Box Base Plate A2056105402

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1729000102

Mercedes SLK R172 GPS Navigation System Screen Display A1729000102

£104.95

Free delivery: Aug 27

If paid before 14:00

Part no. A4475401011

Mercedes W447 Horn Signal Wiring Connector Electrical Cable A4475401011

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2118700089

Mercedes W211 Head Unit CD Player Navigation COMAND GPS Unit A2118700089

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2749002900-1

Mercedes X253 GLC 250 M274.920 4-Matic Engine ECU Unit Module A2749002900

£151.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2118205885

Mercedes E-Class S-Class W211 W220 Nokia Phone Control Unit Module ECU

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1688200289

Mercedes W168 Antenna Amplifier Unit Roof Rear Rail A1688200289

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7843349

BMW F10 F11 LCI M5 F06 F13 M6 S63N Cable Alternator Starter Base B+ 7843349

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1729009302

Mercedes W212 W221 Media Interface Control Unit Module A1729009302

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1J0906381B

Audi TT 8N Fuse Box Relay Control Unit Module 1J0906381B

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8579478-1

BMW F20 F30 120dX 320dX N47N 184HP ECU Kit Control Unit DDE 8579478 FEM Key

£161.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9353416

Junction Box BMW F10 PL6 JBBFE III V1 Body Control Module 9353416

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9238195

Fuse Box Grouping BMW F10 F11 F12 Fuse Placement Map Card Diagram 9238195

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5A33FB9

Starter Motor BMW X3 G01 G20 G21 G30 G31 B47 Diesel Engine Valeo 5A33FB9

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2025405981

Mercedes Sprinter W907 W910 Wiring Cable Plug OBD Socket A2025405981 A9070005999

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9139905

Mini Cooper F55 F56 Head Unit Basic Media Navigation Headunit 9139905

£180.95

Free delivery: Aug 27

If paid before 14:00

Part no. 03L906018DT

Audi TT 8J 2.0 TDI 170HP CFGB Quattro Engine ECU Unit 03L906018DT Manual

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9121903

BMW E81 E87 E91 Switch Cluster Steering Column Cruise Control 9121903

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5G0971175B

VW Volkswagen Golf R 7 Rear Tailgate Boot Lid Wiring Adapter Loom 5G0971175B

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. LB5T9G768AB

Ford Transit Mk8 Radar Adaptive Cruise Control Sensor LB5T9G768AB

£170.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6952987

BMW 5 6 Series E60 E61 E63 Driver Side Door Airbag Control Unit Module 6952987

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2535403210

Door Wiring Mercedes X253 Front Right O/S Door Harness Loom A2535403210

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6820464

Mini Cooper F55 F56 Control Unit Module Active Sound Design Amplifier 6820464

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2046190048

Mercedes-Benz C W204 Rear Battery Support Holder Mount Bracket A2046190048

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8518423-1

BMW F20 F30 120d 320d N47N 184HP Engine Unit ECU Kit DDE 8518423 FEM Key Manual

£132.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 4F0959792R

Audi A6 C6 Front Door Left N/S Module Unit Control ECU 4F0959792R

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6519007401-9

Mercedes W212 E250CDI Blue Efficiency OM651.924 204HP Engine ECU A6519007401 Key

£132.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 9248361

Radio Player BMW F10 F11 F20 F21 F25 F30 F31 Alpine CD Champ 2 Head Unit 9248361

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-9808495

Mini Cooper R60 R61 Positive Battery Lead Distribution Box Cable 9808495

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6079001800-1

Mercedes W176 A180 CDI OM607.951 109HP Engine ECU Kit A6079001800 Automatic

£189.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

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