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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Head-Up Display BMW X5 E70 HUD Dashboard Screen Control Unit Module 9210852

£85.95

Free delivery: Aug 27

If paid before 14:00

Part no. 30422-ELC-60010-AA

Mercedes Vito W639 Control Unit Taxi Intercom Module ECU 30422-ELC-60010-AA

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. BK2T-18D815-GF

Ford Transit Custom Radio Stereo Audio USB Head Unit Panel BK2T-18D815-GF

£51.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9270355

Fuse Carrier BMW F40 Mini F55 F56 F57 F60 Distribution Box 9270355

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2044400239

Mercedes W204 W207 Cable Wiring Power Steering Rack Loom Harness A2044400239

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5Q0955559C

Volkswagen Golf 8 Rain Sensor Front Windscreen 5Q0955559C

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8V4T-14B006-AA

Ford Focus Mk3 Control Unit Crash Impact Sensor Air Module 8V4T-14B006-AA

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0035420419

Mercedes W177 W205 W247 Relay Fuse Unit Module 4 Pins Black A0035420419

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6511500126-1

Mercedes W204 C200CDI BlueEFFICIENCY OM651.913 Engine ECU Kit A6511500126 Key

£123.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2078201989

Mercedes-Benz W207 A207 Radio Aerial Antenna Amplifier Module Unit A2078201989

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 07K907309F

Audi RSQ3 F3 2.5 TFSI Quattro 400HP DNWA Engine Unit ECU 07K907309F Automatic

£275.95

Free delivery: Aug 27

If paid before 14:00

Part no. 90147413

Headlight Module BMW F40 LED Headlamp Inverter Converter Control Unit 90147413

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2429004801

Mercedes W176 W204 W212 Telematics Communication Control Unit Module A2429004801

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009054807-2

Mercedes W118 W177 W206 W247 NOX Sensor Electronics Module A0009054807

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229003011

Mercedes GLC C253 X253 Camera Lane Assist Control ECU Module Unit A2229003011

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2038700326

Mercedes CLC CL203 Front Left N/S Door Control Module Unit A2038700126

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8R0035223G

Speaker Amplifier Audi A4 B8 A5 8T Stereo Radio Sound System Amp 8R0035223G

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. F1ET-14B532-BE

Ford Focus Mk3 Kuga Mk2 Rear Door Control Module Left Right N/O/S F1ET-14B532-BE

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7130344

BMW F07 Plug Bumper Front Trim Dummy Plug Right O/S GT Gran Turismo 7130344

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5N0971235A

Audi A3 8P VW Golf MK6 Battery Negative Earth Cable Harness Wiring 5N0971235A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K0959794A

Audi A4 B8 Door Module Rear Right O/S Control Unit Module ECU 8K0959794A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2135409916

Earth Ground Cable Mercedes W213 S213 Battery Wiring Loom Engine A2135409916

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0025422319

Mercedes-Benz Universal HELLA Relay Module 12V 4RA 940 010 A0025422319

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9G9T-14B534-BB

Ford Mondeo Mk4 Door Window Control Rear Left Right N/O/S 9G9T-14B534-BB

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0131540902

Mercedes ML W164 W221 W251 OM642 CDI Altenator Generator 14V 220A A0131540902

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2055400436

Door Wiring Mercedes C205 Front Right O/S Door Harness Loom A2055400436

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2218204515

Mercedes W221 Universal Handy Interface UHI Adapter Wiring Harness A2218204515

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9270354

Mini F54 F55 F56 F57 F60 Rear Electric Power Distribution Fuse Box 9270354

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6401500734-1

Mercedes W169 W245 A200 B200 CDI OM640.941 140HP Engine ECU Kit Key A6401500734

£123.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7N0843638

Volkswagen Sharan 7N Sliding Door Catch Upper Locking Plate Right O/S 7N0843638

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 06K907425B-13

Volkswagen Golf VII R 2.0TSI CJXC 300HP Engine Control ECU Kit 06K907425B Manual

£237.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2129063001-1

Radio Head Unit Mercedes W212 Command Navi CD DVD Player Navigation A2129063001m

£132.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 390306

BMW Navigation Road Map 2004-2 Europe Professional Navteq 0390306

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9079004707

Mercedes W907 Air Suspension Level Control Unit Module Airmatic A9079004707

£170.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6519007500-3

Mercedes W204 C220CDI BlueEFFICIENCY OM651.911 Engine ECU Kit A6519007500 Key

£265.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8519005-1

BMW X1 E84 18dX Diesel N47N Engine Control Unit ECU Kit DDE 8519005 CAS3 Key

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9266328

ICM Module BMW F07 GT F01 F02 F03 F04 Air Module Control Unit ECU 9266328

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-LR077406

Land Rover Discovery L319 4 Negative Battery Cable Wiring EH22-14301-JE

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8T0907468K

Gateway Interface Audi A5 8T A4 B8 Control Unit Module ECU 8T0907468K

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6791131

BMW F01 ICM Module Integrated Chassis Management QL ES Control Unit 6791131

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009005602

Mercedes W204 W212 Control Unit AMG Drive Select Module ECU A0009005602

£61.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009005517

Mercedes W177 W205 W238 W257 Gearbox Control Unit Module ECU A0009005517

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1T0907539C

Volkswagen Touran 1T Dashboard Solar Sun Sensor 1T0907539C

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1Z0971161M

Skoda Octavia 2 Door Harness Loom Cable Wiring Rear Left Right N/O/S 1Z0971161M

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0018276804

Mercedes W207 Connection Media Interface Cable iPod Wiring Lead A0018276804

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8J0057186Q

Audi TT 8J Radio Head Unit CD Audio Player Control Unit 8J0035186Q

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8507245-1

BMW E81 E82 E87 LCI E88 123d Engine N47S ECU Kit DDE 8507245 CAS3 + Key Manual

£142.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9226901

Body Control Module BMW F01 ECU Junction Box PL6 JBBFE III 3 Lear 9226901

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8519663-14

Mini Cooper D R56 LCI R60 N47N 112HP Diesel Engine Unit ECU DDE 8519663 Manual

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2059009527

Mercedes W205 Air Module ICM SRS Control Unit ECU A2059009527

£33.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9124583-KAS

BMW E87 E90 Front Rear PDC Ultrasonic Parking Sensor Kaschmir Silver A72 9124583

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9130157

BMW X6 Series E71 Aerial Antenna Amplifier Diversity 868 MHZ 9130157

£62.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5WA937548A

VW Volkswagen Golf 8 1.0 TSI DLAA HV Battery Positive Terminal Clamp 5WA937548A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6G9T-14B192-DA

Ford Galaxy Mondeo Transit Relay 4-Pin Black FoMoCo Unit 6G9T-14B192-DA

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6Q0035152E

Radio CD Player VW Volkswagen Polo 9N Head Unit Audio Player 6Q0035152E

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8P0862335K

Bluetooth Interface Audi TT 8J A3 8P Multimedia Steuergerät ECU 8P0862335K

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8649869

BMW F30 LCI 330e Hybrid HV Accumulator Battery Positive Cable Wiring 8649869

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5K0035730D

VW Volkswagen Golf VI 6 Bluetooth Interface Control Module Unit ECU 5K0035730D

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7928660

BMW G30 Radio Audio Remote Receiver Control Module Unit 7928660

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-8Y2971029H

Audi A3 8Y Front Door Wiring Loom Harness Cable Passenger's Side 8Y2971029H

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009008718

Climate Control Module Mercedes W205 W213 Air Conditioning A/C Unit A0009008718

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6911584

BMW E65 E66 Steering Wheel MFL Phone Switch Buttons Left N/S 6911584

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2048705326

Mercedes W204 Universal Media Interface Control Unit Module A2048705326

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7561834-21

BMW E85 E87 E90 120i 320i N46 150HP Engine ECU DME 7561834 Manual

£142.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8638785

Mini Cooper F56 136HP Petrol B38 Engine Control ECU DME 8638785 Manual

£132.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5K0907539A

Volkswagen Golf Gti 5k Sun Detection Sunlight Sensor Module Unit 5K0907539A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4E0910552G

Audi S8 D3 5.2 FSI 450HP BSM Quattro Engine Unit ECU 4E0910552G Automatic

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6856980

BMW F01 F10 F11 F30 F31 AHK Towing Hitch Tow Bar Control Module Unit ECU 6856980

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2048700196-2

Radio Player Mercedes W204 COMAND Navi CD Head Unit A2048700196

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2115455232

Mercedes W211 Front Fuse Box SAM SRB Module Relay Control Unit A2115455232

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9069820109-1

Mercedes W907 Positive Battery Terminal Cover Cap Trim Red A9069820109

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9079051602

Mercedes W907 Aerial Antenna Amplifier Control Unit Module A9079051602

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6R0971537F

VW Volkswagen Polo 6R Negative Battery Terminal Cable Wiring 6R0971537F

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049005510

Mercedes W204 Navigation CD Player COMAND Radio Sat Nav Head Unit A2049005510

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6549001400-1

Mercedes W213 E220 CDI 654.920 194HP Engine ECU Kit A6549001400 Automatic

£379.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A9079053907

Mercedes Sprinter W907 W910 Battery Sensor Cable Negative Terminal A9079053907

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8368231

BMW E46 Door Speaker Tweeter Front Left N/S 8368231

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4H0959792S

Porsche Macan 95B Front Door Control Module Unit Passenger Side 4H0959792S

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6R0971235C

VW Volkswagen Polo 6R Negative Battery Terminal Cable Wiring 6C0971235A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4K0919390B

Audi A6 C8 Door Panel LED Module Light Unit Front Right O/S 4K0919390B

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8H22-10F845-AA

Land Rover Range Rover L322 Bluetooth Phone ECU Control Module 8H22-10F845-AA

£89.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-83A971030QL

Audi RSQ3 F3 Front Door Wiring Harness Loom Cable Left N/S 83A971030QL

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6841603-1

Radio CD Player Mini F54 F55 F56 F60 Media Head Unit Alpine 6841603

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 03L906018SJ

Audi A4 B8 A5 8T 2.0 TDI CJCD 150HP Engine Control Unit ECU 03L906018SJ Manual

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2749000800-1

Mercedes W205 C200 274.920 184HP Engine ECU Kit A2749000800 Key Lock Automatic

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6866397

BMW F20 VDC Dynamic Adaptive Suspension System Control Unit Module ECU 6866397

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4L0035223J

Audi Q7 4L Amplifier BOSE Premium Audio Sound System Module 4L0035223J

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5H2Z-14B345-BA-1

Land Rover Discovery 4 L319 Air Module Crash Impact Sensor 5H2Z-14B345-BA X2

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5A20558

BMW X2 F39 F45 F46 Automatic Gearbox ECU Control Module EGS Unit 5A20558

£260.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 9277812

BMW 2 Series F23 Convertible Rear Trunk Tailgate Antenna Aerial DAB 9277812

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8576333-3

BMW F20 F30 F32 120dX 320dX 420dX Diesel N47N 184HP ECU Kit DDE 8576333 Key FEM

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0035421019

Relay Mercedes C117 GLA X156 ML W166 W176 W246 5 Pins Yellow A0035421019

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6870277

Air Module BMW X5 F15 X6 F16 ECU ICM Control Unit 6870277

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9217033

Battery Cable BMW F01 F02 Positive Wiring Plus Pole Red 9217033

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5Q0959435C

Audi A3 8V VW Golf Mk7 Kessy Module Keyless Go Entry Control Unit 5Q0959435C

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9078208600-1

Mercedes Sprinter W907 Radio Audio System Control Unit Module A9078208600

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049009301

Mercedes W212 Media Interface Control Unit Module Multimedia A2049009301

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2124406207

Negative Cable Mercedes W212 Battery Earth Wiring Loom A2124406207

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8577625

BMW F20 F21 116d ed N47N Engine Control Unit ECU DDE 8577625 Manual Transmission

£32.95

Free delivery: Aug 27

If paid before 14:00

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