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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Mercedes W212 Negative Cable Battery Terminal Wiring 13720856

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9395171

BMW F20 F21 F22 F30 F31 F32 F36 FEM Control Module Unit 9395171

£80.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4F1941824A

Audi A5 F5 Fuse Box Control Module Connector Plug Socket Wiring Loom 4F1941824A

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9294912

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

£522.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 5Q0907686B

Volkswagen Golf R 5G Blind Spot Control Module Unit ECU 5Q0907686B

£94.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 03C906026F

Seat Ibiza Mk4 1.4 TSI CTJB 150HP Engine Control Unit ECU 03C906026F Automatic

£118.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 4F9035225AA

Audi A6 C6 Antenna Amplifier Control Unit Module 4F9035225AA

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. rhd-8511876

Engine Wiring BMW E70 LCI E71 30dX N57 Module Loom Harness Cables 8511876

£56.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4K1919605H

Audi A6 C7 A7 C8 Multifunction Dashboard LCD Screen Display Monitor 4K1919605F

£645.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1695453740

Mercedes-Benz A-Class W169 Fuse Box Unit Holder Bracket Frame A1695453740

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A4538605002

Smart Fortwo A453 Front Seat Side Air Module Unit Right O/S A4538605002

£75.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4G0959754DD

Audi S7 4G Remote Key Radio Alarm Key Fob Opener Button 4G0959754DD

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7P5035225M

Porsche Cayenne 92A Antenna Aerial Amplifier Module Control Unit 7P5035225M

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5H32-19C164-BA

Land Rover Range Rover Sport L320 Radio Sound Amplifier 5H32-19C164-BA XQK500095

£104.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8485064

BMW G20 LCI Starter Motor Positive Battery Cable B48B20A Petrol 8485064G20

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8W0907468J

Audi A4 B9 Gateway Control Unit Module ECU 8W0907468J

£284.95

Part no. A1635400534

Mercedes-Benz M ML W163 Front Left Right Door Wiring Loom Harness A1635400534

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8J0945095C-1

Audi TT 8J Rear Tail Lamp Light Wiring Harness Cable Plug Left N/S 8J0945095C

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 431951253D

Audi TT 8N Relay Unit Module 431951253D

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4L0971030J

Audi Q7 4L Door Card Wiring Harness Cable Loom Front Passenger Side 4L0971030J

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. EH22-7H417-AA

Land Rover Discovery 4 L319 Transfer Case Control Module ECU EH22-7H417-AA

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2129006101-1

TV Tuner Mercedes W204 C207 W212 C218 Digital Video Control Module A2129006101

£170.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-5Q2971111CD

Seat Leon Mk3 5F Steering Rack Wiring Loom Harness Cable 5Q2971111CD

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. JPLA-13E758-AA

Range Rover Sport L494 Door Harness Wire Front Left Right N/O/S JPLA-13E758-AA

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8519663-20

Mini Cooper R60 Cooper SD ALL4 N47N 2.0 ECU Kit DDE 8519663 CAS3 Key Manual

£94.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8583423-9

Mini R60 Cooper SD N47N 143HP Engine ECU Kit DDE CAS3 + Key 8583423 Manual

£132.95

Free delivery: Aug 28

If paid before 14:00

Part no. A0009050038

Mercedes W212 Multi-Purpose Windscreen Camera Control Unit Module A0009050038

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1695456332-1

Control Unit Mercedes W169 W245 SAM Module Relay Fuse Box A1695456332

£32.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5Q0937086Q

Skoda Octavia Mk3 III 5E Body Control Comfort Module Unit 5Q0937086Q

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2065403645

Mercedes W206 Front Door Wiring Harness Cable Left Right N/O/S A2065403645

£85.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8V4971693B

Audi A3 RS3 8V Rear Door Wiring Loom Harness Left Right N/O/S 8V4971693B

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2139004911

Mercedes W213 PDC Module Parking Assistant Parktronic Unit A2139004911

£123.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2128203515-1

Media Connector Cable Mercedes W204 W212 Audio Wire A2128203515

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A6461505572-1

Mercedes W211 E220CDI OM646.821 170HP Engine ECU Kit A6461505572 Automatic

£189.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8W0907777L

Audi RS5 F5 Chassis Module Control Unit 8W0907777L

£265.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A2229005415

Mercedes W205 W213 W222 Comunication Module Telematic Bluetooth A2229005415

£61.95

Free delivery: Aug 28

If paid before 14:00

Part no. 1K0906381

Audi Seat Skoda Volkswagen Relay Multi Use Grey 1K0906381

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-8J2971566B

Audi TT 8J Mk2 Heater Matrix Blower Wiring Loom Harness Cable 8J2971566B

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1729060205-1

Mercedes SLK R172 Rear SAM Fuse Relay Box Control Unit Module A1729060205

£75.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1729007408

Mercedes SLK R172 Player Radio Audio Navi Head Unit CD A1729007408

£189.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A1635400734

Mercedes-Benz M ML W163 Rear Left Right Door Wiring Loom Harness A1635400734

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9367814

BMW 2 X1 X2 F39 F45 F48 Map Card Fuse Box Grouping Diagram 9367814

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2048702751

Mercedes W164 W197 W204 W207 W212 W251 Intake Air Temperature Sensor A2048702751

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8K0907383B

Audi A5 8T Towbar Trailer Hitch Control Module Unit ECU 8K0907383B

£70.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-DK62-14F427-KD

Range Rover L405 Steering Rack Wiring Loom Harness Cable DK62-14F427-KD

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2515400341

Mercedes W251 Negative Earth Battery Cable Wiring Harness Lead A2515400341

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. F1BT18C815GH

Ford Transit Custom Head Unit CD Player Radio Stereo F1BT18C815GH

£75.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9243919-1

BMW E81 E87 E90 E91 E92 LCI Radio Audio CD Professional Bluetooth 9243919

£56.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7L0941824A

Volkswagen Touareg 7L Fuse Box Module Electrical Relay Control Unit 7L0941828A

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7634061

BMW F10 Engine Transmission Module Cable Loom Wiring Harness 7634061

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2048600405

Mercedes W204 Air Module Rear Right O/S Door SRS Control Unit A2048600405

£51.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2129060205

SAM Module Mercedes W207 A207 C207 Rear Control Unit ECU A2129060205

£85.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7612455-4

BMW E90 E91 E92 E93 LCI N53 272HP Engine Control ECU DME Kit 7612455 Manual

£284.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8W0035192K

Audi A4 B9 Multimedia Stereo Sat Nav SD CD Player Radio Head Unit 8W0035192K

£189.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 7353264240E

Fiat Doblo Air Module Control Unit Module 7353264240E

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8K0941824A

Audi A1 A4 A6 A7 A8 Fuse Box Connector Socket Module Unit 8K0941824A

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. EFY500050

Land Rover Discovery L319 Ultrasonic Alarm System Module Control Unit EFY500050

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 3414469

BMW X3 E83 Fuse Grouping Front Stick-on Label Diagram 9267980

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A0009004410

Adblue Module Mercedes W213 C238 Control Unit A0009004410

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9228272

Telematics Module BMW F01 F07 F10 F12 Bluetooth Control Unit ECU 9228272

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. A0009983802

Mercedes-Benz M ML W164 1 Door Cable Harness Wiring Loom Rear Left N/S 13542340

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7M150S

MEKEDE BMW E90 E92 Head Unit Radio Audio Player Android Display Screen 9" 7M150S

£113.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 7597892

BMW X5 E70 X6 E71 Transfer Box Control Unit Module ECU 7597892

£132.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8S0035020B

Audi TT 8S FV Audio Multimedia Radio CD Player MIB2 Head Unit 8S0035020B

£474.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8512292

BMW E90 E91 LCI N47N 318d 143HP Engine Control Unit ECU DDE 8510832 Manual

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-3G2971557B

Volkswagen Passat B8 Door Wiring Loom Front Left N/S 3G2971557B

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7607454

Battery Insert BMW F13 F12 F06 Battery Crashpad Foam Insulator 7607454

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A6519002803-4

Mercedes W447 114 CDI OM651.950 136HP Engine Unit ECU Kit A6519002803 Automatic

£332.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-8M5T-14K733-ULA

Ford Focus Mk2 Engine Bay Under Bonnet Fuse Box Wiring Petrol 8M5T-14K733-ULA

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2319055301-1

Mercedes SL R231 Front Bumper Pedestrian Protection Pressure Sensor A2319055301

£85.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1679008406

Mercedes W167 W177 W247 Ignition Engine Control Unit Module A1679008406

£142.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8859307

BMW X1 U11 Control Module Unit ECU 8859307

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5M0907357F

VW Volkswagen Passat B7 Headlight Range Control Unit Module ECU 5M0907357F

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2219002704

Mercedes CL C216 ABC Suspension Module Control Unit ECU CL63 A2219002704

£189.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1185404715

Mercedes C118 X118 Front Door Wiring Harness Cable Driver Side A1185404715

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2129000204

Mercedes W212 Fuse Box Control Unit SAM Module Relay A2129000204

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8T0907468D

Audi A4 B8 A5 8T Gateway Diagnostic Interface Control Unit Module ECU 8T0907468D

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. AV61-12A650-BNA

Ford C-Max Mk2 Engine Control ECU 1.6 TDCi T1DA 115HP AV61-12A650-BNA Manual

£94.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A6429004201

Mercedes W221 BlueTec Exhaust Gas Aftertreatment Control Unit Module A6429004201

£123.95

Free delivery: Aug 28

If paid before 14:00

Part no. CK52-14603-NB

Range Rover L405 Rear Wiring Loom Harness Rubber Grommet CK52-14603-NB

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-LR046800

Range Rover L405 Power Steering Rack Wiring Harness Loom Cable CK52-14F427-HE

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4G0035056D

Audi A4 B8 Sat Nav Multimedia DAB Radio Control Head Unit 4G0035056D

£189.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2135409716

Mercedes W205 W213 OM654 Alternator Starter Wiring Harness Loom A2135409716

£94.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8387135

BMW 5 7 Series E60 E61 E65 Fuse Box Power Distributor Cap Trim Cover 8387135

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-5E8971120EB

Skoda Octavia VRS Door Wire Wiring Harness Driver Front Right O/S 5E8971120EB

£66.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8589145-19

BMW F36 190 HP 420d B47 Engine Control Unit ECU KIT Diesel 8589145 Automatic

£474.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7848839

BMW F80 F82 F91 F92 Trunk Boot Lid Automatic Smart Openning Sensor 7848839

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. N8B2-14C239-BA

Range Rover Evoque Sport Defender L949 Heater Control Module N8B2-14C239-BA

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8582280-10

BMW F20 F30 F31 118d 318d N47N 143HP Engine Unit ECU DDE Kit 8582280 Manual

£142.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9864916

Mini Countryman F60 Front Door Wiring Harness Cable Loom Left N/S 9864916

£42.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2059001136

Mercedes C238 Vehicle Dynamic Transmission Control Unit Module A2059001136

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. 04L907309R-10

Audi A3 8V 2.0 TDI 150HP DCYA Engine Control ECU Kit 04L907309R Automatic

£118.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8519009-3

BMW X1 E84 20dX Diesel N47N 184HP Engine Control Unit ECU DDE 8519009 Automatic

£75.95

Free delivery: Aug 28

If paid before 14:00

Part no. A0045450201

Mercedes Sprinter W906 Fuse Prefuse Box Relay Electrical Unit A0045450201

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2044400605

Mercedes W204 Wiring Loom Cable Harness Door Front Left N/S A2044400605

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2135402405

Mercedes W213 Brake Wear Indicator Wiring Harness Front Right O/S A2135402405

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A4475400600

Mercedes Vito W447 Battery Cable Alternator Wiring Diesel OM651 A4475400600

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7C0971067D

Volkswagen Crafter TR Parking Assist Wiring Harness Adapter Cable 7C0971067D

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2218702987

Seat Module Mercedes W211 Rear Seat Control Unit Module A2218702987

£18.95

Free delivery: Aug 28

If paid before 14:00

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