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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Ford Galaxy Mk2 Windscreen Front Window Rain Sensor Bosch 6G9N-17D547-AD

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5A693C7

Distribution Box BMW G11 G12 G30 G31 Hybrid Junction Point B+ Rear 5A693C7

£161.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9249462

BMW F07 GT X3 F25 Camera Module Reversing Camera Rear View Control Unit 9249462

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8506374-4

BMW E81 E87 E90 LCI 120d 320d N47 ECU Kit DDE 8506374 CAS3 + Key Automatic

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1728200815

Mercedes W204 C207 Centre Console Aux Port Socket Plug Terminal A1728200815

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6519009702-4

Mercedes W176 A200d 651.930 136HP Engine ECU Kit Ignition + Key A6519009702

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9353423

BMW F06 ECU Body Control Module Junction Box PL6 JBBFEIII 9353423

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2128203385

Door Module Mercedes W212 Front Left N/S Door Control Unit A2128203385

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8509910

BMW X3 F25 X4 F26 Engine Electronics Control Unit Box Cover Trim 8509910

£21.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6819652

Map Fuse Box BMW F15 F16 F85 F86 Grouping Diagram Card 6819652

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5QA915181E

Audi Q3 RSQ3 F3 Negative Cable Battery Terminal Wiring Loom 5QA915181E

£80.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8589141-6

BMW F20 F21 LCI B37 116ed 116HP Engine Unit ECU DDE 8589141 Lock CAS4 Key

£455.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 5A4FAA3-2

BMW G30 LCI 530e Front Bumper Pedestrian Protection Shock Crash Sensor 5A4FAA3

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9252125

BMW X3 F25 Control Module Junction Box Electronics LEAR JBBFE III 9252125

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 420919275-IWH

Audi A4 A5 Q7 Rear Bumper PDC Parking Sensor Ibis White - Y9C 420919275

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2055400841

Mercedes W205 Rear Bumper PDC Parking Control Sensor Harness Wiring A2055400841

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2218207289

Mercedes W221 TV Receiver Boot Left TV DVB Digital Analog Tuner A2218207289

£132.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2118703226

Mercedes W245 Bluetooth Control Unit Module Hands Free A2118703226

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6857300

Air Module BMW F01 F02 LCI F10 F11 F13 ICM Crash Control Unit ECU 6857300

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9300859

BMW X5 F15 Fuel Tank Cable SCR AdBlue Unit Adapter Wiring Harness Diesel 9300859

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6868257

Air Module BMW X5 F15 X6 F16 ECU ICM Control Unit 6868257

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6461501177

Mercedes W639 109 CDI OM646.980 95HP Engine Control Unit ECU A6461501177

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5Q0907361G

Seat Leon Mk3 5F Fuse Box Control Unit Module Relay Box 5Q0907361G

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6966551

BMW 5 Series E60 E61 Front Door Wiring Loom Harness Passengers Side 6966549

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8518477-3

BMW X3 F25 20dX 184HP N47N Engine Unit ECU Kit DDE 8518477 Key CAS4 Automatic

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 2197568

Ford Fiesta Mk7 Starter Motor 1.0 Petrol Engine CV6T-11000-GE

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8578504

BMW F30 LCI 335dX N57Z Engine Gearbox Module Wiring Cable Loom Harness 8578504

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2158200611

Mercedes W164 W649 W906 Bluetooth Hands Free Mobile Phone Adapter A2158200611

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4H0919604H-2

Audi A8 4H Head Up Display Hud Project Screen Control Unit Module 4H0919604G

£137.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 3457428-2

BMW Mini Cooper R56 Footwell Light Module High EKS ECU LEAR PL3 FRM3R 3457428

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. GK2T-14B321-AC

Ford Transit Custom Air Module Control Unit ECU GK2T-14B321-AC

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7624617-1

BMW F20 F21 F30 F31 F32 Cable Alternator Starter Base B 7624617

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4L0907335

Audi Q7 4L Quattro S Line Keyless Entry Antenna Control Module 4L0907335

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8583091

BMW X5 E70 G11 Integrated Supply Module Ecu Control Unit 8583091

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8574752-1

BMW F25 20dX B47 190HP Engine Unit ECU Kit DDE 8574752 CAS4 Key Automatic

£332.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8642682

BMW 3 Series F30 LCI 330e Negative Earth Cable High Voltage Battery 8642682

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 83A035382A

Audi RSQ3 F3 Boot Trunk Subwoofer Rear Bass Speaker 83A035382A

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1779006003

SRS Module Mercedes W177 Safety Belt Tensioner Airbag Control A1779006003

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8691838-1

Mini F54 F55 F57 B48 136HP Petrol Engine Control ECU Kit DME 8674258 Manual

£237.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 702500

Citroen Relay Peugeot Boxer III Iveco Daily Relay MOPAR 12V 30A 702500

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2215402462

Mercedes W221 SAM Fuse Box Comfort Control Module Unit ECU A2215402462

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8507136-1

BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8507136 CAS3 + Key

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6822094

Mini F54 F55 F56 F57 Radio Sat Nav DAB Basic Media Player Head Unit 6822094

£161.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 6868254

BMW F33 ECU ICM Control Sensor Unit Air Module ECU 6868254

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6960428

BMW 3 5 6 Series E60 E61 E63 E64 E90 E91 FBAS Analog Video Module Unit 6960428

£127.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-5A2DA15

BMW F40 Power Steering Rack Wiring Harness Loom Cable 5A2DA15

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9259466

BMW 1 3 4 Series F20 F21 F30 F31 F32 Power Distribution Fuse Box Rear

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9079051202

Mercedes Sprinter W907 Battery Wire Negative Lead Cable A9079051202

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9122100

BMW 1 Series E88 Mini Cooper R57 R59 Sat Nav GPS Antenna Amplifier 9122100

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9337233

BMW F32 F33 F82 F83 M4 Door Wiring Front Harness Loom Cable 9337233

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2139004409

Mercedes W213 Door Module Front Right O/S Control Unit A2139004409

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4E0941817B

Audi A6 A8 D4 Q7 4M CAN Bus Jumper Contact Bridge Connector Plug 4E0941817B

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6863389

BMW F20 F21 F30 F31 ECU ICM Plus Control Unit Module Airbag 6863389

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9064407353

VW Crafter I Mercedes Sprinter W906 Fuel Tank Wiring Loom Cable A9064407353

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1812480

Ford Focus Mk3 Seat Air Module Sensor Front Passenger Side BM51-A625B02-AC

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2829003300

Mercedes W177 A200 163HP M282.914 Engine Control Unit ECU A2829003300 Automatic

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6421509478

Mercedes ML W164 OM642 Diesel Engine Control Unit Module ECU A6421509478

£85.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8V0863051

Audi A3 8V AMP Amplifier Under Seat Cover Trim Panel Unit 8V0863051

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049012604

Mercedes W204 Parking Control Unit Module ECU A2049012604

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7621178-5

BMW E81 E87 LCI E90 N43 118i 318i Engine Control ECU DME Kit 7621178 Automatic

£313.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 7599881-20

BMW E87 LCI E90 120i 320i Petrol N43 170HP ECU KIT DME 7599881 CAS3 Key Manual

£123.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4RA007813

Relay Mercedes W204 4-Pin Electrical Relay Black Hella 12V 4RA007813

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. RVH000095

Land Rover Discovery 3 L319 Relief Suspension Valve Block Control RVH000095

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6948048

BMW Z4 E85 Front Door Wiring Loom Cable Right O/S Harness 6948048

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8X0971845C

Audi A1 8X Fuse Box Relay Control Unit Module Bracket Holder 8X0971845C

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2045420423

Mercedes W204 PDC Parktronic Parking Sensor Display Warning Rear A2045420423

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5QA919294C

Audi Seat Skoda Volkswagen PDC Parking Sensor Control Unit Module 5QA919294C

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8510221-10

BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8510221 CAS3 + Key

£113.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2118705426

Rain Sensor Mercedes W211 C219 Front Windscreen Control Unit A2118705426

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229003210

Mercedes W205 Head Unit Audio Player Radio Sat Nav Module A2229003210

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2709002100-10

Mercedes C117 W176 45 AMG 133.980 Engine Control Unit ECU A2709002100 Automatic

£113.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1669003208

Mercedes ML W166 SAM Control Unit Rear Fuse Module A1669003208

£104.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 2K5971691

VW Volkswagen Caddy 2K Sliding Door Wiring Loom Harness Cable Left N/S 2K5971691

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4H0907401-1

Audi A8 4H 3.0 TDI CDTA 250HP Quattro Engine ECU Kit 4H0907401 BCM + Key + Lock

£313.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 4M1959595D

Audi A6 C8 A7 4K Door Control Module ECU Rear Left Right N/O/S 4M1959595D

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9137803

MINI Cooper R55 R56 R57 R58 R59 Drivers Door Wiring Cable 9137803

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7640004-3

Mini Cooper R56 Engine N12 1.6 120HP Petrol ECU Kit DME 7640004 CAS3 Key Manual

£142.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 9212176

Door Cable BMW F01 F02 Front Right O/S Wiring Loom Harness 9212176

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9192666

BMW F01 F10 F11 Cover Positive B Battery Terminal Point Case 9192666

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7792938

Land Rover Freelander L314 M47 2.0 Diesel Engine Unit ECU Automatic 7792938

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0005454616

Mercedes W204 Automatic Gearbox Transmission EGS Module Unit ECU A0005454616

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229005613

Rear View Camera Module Mercedes W205 W222 W253 Control Unit A2229005613

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K5907115

Audi A4 B8 A5 8T 2.0 TFSI CDNC Quattro 211HP Engine Control Unit ECU 8K5907115

£199.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5Q0959392E

Audi A3 8V Front Door Module Unit ECU Left N/S Passenger Side 5Q0959392E

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9267468

Body Control Module BMW F11 ECU Junction Box 3 PL6 JBBFE III V7 9267468

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5A34C94

BMW X1 F48 Catalytic Reduction System Module Unit 13264014

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6461502572

Mercedes W204 C200CDI OM646 Engine Control Unit Module ECU A6461502572

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229004619

Mercedes W205 W213 C238 Bluetooth Hermes LTE Control Unit Module A2139002210

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7557395-19

MINI Cooper S R52 R53 W11 170HP Engine ECU Kit DME 7557395 EWS Keys Automatic

£113.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2118203226

Mercedes E-Class W211 S211 Bi-Xenon Headlight Level Control Unit Module LWR

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8X0915459

Audi A1 8X Positive Battery Overload Protection 8X0915459

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9179595

BMW X3 E83 Board Monitor Central Information Display Screen 6,5" 9179595

£180.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8M5T-19G481-AG

Ford Focus Mk2 Kuga Mk1 Body Comfort Keyless Control Module Unit 8M5T-19G481-AG

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8512498-4

BMW E84 E90 LCI 20dX 320xd N47 177HP ECU Kit DDE 8512498 CAS3 + Key Manual

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9876796

Telematics Module Mini F55 LCI 4g Bluetooth Control Module Unit Ecu 9876796

£51.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9309997

Mini F57 Cabrio Aerial Base Antenna Rod Unit AM / FM / TEL / GPS / DAB-L 9309997

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4H0919275-SDA

Skoda Octavia 1Z PDC Parking Sensor 4H0919275 Anthracite Grey Metallic - F8J

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9231466

BMW 2 3 4 Series F22 F30 F32 Antenna Amplifier Module Trap Circuit 9231466

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8506199-2

BMW E60 E61 LCI 520d N47 Diesel Engine ECU Kit DDE CAS3 + Key 8506199

£142.95

Free delivery: Aug 27

If paid before 14:00

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