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 G15 G20 G21 G29 Negative Battery Cable Lead ISB Terminal 9442115

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4H0959792H

Audi A8 D4 4H Front Door Control Module Unit ECU Passenger Side 4H0959792H

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8067511

BMW F98 Adapter Cable Wiring RBS Rear Axle 8067511

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2469056103

Mercedes SL R231 W246 Tailgate Rear View Reversing Camera A2469056103

£132.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9284421

BMW F10 F11 Gateway Module ECU Control Unit LEAR ZGW-02 Mid 9284421

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8P0907530

Audi A3 S3 8P Gateway Control Module ECU 8P0907530

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8U0907468Q

Audi Q3 8U Gateway Control Module Unit ECU 8U0907468Q

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8579482-1

BMW F20 F21 116d ed Diesel N47N 116HP ECU Kit DDE 8579482 + Key + FEM Manual

£142.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9664738680-1

Peugeot 308 T7 1.6 5FW 120HP Engine Control Module ECU Kit 9664738680 Manual

£161.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 9333106

BMW Z4 E89 Hifi System Audio Sound Amplifier AMP Module Unit 9333106

£189.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4F0919887M

Audi A5 8T Navigation System Car Sat Nav Computer Head Unit 4F0919887M

£94.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. AH42-18C847-BB

Land Rover Range Rover L322 Aerial Antenna Audio Amplifier Module AH42-18C847-BB

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6809542

Mini F55 Rear Door Wiring Loom Harness Cable 6809542

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5E9035577B

Skoda Octavia 5E Radio Aerial Antenna Amplifier Module 5E9035577B

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4H0907064BN

Audi A6 C7 Saloon CCM Comfort Control Module Onboard Unit ECU 4H0907064BN

£42.95

Free delivery: Aug 28

If paid before 14:00

Part no. YWY000120

Range Rover Sport L320 Alarm Receiver Control Module YWY000120

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8580165

Mini F54 F55 F56 F57 F60 B47 Wiring Harness Engine Glow Plug Module 8580165

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9243626

BMW X3 F25 EPS Control Wiring Harness Loom Cable 9243626

£66.95

Free delivery: Aug 28

If paid before 14:00

Part no. 2622610

Bluetooth Module BMW F10 F20 F23 F30 Teleservices GPS Telematics Control 2622610

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6919420

BMW 3 E93 Cabrio Convertible Rear Lid Holder Cable Support Guide 6919420

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8519663-22

Mini Cooper D R55 R56 R60 N47 112HP Engine ECU Kit DDE CAS 3 Key Lock 8519663

£189.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6G9T-14C507-CB

Ford Mondeo MK4 S-Max MK1 Rear Boot Fuse Box Cover Lid Grey 6G9T-14C507-CB

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8582280-12

BMW F20 F21 116d N47N 117HP Engine Control ECU Kit DDE 8582280 Manual

£237.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8X0951253A

VW Crafter SY Skoda Fabia Mk4 5 Pin Switch Relay 12V Number 655 8X0951253A

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9119707

BMW E81 E87 E90 E91 E92 6-disc CD Changer Without Magazine 9119707

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 2650917

Ford Transit Connect Engine Alternator Generator Unit Diesel KK3T-10300-BB

£94.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8518166

BMW E82 E88 E93 120d 320d N47 177HP Engine Control Unit ECU DDE 8518166 Manual

£118.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A2125406105

Mercedes W212 Rear LED Wiring Cable Harness Loom A2125406105

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 1307329-1

BMW E63 E90 E92 E93 Xenon Headlight Ballast Control Unit Module 1307329135

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. rhd-A2465408211

Door Cable Mercedes W176 W246 Wiring Loom Front Left Door N/S A2465408211

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8E1971035AH

Audi A4 B7 Front Door Wiring Harness Cable Loom Driver Side 8E1971035AH

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7N0906093

Fuel Pump Module VW Volkswagen Sharan 7N Fuel Sender Control Unit ECU 7N0906093

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8512415-7

Mini Cooper SD R60 ALL4 N47N 143HP Engine ECU Kit DDE 8512415 CAS3 Key Manual

£94.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8E0857925C

Audi A3 8P A4 B7 Glovebox Compartment Ipod Interface Connector 8E0857925C

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4D0907131

Audi VW Volkswagen Seat Relay Unit Module 4 Pins 12V 4D09907131

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5Q4959592N

VW Volkswagen T-ROC AV11 Front Door Control Module ECU Passenger Side 5Q4959592N

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5WB959107B

Audi Q2 GA Rear Boot Trunk Lid Tailgate Control Unit Module ECU 5WB959107B

£66.95

Free delivery: Aug 28

If paid before 14:00

Part no. BJ32-17509-AC

Range Rover Evoque L538 Control Unit Module BJ32-17509-AC

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8J0907361

Audi TT 8J Central Electric System Fuse Box Housing Bracket Retainer 8J0907361

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8J0035456A

Antenna Amplifier Audi Q5 8R A6 C6 A5 8T Mobile Phone Module Unit 8J0035456A

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. BM51-13405-AK-1

Ford Focus Mk3 Rear Tail Light Lamp Wiring Cable Left N/S BM51-13405-AK

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A6549009600-3

Mercedes GLC 220d X253 654.920 194HP 4Matic Engine Control Unit A6549009600

£161.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A1765405608

Mercedes-Benz A-Class W176 Rear Right Door Wiring Cable A1765405608

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8K0907064FM

Audi A4 B8 Body Comfort Control BCM Module Unit ECU 8K0907064FM

£189.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8W0959121B

Audi A4 B9 A5 F5 Pressure Sensor Pedestrian Protection System 8W0959121B

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. A1775408609

Door Wiring Mercedes W177 W247 Front Passenger Side Cable Harness A1775408609

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8378337

BMW 3 Series E46 Cable Harness Wiring Loom Door Rear Left / Right N/O/S 8378337

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9M5Q-12A343-AA

Ford Mondeo Mk4 S-Max Galaxy Glow Plug Relay 2.0 TDCi Diesel 9M5Q-12A343-AA

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 7P5971161BA

Porsche Cayenne S 92A Front Door Wiring Harness Cable Right O/S 7P5971121BA

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. R8A2-12B684-VAB

Range Rover L551 Engine Control Unit ECU 204HP 2.0 Diesel Hybrid R8A2-12B684-VAB

£284.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 9221464

Seat Module BMW F01 Front Left Control Unit Controller SM MF/M-HL 9221464

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2055406831

Door Wiring Mercedes A205 Pasenger Side Door N/S Harness Loom A2055406831

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4F5945095L-2

Audi A6 C6 Saloon Rear Tailgate Trunk Lid Light Lamp Wiring Left N/S 4F5945095L

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 01396660080

Citroën Relay III Relay Boxer Alarm Siren Anti-Theft Signal Moduele 01396660080

£56.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9350314

BMW G30 G31 G11 G12 G32 G38 Front Power Distribution Fuse Box Left N/S 9350314

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 1Z0197121DL

Skoda Octavia Mk2 Front Door Wiring Harness Cable Passenger Side 1Z0197121DL

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9228493

BMW F11 Body Control Module Unit Junction Box 9228493

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8058634

Engine Wiring BMW X3 M F97 X4 M F98 Loom Harness Ignition Module 8058634

£189.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 5A3CE25

BMW F40 F44 Body Control Module ECU Domain Controller Unit Module 5A3CE25

£189.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2049005908-1

Mercedes W204 Navigation CD Player COMAND Radio Sat Nav Head Unit A2049005908

£94.95

Free delivery: Aug 28

If paid before 14:00

Part no. 117103703R

Renault Master II Alternator Support Bracket Mount 117103703R

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. CA6T-14B526-DC

Ford Fiesta Mk7 Start Stop Engine Module Control Unit ECU CA6T-14B526-DC

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. BM51-18K811-TA

Ford Focus MK3 Multimedia Control Switch Panel BM5T-18K811-TA

£37.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9108202

BMW G30 G31 G11 Front Camera Module Windscreen Control Unit Lane Assist 9108202

£56.95

Free delivery: Aug 28

If paid before 14:00

Part no. A0005459712

Mercedes W447 OM654 Power Distributor Box Conectors Socket A0005459712

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. T15900206

Trefor Tripl Cargo Scooter Fuse Solenoid Cable Electrical Loom Wiring T15900206

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8574372-4

BMW F07 530d F01 730d N57N Engine Control Unit ECU DDE Kit CAS4 + Key 8574372

£189.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4F0919805

Audi A4 B8 Smart Card Reader Smart Card System TV 4F0919805

£23.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4L0919283E

Audi Q7 4L PDC Parking Distance Sensor Control Module Unit ECU 4L0919283E

£89.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8W7907468C

Audi A4 B9 A5 S5 F5 Gateway Module Control Unit 8W7907468C

£170.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 9394669

BMW X3 F25 Footwell Light Module Control Unit ECU FRM3 9394669

£80.95

Free delivery: Aug 28

If paid before 14:00

Part no. T60RX-03WCH

Tele Radio Tipper Remote Control Receiver Transmitter Module T60TX-03TTL 433 MHz

£94.95

Free delivery: Aug 28

If paid before 14:00

Part no. rhd-A2055451540

Mercedes W205 SAM Module Control Unit Bracket Cover Holder Carrier A2055451540

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8574095-1

BMW F20 F21 F30 F31 116d 316d Diesel N47N 116HP Engine ECU DDE 8574095 Automatic

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8K0907801K

Audi A4 B8 Parking Brake Control Module Unit ECU 8K0907801K

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8570933-1

BMW F20 F21 F30 116d 316d Diesel N47N Engine ECU DDE 8570933 Key Lock FEM Manual

£265.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2139004710

Bluetooth Module Mercedes W213 Multimedia Control Unit ECU A2139004710

£113.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-4H2919600C-1

Audi A8 D4 Sat Navi Multimedia Head Unit Radio Control Switch Panel 4H2919600C

£47.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-5F4971030FL

Seat Leon Mk3 Front Passenger Door Wiring Loom Harness Cables 5F4971030FL

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2719000600

Mercedes W203 C180 Kompressor M271.946 Engine Control Unit ECU A2719000600

£94.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8621017

BMW G20 G21 G30 G31 LCI G11 G12 Cell Module Connector Harness Loom Cable 8621017

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5A23E01

BMW F44 B38C 218i Petrol Engine Control Unit ECU DME 5A23E01 Manual

£180.95

Free delivery: Aug 28

If paid before 14:00

Part no. 5A68284

BMW i4 G26 Positive Battery Cable Harness Wiring Loom 5A68284

£104.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9210858

BMW 5 Series F10 F11 Power Distribution Fuse Box Rear 9210858

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2055455100

Mercedes W205 W213 C238 Power Distribution Unit Busbar Connector A2055455100

£28.95

Free delivery: Aug 28

If paid before 14:00

Part no. RHD-9251191-1

Lever BMW F12 F25 F10 F26 Gear Selector Switch Automatic Transmission 9251191

£80.95

Free delivery: Aug 28

If paid before 14:00

Part no. 6976156

BMW E60 E61 E63 Passenger Side Door Air Control Module 6976156

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2055406292

Mercedes C205 Rear Parking PDC Sensor Loom Wiring Harness Cable A2055406292

£66.95

Free delivery: Aug 28

If paid before 14:00

Part no. EJ32-14B673-AB

Land Rover Evoque L538 Tailgate Control Module Unit ECU J32-14B673-AB

£32.95

Free delivery: Aug 28

If paid before 14:00

Part no. 9231174

BMW 3 4 F30 F32 Touring Amplifier Rear Window Antenna Diversity 9231174

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. 8647878

BMW X5 F15 N20 Petrol Sensor System Engine Wiring Harness Cable Loom 8647878

£142.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. T15900204

Trefor Tripl Cargo Scooter Battery Motor Cable Electrical Loom Wiring T15900204

£18.95

Free delivery: Aug 28

If paid before 14:00

Part no. 4N0907064DD

Audi A6 C8 Body Control Comfort Unit Module BCM Convenience Unit ECU 4N0907064DD

£94.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 8663284-3

BMW F20 LCI F30 LCI B38 136HP Engine Control ECU Kit DME 8663284 Automatic

£427.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. 7L0915138C

Audi Q7 4L Battery Mounting Bracket Part Holder 7L0915138C

£13.95

Free delivery: Aug 28

If paid before 14:00

Part no. FV61-12A650-APA

Ford Transit Connect Mk2 1.5 TDCI Engine Control ECU FV61-12A650-APA Automatic

£175.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A2319003706

Mercedes R231 Control Unit Module Passenger Seat A2319003706

£94.95

Free delivery: Aug 28

If paid before 14:00

Part no. A2661536779-1

Mercedes W245 M266.920 95HP Engine Control Module Kit A2661536779 Automatic

£108.95

Free delivery: Sep 1 – 8

If paid before 14:00

Part no. A0009060086

Mercedes W205 Control Unit Power Distribution Box Electrical A0009060086

£32.95

Free delivery: Aug 28

If paid before 14:00

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