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 G11 G12 G20 G30 Ground Line Battery Earth Cable Wire Cable 8638742

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9313616

BMW F30 F31 Driver's Side Door Wiring Electrical Loom Harness Cable 9313616

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2129063102-1

Fan Blower Mercedes W212 Comand Navi CD Control Unit Module Cooler A2129063102

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5G6919605A

VW Volkswagen Golf Mk7 VII Multimedia Sat Nav Radio Display Screen 5G6919605A

£113.95

Free delivery: Aug 27

If paid before 14:00

Part no. DH22-14B192-DA

Land Rover Discovery Sport L550 Relay 5-Pin Unit 12V 40A Black DH22-14B192-DA

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. CPLA-17D547-AD

Range Rover Evoque L538 Rain Sensor Module Control Unit CPLA-17D547-AD

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8616810

BMW 1 2 3 4 Series F20 F21 F22 F23 F30 F31 F32 Battery Cable Connecying Line

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6421509478-3

Mercedes W164 ML320 OM642.940 224 HP 4Matic Engine ECU Kit A6421509478 Automatic

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129007324

Mercedes SLK R171 Petrol M271 Fuse Box SAM Relay Control Module A2129007324

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7L6937049J

Volkswagen Touareg 7L Onboard Supply Comfort Unit Module ECU 7L6937049J

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5F0919606

Seat Leon FR 5F Dashboard Multimedia DIsplay Sat Nav Screen 5F0919606

£165.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8798221

BMW F45 F46 6,5" Display Screen Central Information Navigation Monitor 8798221

£85.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6843901

BMW F20 Module BCM Body Control Unit Module ECU 6843901

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2128270026

Mercedes W207 W212 Harness Wiring Cable Connection Media Interface A2128270026

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-7811813

BMW 1 X1 3 Series E81 E82 E84 E87N E90 Wiring Harness Engine Gearbox Module

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1779002410

Mercedes W177 Air Module SRS System Control Unit ECU A1779002410

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5A04A04

Mini F54 F55 F56 F60 Telematics Module Bluetooth Control Unit ECU 5A04A04

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8K0959795A

Audi A4 B8 Rear Door Module Control Unit ECU Left N/S 8K0959795A

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9154331

BMW MINI Clubman R55 Cable Wiring Loom Splitdoor Split Door Rear Right O/S

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7811702-3

BMW E81 E82 E87 LCI E88 N47S 123d ECU Kit DDE 7811702 + CAS3 + Key Automatic

£189.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A1775407923

Mercedes V177 Main Body Wire Harness Pipe Electric A1775407923

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6988079

BMW X5 E53 Navigation System Video Module Control Unit High 6988079

£104.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8240500

Wiring Loom Cable BMW E46 X5 E53 X3 E83 Seat Occupancy Sensor 8240500

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8T0959792P

Audi A5 8T Front Door Control Module Right O/S Passenger Side 8T0959792Q

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8574091-2

BMW F10 F11 520d N47N 184HP ECU Kit Unit DDE 8574091 CAS4 Keys Manual

£142.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9243637

BMW X3 F25 Rear Bumper PDC Wiring Loom Parking Sensor Cable Harness 9243637

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2219006102

Television Tuner Mercedes W207 W221 TV Receiver Control Unit Module A2219006102

£161.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4K0035063D

Audi A6 C8 MIB2 Multimedia Navigation Radio Control Head Unit 4K0035063D

£569.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 8512500-1

BMW E81 E82 E87 LCI E88 123d Engine N47S ECU Kit DDE 8512500 CAS3 + Key Manual

£265.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8574372-2

BMW F30 F32 330d 430d N57N Engine Control Unit ECU Kit DDE 8574372 Automatic

£123.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6461501077

Mercedes Vito W639 OM646.980 Engine ECU Control Unit Module A6461501077 Manual

£85.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4H0971284

Audi A8 D4 4H Engine Cooling Fan Wiring Harness loom Cable 4H0971284

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8E0907277

Audi A6 C6 TPMS Tyre Pressure Monitoring System Antenna 8E0907277

£80.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9371789

BMW F20 F21 F30 F31 Bluetooth Teleservices GPS Telematics Module 9371789

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4H0907182H

Audi A8 D4 4H Front Seat Backrest Control Module Unit ECU 4H0907182H

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6964141

BMW 7 Series E65 E66 E67 Control Unit Module Door Front Driver Side 6964141

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7254970

BMW E92 LCI Grille Trim Panel Chrome Frame Front Right O/S 7254970

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6915999

BMW 7 Series E65 E66 Rear Seat Wiring Cable Electrical System 6915999

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4G0907401S-1

Audi A7 4G C7 3.0 TDI CDUD 245HP Quattro Engine Module ECU 4G0907401S Automatic

£284.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8707828

BMW G20 G30 Hybrid Battery Charge Control Module Unit ECU 8707828

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7540203

BMW X5 Series E70 Control Unit DME Module Emergency Release Lock 7582630

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2059006921

SAM Module Mercedes W205 GLC X253 Front Body Comfort Control Unit A2059006921

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9290610

Mini R57 LCI R58 R59 Passenger Door Wiring Loom Harness Cables 9231842

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9333024

BMW i3 I01 Front Door Ambient Light Control Unit LED Module 9333024

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0025428919-1

Mercedes W176 W246 Relay 5-Pin Yellow Hella 12V SET X2 A0025428919

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8677247

Mini Countryman F60 Cable Alternator Starter Wire 12428677247 8677247

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1Z0919475B

Skoda Yeti 5L Octavia Mk2 Parking Distance Control Unit Module PDC 1Z0919475B

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4M0907355B

Audi A4 B9 TDI Diesel Adblue Dosing Module Control Unit 4M0907355B

£275.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 3G0962243D

Audi A4 B9 Rear Hatch Boot Lid Tailgate Opening Control Module Unit 3G0962243D

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8678976

Engine Wiring Mini F56 BMW F40 Petrol B38C Valvetronic Servo Motor Harness

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 283930431R

Roof Microphone Mercedes Citan W415 Interior Mic Unit Wiring Cable 283930431R

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2118209626

Mercedes W211 W219 Alarm Control Module Unit ECU A2118209626

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9298947

BMW E93 LCI ECU Body Control Module H4 Junction Box PL2RR JBBFE IIIR 9298947

£40.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6768964

BMW 5 6 Series E60 E61 E63 E64 Active Steering Control Unit Module 6768964

£188.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4G5971693C

Audi A6 C7 4G Door Card Harness Loom Cable Wiring Rear Left N/S 4G5971693C

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7800164

BMW F10 F11 N57 N57S Positive Battery Cable Alternator Starter Lead 7800164

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2829003300-1

Mercedes W177 A180 282.914 136HP Petrol ECU Kit A2829003300 Key BCM Automatic

£208.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 9337210

BMW 4 F33 F83 M4 Cabrio Front Door Driver's Side Wiring Loom Cables 9337212

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9399269

BMW X5 F15 Front KaFAS Camera Speed Limit Control ECU Module Unit 9399269

£51.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7793200

BMW X5 E70 X6 E71 E90 E90N E91 E92 E93 Cable Alternator Starter 7793200

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6821404

High Voltage Cable BMW F45 Mini F60 Hybrid Plugin Alternator 6821404

£279.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 9118263

BMW F01 F02 F03 F10 Antenna Amplifier Module Trap Circuit 9118263

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4M0959793N

Audi A5 F5 A4 B9 Front Door Control Module Unit ECU Driver's Side 4M0959793N

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9505281

BMW G11 G12 G30 G31 G32 F90 F97 X3M F98 X4M Control Unit SAS Module ECU 9505281

£151.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2079059702

Mercedes-Benz W207 A207 Radio Aerial Antenna Amplifier Module Unit Right O/S

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8E9035382E

Audi A4 S4 B7 Avant Boot Sound Booster Amplifier Stereo Bose 8E9035382E

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5Q0980653G

Audi TT FV Front Camera Module Lane Assist Control Unit 5Q0980653G

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1439740

BMW X5 E53 Cable Starter-Base B Electrical Cable Wiring 3.0i M54 Petrol 1439740

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9338910

Mini Cooper F56 Wiring Driver's Loom Front Right O/S Door Cables 9338910

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4H0959793R

Audi A8 D4 4H Front Door Control Module Unit ECU Driver's Side 4H0959793R

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6421508900-2

Mercedes W212 E350 CDI OM642 Engine Unit ECU Kit A6421508900 Keys Lock Automatic

£332.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9247081

BMW X1 E84 Wiring Loom Harness Passenger Side 9247081

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9886543

BMW X2 F39 20dX Diesel B47D 140KW ECU Engine Control Module Automatic 9886543

£275.95

Free delivery: Aug 27

If paid before 14:00

Part no. CV1T-14B532-BF

Ford Fiesta Mk7 Door Module Control Unit Rear Left Right N/O/S CV1T-14B532-BF

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8573258

BMW F20 F21 F30 F31 116d 316d 118d 318d Diesel N47N Engine ECU 8573258 Manual

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A1716281214

Mercedes SLK R171 Battery Bracket Mount Holder Carrier A1716280714

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4G0907553F

Audi RS6 C7 4G Air Suspension Module Regulation Control Unit WABCO 4G0907553F

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469000516

Radio CD Player Mercedes W176 W246 COMAND Nav Sat Head Unit A2469000516

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9352574-1

Mini Cooper F56 Wiring Passenger Loom Front Left N/S Door Cables 9352574

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2055402324

Mercedes W205 Center Console Ambient Lighting Light Wiring Harness A2055402324

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2057200522

Mercedes GLC X253 Front Door Trim Cover Panel Strip Left N/S Black A2057200522

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. 4H0959793P

Porsche Cayenne 92A Front Door Control Module Unit ECU Driver's Side 4H0959793P

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8570442

Engine Wiring BMW F25 F26 2.0dX B47 Loom Module Harness Cable Automatic 8570442

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8512292-2

BMW E90 E91 LCI N47N 316d 116HP Engine ECU Kit DDE 8510832 + CAS3 + Key Manual

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 3R0919475

Seat EXEO PDC Parking Sensor Distance AID Module Control Unit ECU 3R0919475

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2135452040

Mercedes W213 Head Unit Bracket Control Unit Module Holder Mount A2135452040

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6831173

Mini F60 Front Door Harness Loom Cable Wiring Left Right N/O/S 6831173

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9285504

Distributor BMW X5 F15 X6 F16 B + Battery Power Distributor 9285504

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0015424523

Parktronic Display Mercedes W207 W212 PDC System Parking Sensor A0015424523

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9366338

Dashboard Wiring BMW G30 G31 Front Centre Console Loom Harness 9366338

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8585933

Wiring Loom Harness BMW F20 F30 F36 LCI B47 Engine Gearbox Module 8585933

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. 0AD927755BE

VW Volkswagen Touareg 7L Transfer Box Control Unit Module ECU 0AD927755BE

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. F1ET-14F239-AA

Ford Focus Mk3 Multifunction Screen Radio Multimedia Display F1ET-14F239-AA

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6807634-1

Air Module BMW F10 F11 F22 F30 LCI F32 X3 F25 SRS Control Unit ECU 6807634

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8574351-1

BMW X1 E84 18d Diesel N47N Engine Unit ECU Kit DDE 8574351 + CAS3 + Key Manual

£170.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8735982

BMW G30 G31 F90 M5 G11 Antenna Aerial Diversity Amplifier Unit 8735982

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2169000201

Mercedes C216 W221 Door Control Module Unit Front Right O/S A2169000201

£89.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8577243

BMW X3 F25 Battery Cable Wire Lead Positive Alternator Starter X4 F26 8577243

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7432799

BMW X5 X6 F15 F16 Diesel Adblue Module Control Unit ECU 7432799

£23.95

Free delivery: Aug 27

If paid before 14:00

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