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

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 0AD927755BE

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

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2079002800

Mercedes W207 Convertible Door Module Front Right O/S Control Unit A2079002800

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 2Q0937615A

Volkswagen Polo Mk6 Fuse Relay Box Power Supply Unit 2Q0937615A

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8865047

Bmw X1 U11 Low Voltage Wiring Harness Cable Loom 8865047

€80.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2539059800

Mercedes W205 Lid Boot Trunk Tailgate Smart Opener Control Module A2539059800

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8606445

Wiring Harness BMW F20 F21 F30 LCI Motor Sensor System Module 1 8606445

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0055461340-1

Mercedes Vito W447 Energy Distributor Plug Module A0055461340

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8V4971030H

Audi S3 8V 5Dr Front Door Wiring Harness Loom Passenger Side 8V4971030H

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9140942-BAR

BMW 1 3 Series E87 E90 E91 LCI Rear PDC Ultrasonic Parking Sensor Barbera Red

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8583423

Mini D R60 R61 ALL4 N47N 112HP Engine ECU Control Unit DDE 8583423 Manual

€94.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8681185

BMW F40 F44 F46 X1 F48 Mini F54 F56 F57 F60 Engine Wiring Loom Harness 8681185

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1729060205-1

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

€89.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 09D927750AK

Porsche Cayenne 955 9PA Automatic Gearbox Module Control Unit ECU 09D927750AK

€51.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8X0907357C

Audi TT 8J Headlight Head Light Lamp Range Control Unit Module ECU 8X0907357C

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0025428719

Mercedes W176 W204 W207 W166 Relay 4 Pin Grey Hella A0025428719

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1779001304

Door Module Mercedes C118 W177 W247 Front Left N/S Control Unit A1779001304

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. K8D2-19C097-AA

Land Rover Discovery Sport L550 Aerial Antenna Control Module K8D2-19C097-AA

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 1K0971235J

Audi A3 Volkswagen Golf Battery Wire Cable Negative Earth Lead 1K0971235J

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8H2214N131CA

Land Rover Discovery 4 Driver's Seat Memory Wiring Loom Harness 8H22-14N131-CA

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0025428919

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

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 06H903016L

Audi A5 8T Engine Alternator Generator 14V 140A Bosch 2.0 TFSI 06H903016L

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. CPLA-17D547-AJ

Land Rover Discovery Sport L550 Windscreen Rain Sensor Module CPLA-17D547-AJ

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8P4035223B

Audi S3 8P Audio Sound BOSE Amplifier Stereo System Module 8P4035223B

€132.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. LR024071

Range Rover L322 Car Ignition Key Remote Control 433.92MHZ LR024071 AH4215K601BF

€80.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2049004106

Parktronic Module Mercedes W204 PDC Parking Sensors Control Unit A2049004106

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9316655

Seat Wiring BMW X3 F25 X4 F26 Driver's Side Loom Cable 9316654

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A4145401130

Mercedes Vaneo W414 Starter Wiring Harness Battery Ground Cable A4145401130

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6819334

BMW F20 F21 F30 F31 REM Rear Electronic Module Fuse Box Control Unit V3 6819334

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2479005709

Mercedes W177 W247 Electronic Control Unit Module Speedo Meter ECU A2479005709

€256.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2125404600

Mercedes W212 AMG Front Bumper Parking Sensor PDC Wiring Harness A2125404600

€75.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9224673

BMW E81 E87 E90 E91 Hands-free Electronics Charging MULF2 9224673

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. L0283086

Range Rover L405 Rear Seat Bench Cooler Blower Unit Right O/S L0283087AA

€47.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 94520-4H0004X

Hyundai H-1 Dashboard Panel Digital Clock Watch Unit 94520-4H0004X

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 2755704-1

Mini Cooper One R55 R56 R57 R60 R61 Fuse Box Empty Housing 2755704

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 83F877041A

Audi Q3 F3 Mk2 Panoramic Sunroof Control Unit Module ECU 83F877041A

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. AB39-14A076-BF

Ford Ranger Mk6 Fuse Box Control Unit Housing Cover Trim Panel AB39-14A076-BF

€99.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7590857-4

Mini Cooper S JCW R56 N14 1.6 211HP Engine ECU Kit DME 7590857 CAS3 Key Manual

€688.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6924519-2

BMW E82 E88 Rear Lamp Taillight Tail Light Wiring Cable Left N/S 6984754

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0009058000

Windscreen Camera Mercedes W207 W221 Front Windshield Module Unit A0009058000

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2059007339

Mercedes W205 BCM Body Control Module Unit ECU A2059007339

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9282424

BMW 3 5 Series F10 F30 Control Unit Module Top Rear Side View Camera 9282424

€170.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. TSR-152

BMW E88 Cabrio Convertible Battery Control Unit Module ECU 12V TSR-152

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5Q0937085AC

VW Volkswagen Golf GTI Mk7 Body Control Module BCM CHHN Automatic 5Q0937085AC

€113.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7582309-1

Mini R55 R56 R60 R61 Engine Starter Motor Mitsubishi 7645594

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9166869

Mini Cooper R56 Hands-free Electronics Charging MULF2 9166869

€108.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1635400734

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

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9352574

Mini Cooper F56 Wiring Loom Front Left N/S Door Cables 6809486

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4F0919805

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

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. AV6N-11000-GE

Ford Focus Mk3 Transit Connect Starter Motor Diesel Engine AV6N-11000-GE

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2129003408

Mercedes W204 W221 Fuel Pump Module Control Unit A2129003408

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5CH971120E

Volkswagen Jetta Mk6 Front Door Wiring Harness Cable Passenger Side 5CH971120E

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4H0941824

Audi A6 C8 Fuse Box Relay Plug Socket Fuse Unit Holder Bracket 4H0941824

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2055408987

Mercedes W205 Exhaust Wiring Harness Cable A2055408987

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8K0959795A

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

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2048709289

Mercedes W204 Right O/S Antenna Amplifier Filter Module A2048709289

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4H0907412

Audi A8 D4 Ambient Lighting Control Module Unit ECU 4H0907412

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8605458

Wiring BMW X1 E84 F11 N20 Engine Sensor System Module Wiring Harness 8605458

€108.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. LR007522

Land Rover Discovery 4 L319 Glow Plug Wire Wiring Cable Right O/S 4R8Q-12A378-BE

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1765404609

Mercedes W176 Rear Bumper PDC Wiring Loom Parking Sensor Cable Harness 9364201

€61.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5F0907159E

Seat Leon Mk3 III Cupra 5F Body Impact Sound Control Module Unit 5F0907159E

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6809310

BMW F20 LCI F21 LCI F83 Telematics Communication Module Ecu Control Unit 6809310

€189.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9340524

BMW X3 F25 X4 F26 Central Gateway Module Control Unit Lear ZGW-02 4SK 9340524

€56.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4G0919129A

Audi A5 8T A6 C7 A7 4G A8 4H TV Tuner Digital Video Control Module 4G0919129A

€70.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0035420819

Mercedes W176 W205 W213 W242 W447 W907 Relay 4-Pin Black Tyco Unit A0035420819

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 83A947356J

Audi Q3 F3 LED Rear Door LED Lighting Module Control Unit Left N/S 83A947356J

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6842256

BMW X2 F39 F45 X1 F48 Active Gran Tourer Air Module ECU Control Unit 6842256

€218.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9158040

Mini R55 R56 R57 Flat Cable Wiring Wire CAS 9158040

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1665402350

Fuse Box Mercedes GLE W166 C292 W463 Relay Control Unit Module A1665402350

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2218202910

Mercedes W221 Dashboard Instrument Cluster Panel Switch A2218202910

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0015456403

Mercedes Sprinter W906 Fuse Box Relay Cover Box Cap A0015456403

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8605456

Engine Wiring BMW F21 F30 LCI F36 N20 Loom Module Harness Cable 8605456

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0009063822-1

Alternator Generator Mercedes W176 W246 Diesel Engine Bosch 175A A0009063822

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 93BB14488AB

Ford Focus Mk2 Starter Motor Engine Actuator Cable Wiring Unit 93BB14488AB

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7539787

BMW Mini Cooper R55 R56 R57 R58 Negative Battery Cable 7539787

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6921980

BMW 7 Series E65 E66 Control Unit Door Rear Passenger Side

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4L0959794B

Audi Q7 4L Door Control Module Electrical Unit ECU Rear Right O/S 4L0959794B

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 46355551

Vauxhall Movano C Toyota Proace Max Preheating Box Glow Plug Relay 46355551

€51.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9199491

BMW Mini Clubman R55 Cable Wiring Loom Splitdoor Door Rear Left N/S 9199491

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9118611

BMW Z4 E86 Hifi Audio Sound AMP Amplifier Module 9118611

€574.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8507202-2

BMW 3 Series E90 E91 LCI 318d N47N 143HP ECU Kit DDE 8507202 CAS3 Key Automatic

€218.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7851568

BMW F80 M3 F82 M4 Actuator Drive Exhaust Flap 7851568

€70.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6951079

BMW E60 525i 530i 545i Fuses Set Electrical Fuse 6951079 61146951079

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6814609

BMW 1 3 5 Series F10 F20 F30 Bus Interface Connector Data Terminating 6814609

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9145097

BMW 3 5 7 X3 X5 Z4 Series E38 E39 E46 E53 E85 E83 Control Unit EWS III

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0038202926

Mercedes W164 X164 W221 SRS Airbag Impact Crash Sensor A0038202926

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8J0971349S

Audi TT 8J Alternator Main Cable Wiring Harness Loom CBBB Manual 8J0971349S

€47.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. FK72-19C299-AE

Land Rover Discovery Sport L550 Dashboard Display Screen 8" FK72-19C299-AE

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9284331-3

Roof Light Mini R55 R56 R60 R61 Operating Control Unit Switch 3455632

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0009822523

Mercedes W156 W242 W246 W447 Relay 4-Pin Black Hella A0009822523

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8634124

BMW F40 F45 X1 F48 Mini F55 F56 F60 Alternator Generator Denso 120A 8634124

€47.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. FK72-14F681-AH

Land Rover Discovery Sport L550 Gateway Module Control Unit FK72-14F681-AH

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8K0907551-2

Audi S4 B8 3.0 TFSI 333HP CAKA Quattro Engine Unit ECU Kit 8K0907551 Automatic

€303.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1775405101

Door Wiring Mercedes V177 Rear Door Right Left N/O/S Harness Wire A1775405101

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4G0035502

Audi A7 4G8 Telephone Coupling Reception Antenna Amplifier 4G0035502

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7624617-1

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

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5Q0937084BS

Audi TTS FV 8S BCM Body Control Module Unit 5Q0937084BS

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8K0971228AA

Audi A4 A5 S5 8T 8K 3.0 TFSI Alternator Wiring Harness Loom Cable 8K0971228AA

€61.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0009006318

PDC Module Mercedes W205 W213 W247 Parking Assistant Parktronic Unit A0009006318

€99.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

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