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 7 Series E65 E66 Wiring Loom Harness Right O/S Front Door 6934028

€23.95

Free delivery: Sep 23 – 24

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Part no. 8H22-18N378-AB

Land Rover Discovery 4 L319 Battery Tray Holder Trim Right O/S 8H22-18N378-AA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9226880

BMW F20 F21 Radio Aerial Antenna Amplifier AM/FM Control Unit Module 9226880

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 46860639

Peugeot Boxer Fuse Box Cover Lid Trim 46860639

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2133401900

Mercedes W205 W213 High Voltage Battery Holder Mount Bracket Support A2133401900

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8369504

BMW 5 E39 Saloon Radio Signal Antenna Amplifier Coaxial Cable 8369504

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. GK2V-14301-FB

Ford Transit Mk8 Negative Battery Cable Wire Terminal GK2V-14301-FB

€66.95

Free delivery: Sep 23 – 24

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Part no. 8612583

BMW F45 Mini F60 HV Accumulator Battery Positive B+ Cable Ground 8612583

€23.95

Free delivery: Sep 23 – 24

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Part no. 8595865

Wiring BMW F32 F33 F36 LCI N57Z Engine Gearbox Module Wiring Harness 8595865

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729060105

Mercedes SLK R172 Rear Fuse Box SAM Relay Control Unit Module A1729060105

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8579480-1

BMW F20 120d F30 320d F10 520d N47N 184HP Engine Control Unit DDE 8579480 Manual

€94.95

Free delivery: Sep 23 – 24

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Part no. 9286219

BMW 3 Series F30 F31 Front Door Wiring Loom Cable Harness 9286219

€37.95

Free delivery: Sep 23 – 24

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Part no. A2054404136

Mercedes W205 Battery Lead Wiring Loom Cable Hybrid Cable Harness A2054404136

€47.95

Free delivery: Sep 23 – 24

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Part no. 8W0971035BA

Audi A4 S4 RS4 8W A4 B9 Door Wire Harness Front Passenger Side 8W0971035BA

€23.95

Free delivery: Sep 23 – 24

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Part no. 6M21-14B684-AA

Ford Mondeo Mk4 Front Seat Wiring Loom Harness Left Right N/O/S 6M21-14B684-AA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2134400200

Mercedes GLC 300e X253 Electric Drive Ground Earth Line Wire A2134400200

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8482365

BMW G20 Installation Cable Wiring Loom 8482365

€37.95

Free delivery: Sep 23 – 24

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Part no. 7542310

BMW Mini Cooper One R50 DME Petrol Engine Control Unit ECU Automatic 7542310

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2125420018-BLA

Mercedes W169 W204 W212 Parking Sensor PDC Front Black A2125420018

€23.95

Free delivery: Sep 23 – 24

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Part no. 6933968

BMW Z4 Series E85 Wiring Drivers Side Loom Front Door Cables Right O/S 6933968

€43.95

Free delivery: Sep 23 – 24

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Part no. 2745388

Ford Fiesta Mk8 Puma Key Fob Remote Control K1BT-15K601-DE

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1371248

Ford Transit Mk7 Minus Negative Battery Mass Cable Wiring Loom 6C1T-14303-DA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 51834074-1

Fiat Panda Mk2 1.1 54HP 187A1000 Engine ECU Kit Key Ignition BCM 51834074 Manual

€123.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8605530

Engine Unit Bracket BMW G30 G31 G11 G15 ECU Module Holder Bracket Mount 8605530

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8T0959792Q

Audi A5 8T Front Door Control Module Passenger Side 8T0959792Q

€23.95

Free delivery: Sep 23 – 24

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Part no. 6751504

Module Holder BMW X5 E53 Rear Tyre Pressure Control Module Mount Bracket 6751504

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1765405905

Mercedes W176 Center Console Wiring Loom Electrical Harness A1765405905

€23.95

Free delivery: Sep 23 – 24

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Part no. 8618444

BMW F30 LCI 330e B48X Cell Module Connector 8618444 61278618444

€28.95

Free delivery: Sep 23 – 24

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Part no. 079903805E

Audi A4 B8 S5 8T 4.2 FSI Alternator Bracket Mount Holder 079903805E

€23.95

Free delivery: Sep 23 – 24

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Part no. EJ32-14308-BC

Range Rover Evoque L538 Start Stop Power Supply Cables EJ32-14308-BC

€37.95

Free delivery: Sep 23 – 24

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Part no. AV4T-14D202-BA

Ford Kuga Mk1 Bluetooth Module Wiring Harness Cable AV4T-14D202-BA

€23.95

Free delivery: Sep 23 – 24

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Part no. A2129010700

Mercedes W212 ECU Control Unit Sensor Module Airbag A2129010700

€23.95

Free delivery: Sep 23 – 24

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Part no. 05C907394D

Seat Arona Fr Kj7 Engine ECU 110HP 1.0 TFSI Manual Gearbox Petrol 05C907394D

€94.95

Free delivery: Sep 23 – 24

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Part no. 1Q0971120P

Volkswagen Eos Front Door Wiring Loom Harness Cable Passenger Side 1Q0971120P

€23.95

Free delivery: Sep 23 – 24

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Part no. A0009051816

Mercedes C118 W167 W177 W206 C247 Front Windscreen Camera Assist A0009051816

€70.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6G9N-17D547-AD

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1569007402

Mercedes W176 W246 Body Control Module Unit Fuse Box BCM ECU A1569007402

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2119820302

Mercedes W211 C219 Prefuse Fuse Distribution Box Electric Unit Front A2119820302

€23.95

Free delivery: Sep 23 – 24

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Part no. 06E971627H

Audi A5 8T Injector Wiring Harness Cable Cylinders 1-3 3.2 FSI 07L971627F

€23.95

Free delivery: Sep 23 – 24

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Part no. 7PP907064JF

Porsche Cayenne S 92A Macan 95B Body Control Module Unit ECU 7PP907064JF

€151.95

Free delivery: Sep 23 – 24

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Part no. 5A67892

BMW X1 U11 Door Wiring Loom Harness Passenger Side N/S 193444-11

€23.95

Free delivery: Sep 23 – 24

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Part no. M8A2-14633-DB

Land Rover Range Rover Velar L560 Door Card Wiring Rear Left N/S M8A2-14633-DB

€37.95

Free delivery: Sep 23 – 24

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Part no. 5A5FD59

Mini Cooper F65 F66 Antenna Amplifier Booster Control Unit Module 5A5FD59

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8577625-5

BMW F20 F21 B38 118i 136HP B38B15A Engine Control Unit ECU Kit FEM Key Automatic

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. AV6N-15K607-AG

Ford Mondeo Mk4 Kuga Mk2 Interior Roof Alarm Motion Sensor AV6N-15K607-AG

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8J0971085D-1

Audi TT 8J Parking Sensor Wiring Harness Cable PDC Rear Bumper 8J0971085D

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9226901

Body Control Module BMW F01 ECU Junction Box PL6 JBBFE III 3 Lear 9226901

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9229972

Module BMW Z4 E89 Convertible Cabrio ECU Control Unit Controller 9229972

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4539063900

Smart C453 Alternator Generator 90A A4539063900 281920

€123.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. LR028097

Range Rover Evoque L538 Tailgate Trunk Wiring Harness Cable BJ32-10E998-AA

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5WA962133E

Volkswagen Golf 5G Keyless Entry Module Aerial Antenna 5WA962133E

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729056500

Mercedes-Benz A B Class W176 W246 Aerial Antenna Cable A1729056500

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9313992

BMW F13 Front Seat Control Module Unit ECU Left Right N/O/S 9313992

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. NNN500560

Land Rover Discovery 3 L319 Engine ECU 276DT 190HP NNN500560 Automatic

€70.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6884612

Mini Cooper F55 F56 F57 Parking Assistant Control Module 6884612

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6S61-12A650-XB

Ford Fiesta Mk6 ST150 N4JB 150HP Engine ECU Kit 6S61-12A650-XB BCM + 2 Keys

€332.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1779004215

Mercedes C118 W177 Radio Stereo Satellite Navigation Head Unit A1779004215

€336.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7420992-1

BMW F22 F23 F87 M2 LED Tail Light Lamp Rear Right O/S Wire Cable Harness 7420992

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0035421019

Relay Mercedes C117 GLA X156 ML W166 W176 W246 5 Pins Yellow A0035421019

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. CK52-14F641-AK

Range Rover Vogue L405 Evoque L538 TV Tuner Control Unit Module CK52-14F641-AK

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1648220230

Mercedes W164 W212 Alarm Sensor Warning Buzzer Module Unit A1648220230

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. J8A2-17509-AA

Range Rover Velar L560 Radio Supression Module Passive FIltering J8A2-17509-AA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 2K5907561C

Volkswagen Caddy Maxi 2k Front Distance Radar Sensor 2.0 TDI Diesel 2K5907561C

€70.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7645963

BMW X5 F15 Trim Cover Hosuing Tray High Voltage Battery 8682676

€75.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. 8K5945095AC-1

Audi A4 B8 Rear Tail Light LED Wiring Harness Cable Plug Left N/S 8K5945095AC

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6398201689

Mercedes Vito W639 Sound Audio Amplifier Control Unit Module A6398201689

€284.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005400664

Mercedes W205 Battery Cable Wiring Harness Loom Petrol Hybrid A0005400664

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6977054

BMW X5 E70 Driver Side Front Right O/S Door Cable Harness Wiring 6977054

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8632687

BMW i3 I01 Engine Motor Sensors Module Wiring Cable Wire Harness 8632687

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4L0937555A

Audi Q7 4L Fuse Relay Box Housing Trim Panel Lid Cover 4L0937555A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7381015

BMW F01 Headlight Headlamp Control Module Unit 7381015

€270.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5WA907727AB

VW Volkswagen Caddy SB Air Conditioning Climate Control Module ECU 5WA907727AB

€80.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1T0907539C

Volkswagen Touran 1T Dashboard Solar Sun Sensor 1T0907539C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8602123

BMW i3 I01 Hybrid Electric Earth Ground Cable Line Strap Battery Lead 8602123

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8S0907468D

Audi TT FV Mk3 8S Gateway Module Interface Data Bus Control Unit 8S0907468D

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229001206

Mercedes W205 C300h Drivetrain Control Module Hybrid A2229001206

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. JT7614B321AB

Ford Transit Courier Air Module Control Unit SRS ECU JT76-14B321-AB

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1725405004

Mercedes SLK R172 Wiring Harness Cable Adapter Connector A1725405004

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8368210

BMW E46 Antenna Amplifier TV Aerial Control Module Unit 8368210

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6945075

BMW 3 Series E91 E91N LCI Bracket Holder CD Changer Radio Player 6945075

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6925942

BMW E60 E61 Cable Loom Door Wiring Harness 6925942

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0971029AQ

Audi A4 S4 B8 Door Wiring Harness Loom Cable Front Right O/S 8K0971029AQ

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. CPLA-19G442-AC

Range Rover L405 Wireless Headphones Transmitter Receiver Module CPLA-19G442-AC

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2188200187

Mercedes W221 Multimedia Interface USB Adapter Port Socket A2188200187

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8483811

BMW X3 G01 X4 G02 Alternator Positive Cable Wiring Loom Connector 8483811

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5QS919298

Audi A3 S3 8Y VW Caddy SB Mk4 Parking Sensor Module Control Unit 5QS919298

€161.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9387145

BMW F30 LCI 330e B48X Negative Earth Cable Battery 9387145

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215402350-1

Mercedes W221 W216 Fuse Box Junction Control Unit Relay Module A2215402350

€28.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. 7811176

Wiring BMW X3 F25 Automatic Gearbox Module Engine Wiring Harness 7811176

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8518269-7

BMW E90 E91 LCI N47N 320d 184HP Engine ECU KIT DDE 8518269 CAS3 Key Automatic

€108.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9120812

BMW E60 E61 Door Wiring Harness Cable Loom Rear Right O/S 9120812

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049057501

Mercedes W204 W212 Dashboard Light Sun Solar Sensor Unit A2049057501

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009827403

Mercedes W205 Energy Distributor Power Electrical Control Unit A0009827403

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0971230HF

Volkswagen Passat B8 Alternator Wiring Loom Harness 2.0 TDI Diesel 5Q0971230HS

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009828223

Mercedes W213 Power Relay 4 Pin 12V Hella A0009828223

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6401503434-1

Mercedes W169 A160 CDI OM640.942 82HP Engine ECU Kit A640150363 Automatic

€237.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 8U0907297

Audi Q3 8U Trailer Towing Module Bracket Holder Mount Support Housing 8U0907297

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059067200-1

Mercedes W205 S205 W213 Fuse Box Front Relay Control Unit Module A2059067200

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

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