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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Mercedes ML W164 Rear Door Ribbon Electrical Cable Wiring Right O/S

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 03C903023S

Audi A1 8X 1.4 TSI CAXA Alternator 03C903023S

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8638585

BMW F20 F21 F30 F31 LCI Cable Alternator-Starter-Base B+ 8638585

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6977427

BMW E87 E90 E91 Mini Cooper R50 R52 R53 Air Module Control Unit ECU 6977427

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1779004106

Door Module Mercedes C118 W177 W247 Front Right O/S Control Unit A1779004106

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6782372

BMW X1 X3 Z4 E83 LCI E84 E89 E90 E91 E92 Speed Sensor Cluster 6782372

€23.95

Free delivery: Sep 14 – 15

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Part no. 4H4907357B

Audi A8 D4 Headlight Head Light Lamp Range Control Unit Module ECU 4H4907357B

€75.95

Free delivery: Sep 14 – 15

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Part no. 6910920

Mini Cooper One R50 R53 Heater Temperature Control Actuator 0132801166

€23.95

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Part no. A4478200087

Mercedes Sprinter W906 Connector AUX USB Adapter Port Socket A4478200087

€23.95

Free delivery: Sep 14 – 15

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Part no. A2139008430

Mercedes W910 Gearbox Control Module A2139008430

€23.95

Free delivery: Sep 14 – 15

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Part no. 6826984

Air Module BMW F20 F21 F30 F31 Control Unit 6826984 0285013630

€23.95

Free delivery: Sep 14 – 15

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Part no. A2059008618

Mercedes W205 Module SRS Control Module Unit A2059008618

€23.95

Free delivery: Sep 14 – 15

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Part no. 9171948

BMW X5 X6 E70 E71 Air Module Control ECU Unit Module 9171948 0285010250

€23.95

Free delivery: Sep 14 – 15

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Part no. 7G9T-14A073-DF

Ford Galaxy Mk2 Fuse Box Body Control Module BCM Unit 2.0 TDCi 7G9T-14A073-DF

€51.95

Free delivery: Sep 14 – 15

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Part no. 0AM911023N

Audi A3 8V 1.4 TFSI Petrol Starter Motor Engine Actuator Unit 0AM911023N

€23.95

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Part no. 9273584

Seat Belt Module BMW E92 F32 E61 Control Unit LCPA ECU 9273584

€23.95

Free delivery: Sep 14 – 15

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Part no. 7490465-1

BMW F10 F20 F30 F31 Mini F55 F56 Front Heated Seat Control Module ECU 7490465

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4M1907468D

Audi A4 B9 Gateway Control Module Unit ECU 4M1907468D

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Part no. A2045458401

Mercedes W204 Fuse Box Terminal Connection Unit A2115452301

€222.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2049060305-1

Mercedes W204 SAM Module Control Unit Rear A2049060305

€80.95

Free delivery: Sep 14 – 15

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Part no. 9319493

Air Module Unit BMW F10 F11 F30 F31 F25 F12 F13 X3 F25 ECU Control 9319493

€23.95

Free delivery: Sep 14 – 15

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Part no. A2711500420

Mercedes W204 M271 Solenoid SOLV Valve Wiring Harness Petrol A2711500420

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9293305

BMW F20 F21 F30 F31 Rear Electronic Module Fuse Box Control Unit V1 REM 9293305

€23.95

Free delivery: Sep 14 – 15

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Part no. 5A82A01

BMW G20 G21 G28 Side Indicator Control Module Unit Left N/S 5A82A01

€94.95

Free delivery: Sep 14 – 15

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Part no. 6949226

BMW E63 E64 Convertible Coupe DWA Alarm System Module Control Unit 6949226

€23.95

Free delivery: Sep 14 – 15

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Part no. A9079051202

Mercedes Sprinter W907 Battery Wire Negative Lead Cable A9079051202

€23.95

Free delivery: Sep 14 – 15

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Part no. 8624382

BMW 1 3 Series F20 F30 F31 LCI Line Cable Power Distribution Module 8624382

€23.95

Free delivery: Sep 14 – 15

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Part no. LR052994

Land Rover Discovery 4 L319 Rear Parking Sensor Wiring Loom Harness EH2215B484CB

€56.95

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Part no. 7492026

BMW F20 F21 F30 LCI Headlight Control Unit Module FLE2 7492026

€51.95

Free delivery: Sep 14 – 15

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Part no. 9234087

BMW E70 F01 F02 F10 F11 Rain / Light / Solar Fogging Sensor Control Unit 9234087

€23.95

Free delivery: Sep 14 – 15

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Part no. A1644407110

Mercedes W164 Wiring Loom Cable Harness Door Rear Left Right A1644407110

€23.95

Free delivery: Sep 14 – 15

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Part no. 6915327-1

BMW E46 E60 E81 E87 E90 E91 F10 F20 F30 2x Relay Make Contact Sky Blue 6915327

€23.95

Free delivery: Sep 14 – 15

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Part no. 9329703

BMW F20 F21 F30 F31 F32 Rear Body Control Unit Module REM 9329703

€23.95

Free delivery: Sep 14 – 15

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Part no. A0001502780-1

Mercedes W203 CL203 W204 M272 Petrol Ignition Coil Cable Connector A0001502780

€66.95

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Part no. A0009003206

Mercedes W205 W222 Fuel Pump Module Control Unit A0009003206

€23.95

Free delivery: Sep 14 – 15

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Part no. 06E971627N

Audi A4 B8 A6 C7 A7 C7 4G Fuel Injector Wiring Cable 3.0 TFSI 06E971627N

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. NAD500330

Land Rover Discovery 3 Sterter Motor 12V 2.7 V6 LION 276DT Diesel 5H22-11002-AB

€32.95

Free delivery: Sep 14 – 15

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Part no. 8W0959593E

Audi A4 B9 Front Door Control Module Unit Driver's Side 8W0959593E

€28.95

Free delivery: Sep 14 – 15

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Part no. A2059006822

Module Mercedes W205 Relay Body Control Module Unit SAM BCM A2059006822

€28.95

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Part no. 6809316

BMW F10 F20 F23 F30 Telematics Module Bluetooth Communications Control 6809316

€85.95

Free delivery: Sep 14 – 15

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Part no. A2075403434

PDC Wiring Mercedes W204 W207 Parktronic Parking Sensor Cable Rear A2075403434

€23.95

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Part no. 8E0857925G

Audi A3 8P TT 8J A4 B7 Ipod Interface Multimedia Storage Compartment 8E0857925G

€23.95

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Part no. A1648202715

Electrical Wiring Cable Mercedes W164 W251 Radio Media Interface A1648202715

€23.95

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Part no. 6865245

BMW X5 F15 X6 F16 Power Steering Column Control Unit Module 6865245

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1K0959654

Audi A3 8P Steering Wheel Position Angle Sensor Control Unit Module 1K0959654

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7464634

BMW X1 F48 Control Unit Remote Backrest Unlocking 7464634

€23.95

Free delivery: Sep 14 – 15

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Part no. 5Q0959392B

Audi A3 S3 8V Door Control Module Front Passenger Side Left N/S 5Q0959392B

€23.95

Free delivery: Sep 14 – 15

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Part no. 7L5971095C

Porsche Cayenne 9PA 955 Front Bumper PDC Park Sensor Wiring Harness 7L5971095C

€37.95

Free delivery: Sep 14 – 15

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Part no. A2469007018

Mercedes W176 W246 Display Screen Radio Navigation Sat Nav Unit A2469007018

€61.95

Free delivery: Sep 14 – 15

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Part no. 1439743

BMW E46 X5 E53 E60 E65 X3 E83 Z4 E85 Z3 Cable Alternator Starter 1439743

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009004434-2

Parking Control Module Mercedes C118 W177 W247 PDC Bluetooth Unit A0009004434

€142.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5N0035342G

VW Volskwagen Polo 6R Multimedia Electronic ECU Control Unit Module 5N0035342G

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6R0971537F

VW Volkswagen Polo 6R Negative Battery Terminal Cable Wiring 6R0971537F

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7S7T-14B056-AD

Ford Mondeo Mk4 Air Module Control Unit ECU 7S7T-14B056-AD

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9325917

Door Cable BMW F36 Rear Left Right N/O/S Wiring Harness 9325917

€27.95

Free delivery: Sep 14 – 15

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Part no. A4519060480

Smart ForTwo C451 Radio Stereo Audio Head Unit CD Bluetooth Bosch A4519060480

€227.95

Free delivery: Sep 14 – 15

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Part no. 6R0971235C

VW Volkswagen Polo 6R Negative Battery Terminal Cable Wiring 6C0971235A

€23.95

Free delivery: Sep 14 – 15

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Part no. 8T0907468M

Audi A5 8T Central Gateway Module ECU Control Unit Lear 8T0907468D

€23.95

Free delivery: Sep 14 – 15

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Part no. 9261598

BMW F20 F21 F22 Rear Bumper PDC Ultrasonic Sensor Valencia Orange Metallic B44

€23.95

Free delivery: Sep 14 – 15

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Part no. 6882963

Air Module BMW F01 F02 LCI F07 GT F10 F11 F13 ECU ICM Control Unit 6882963

€32.95

Free delivery: Sep 14 – 15

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Part no. A2118702626

Mercedes W211 CLS C219 Air Module SRS Control Unit ECU A2118702626

€23.95

Free delivery: Sep 14 – 15

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Part no. 9231466

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

€23.95

Free delivery: Sep 14 – 15

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Part no. 9350313

BMW F90 M5 G11 G30 Fuse Box Power Distribution Unit Front Right O/S 9350313

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6R0971226A

Volkswagen VW Polo 6R Negative Battery Terminal Cable Wiring 6R0971226A

€32.95

Free delivery: Sep 14 – 15

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Part no. 6915047

BMW E46 E39 E38 E83 E53 E85 E86 Control Unit Voice Input System Module 6915047

€23.95

Free delivery: Sep 14 – 15

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Part no. 9226326

BMW E81 Body Control Module Control Unit L2 PL2RR JBBFE III ECU 9226326

€23.95

Free delivery: Sep 14 – 15

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Part no. 6930302

BMW E60 E61 E63 E64 Actuator Ventilation Motor Heater Right O/S 6930302

€23.95

Free delivery: Sep 14 – 15

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Part no. 9177118

CD Changer BMW X5 E70 X6 E71 Mini R55 R56 R57 6 Disc Changer Unit 9177118

€37.95

Free delivery: Sep 14 – 15

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Part no. 9352750

BMW X6 F16 F86 Camera Kafas Front Windscreen Camera Module 9352750

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4H0959792G

Audi A8L 4H Front Door Control Module Left N/S Unit ECU 4H0959792G

€23.95

Free delivery: Sep 14 – 15

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Part no. 6C1T-14A120-AD

Ford Transit Mk7 Starter Motor Wiring Cable 2.2 TDCi 6C1T-14A120-AD

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7L0937401B

Audi Q7 4L Power Distribution Box Control Unit Plus Housing Cover 7L0937401B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8582279-3

BMW F20 F30 F32 120d 320d 420d Diesel N47N 184HP ECU Kit DDE 8582279 Keys FEM

€222.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2721535591

Mercedes A209 Engine Control Unit Module ECU 231HP Petrol Automatic A2721535591

€284.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2118209126

Mercedes-Benz C E Class W203 W211 Alarm Anti Theft System Control Module Unit

€23.95

Free delivery: Sep 14 – 15

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Part no. A2045400440

Battery Bracket Mercedes W204 W207 Battery Mount Support Holder A2045400440

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 3448466

Mini Cooper R55 R56 Control Unit Module Passive Go 3448466

€28.95

Free delivery: Sep 14 – 15

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Part no. 8678974

Engine Cable BMW F40 X1 F48 Mini F55 F56 Injector Wiring Loom Harness 8678974

€42.95

Free delivery: Sep 14 – 15

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Part no. A2709060700

Mercedes W176 Starter Motor 12V Bosch M270 Petrol Engine A2709060700

€23.95

Free delivery: Sep 14 – 15

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Part no. 9240945

Mini Cooper D R55 R56 R57 R60 LCI Electrical System Fuse Distribution Box

€23.95

Free delivery: Sep 14 – 15

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Part no. 9172019

BMW 5 Series E60 E60N E61 E61N LCI Airbag ECU Control Unit Module 9172019

€23.95

Free delivery: Sep 14 – 15

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Part no. 9266384

BMW 5 Series F10 F11 LCI Boardmonitor Central Information Display 7" 9266384

€56.95

Free delivery: Sep 14 – 15

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Part no. 5Q0937084AC

Skoda Octavia 5E Audi A3 8V Body Control Comfort Module BCM ECU Unit 5Q0937084AC

€23.95

Free delivery: Sep 14 – 15

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Part no. 4M0907566B

Audi A4 B9 A5 S5 F5 Lane Change Assist Module Control Rear Right O/S 4M0907566B

€237.95

Free delivery: Sep 14 – 15

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Part no. 04L906021BQ

Audi A4 B8 Engine Control Unit Module ECU 2.0 TDI CNHC 163HP 04L906021BQ

€56.95

Free delivery: Sep 14 – 15

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Part no. 6901469-3

Relay BMW E60 E87 E90 F10 F30 4 Pin Tyco Set Black 6901469

€23.95

Free delivery: Sep 14 – 15

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Part no. 5R3919294

Volkswagen Golf CD1 Park Parking Assist PDC Distance Control Module 5R3919294

€37.95

Free delivery: Sep 14 – 15

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Part no. A1679000111

Mercedes W167 W177 Radio Stereo Player Sat Nav Head Unit ECE A1679000111

€284.95

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Part no. A9075401205

Mercedes W907 Starter Wiring Battery Alternator Cable Harness Loom A9075401205

€32.95

Free delivery: Sep 14 – 15

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Part no. 5Q0907530N

Skoda Octavia 5E Gateway Control Module Unit ECU 5Q0907530N

€23.95

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Part no. 059911024P

Audi A6 C7 A7 4G 2.0 TDI Starter Motor Diesel Engine Denso 059911024P

€42.95

Free delivery: Sep 14 – 15

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Part no. A0015424623-1

Mercedes-Benz C E A207 W204 W212 1 Front Parking PDC Display Panel A0015424623

€23.95

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Part no. A2129005200

Seat Module Mercedes W204 W212 Memory Control Unit Driver's Side A2129005200

€56.95

Free delivery: Sep 14 – 15

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Part no. A0009003713

Mercedes W205 Tyre Pressure Control Module Unit A0009003713

€23.95

Free delivery: Sep 14 – 15

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Part no. A2108207626

Mercedes-Benz C E W202 W210 Front Right Door O/S Control Module A2108207626

€23.95

Free delivery: Sep 14 – 15

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Part no. 8574352

BMW X1 E84 20d 20dX 184HP N47N Engine Control Unit ECU DDE 8574352 Automatic

€89.95

Free delivery: Sep 14 – 15

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Part no. A2465402150

Mercedes-Benz A B Class W176 W246 Diesel Fuse Box Relay Unit A2465402150

€28.95

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Part no. A1668210351

Mercedes-Benz A CLA C117 W176 Airbag Impact Crash Sensor A1668210351

€23.95

Free delivery: Sep 14 – 15

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Part no. 9237055

Antenna Diversity BMW F07 GT Control Unit Module Aeral Amplifier 868 MHZ 9237055

€23.95

Free delivery: Sep 14 – 15

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