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 W907 315CDI OM654.920 Engine Unit Module ECU Kit A6549009400 BCM + Key

€474.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. AV4T-14A076-AA

Ford Kuga Mk1 Engine Bay Fuse Box Cover Lid Top Plate AV4T-14A076-AA

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4K0959663

Voltage Converter Audi A4 B9 A6 C8 Stabilizer Control Module Unit ECU 4K0959663

€108.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8648840

BMW F45 F48 F49 Mini Cooper F60 Earth Ground Cable 8648840

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1725402209

Mercedes R172 Glove Box Wiring Loom A1725402209

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8375964

BMW 5 7 X5 Series E38 E39 E53 Xenon Headlight Aim Control Unit Module 8375964

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8510221-10

BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8510221 CAS3 + Key

€256.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1330901500

Mercedes W176 A45 C117 CLA45 Engine Sound Generator Valve A1330901500

€142.95

Free delivery: Sep 14 – 16

If paid before 14:00

Part no. LR174461

Range Rover Velar L560 Rain Sensor Module Control Unit P8D2-17D547-CA

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8572874-1

BMW F10 F11 525d N47S1 218HP Engine ECU DDE Kit CAS4 Key 8572874 Automatic

€854.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. M8D2-14407-AB

Range Rover Evoque L551 AdBlue Tank Wiring Loom Harness Cable M8D2-14407-AB

€51.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9335300

BMW 1 Series F20 LCI Front Door Wiring Loom Harness Passengers Side 9335300

€23.95

Free delivery: Sep 15 – 16

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Part no. 7174403-5

BMW E92 Coupe Rear Light Lamp Plug Socket Wiring Left N/S 6984754

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5G0907159D

VW Volkswagen Golf R 5g BA BQ Impact Sound Control Unit Module ECU 5G0907159D

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7928596

BMW G05 G20 G21 G30 Stereo Sound Amplifier Module Control Unit ECU 7928596

€151.95

Free delivery: Sep 15 – 16

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Part no. A1695450046

Mercedes-Benz A C W169 W204 Battery Relay Module Box A1695450046 A0035422619

€32.95

Free delivery: Sep 15 – 16

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Part no. 8T8945096D-2

Audi A5 8T Tail Light Lamp Side Panel Rear Right O/S Harness Wire 8T8945096D

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 52181203-1

Vauxhall Movano Fiat Ducato Battery Current Sensor Control Terminal 52181203

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. JPLA-14D617-CB

Range Rover Evoque L551 Front Door Control Module Passenger Side JPLA-14D617-CB

€56.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8K0927710C

Audi A4 B8 A5 8T Steering Column Connector Plug Socket 8K0927710C

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 1529431-1

Ford Mondeo Mk4 Starter Motor 2.2 TDCI Diesel Engine 6G9N-11000-GC

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4H0907145

Audi A6 C7 Air Suspension Level Height Adjustment Module Control Unit 4H0907145

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2215400210

Mercedes W221 Door Wiring Cable Rear Right O/S Door Loom Harness A2215400210

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5A1DC85

BMW G01 G08 G11 G12 Wireless Charger Console Phone Charging Module 5A1DC85

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1729002301

Mercedes SLK R172 Door Control Unit Module Front Left N/S A1729002301

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2514402009

Mercedes W164 Front Left Right N/O/S Door Wiring Loom Harness A2514402009

€23.95

Free delivery: Sep 15 – 16

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Part no. A2198203326

Mercedes C219 Rear Door Control Module Unit Left N/S A2198203326

€23.95

Free delivery: Sep 15 – 16

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Part no. A1715409506

Mercedes R171 Window Control Switch Wiring Cable Driver Side A1715409506

€23.95

Free delivery: Sep 15 – 16

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Part no. 03L906018SK-1

Audi A4 B8 2.0 TDI CJCD 150HP Engine ECU Kit 03L906018SK Key Lock Automatic

€51.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7182206-2

BMW F01 F02 F03 F04 Rear Tail Light Lamp Wiring Harness Plug Right O/S 7182206

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A6519000603-1

Mercedes W205 C205 BlueTec OM651.921 Engine Control Unit ECU Kit A6519000603 Key

€284.95

Free delivery: Sep 15 – 16

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Part no. 6R0907530C

Seat Ibiza 6J Central Gateway Module Control Unit 6R0907530C

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 6G9T-14K131-CB

Ford Galaxy Mk2 Fuse Box Relay Fusebox Control Unit Module 6G9T-14K131-CB

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 3V0971693AA

Skoda Superb 3V Door Wiring Harness Cable Loom Rear Left N/S 3V0971693AA

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8574091-6

BMW F10 F11 520d N47N 184HP Engine ECU Kit Unit DDE 8574091 CAS4 + Key Manual

€170.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8510281

Engine Wiring BMW F30 F31 F32 F36 330d 430d N57N Loom Harness Cable 8510281

€113.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2465406607

Positive Cable Mercedes W176 W246 Battery Lead Plus Pole Red A2465406607

€28.95

Free delivery: Sep 15 – 16

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Part no. 6812244

BMW F45 F46 Wiring Harness Door Cable Loom Rear Right O/S 6812244

€37.95

Free delivery: Sep 15 – 16

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Part no. 4M0010006B

Audi Q7 4M Fuse Box Battery Terminal Cover Housing 4M0010006B

€23.95

Free delivery: Sep 15 – 16

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Part no. 6957807

BMW X3 E83 Amplifier For Stereo System Harman/Becker AMP 6957807

€23.95

Free delivery: Sep 15 – 16

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Part no. 5A243F5

BMW F70 G60 U06 Rear Ultrasonic Sensor Parking PDC Portimao Blue C31 5A243F5

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 2Q0937615A-1

Audi A1 GB VW Transporter T6 Fuse Relay Box Power Supply Unit 2Q0937615A

€23.95

Free delivery: Sep 15 – 16

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Part no. 9805533

Mini R60 Rear PDC Ultrasonic Parking Sensor Royal Grey Metallic 9805533

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1729001506

Mercedes R172 Convertible Roof Control Module ECU A1729001506

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A6401503634-2

Mercedes W169 W245 OM640.940 109HP Engine Control ECU Kit A6401503634 Automatic

€227.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9290357

BMW F10 F20 F22 F30 Navigation Head Unit Harman Sat Nav Unit High 9290357

€522.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2218702286

Mercedes W221 Front Seat Heater Control Unit Module ECU A2218702286

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5M5T-14B192-CA

Range Rover L538 Ford Transit Custom Relay 4-Pin Black 12V 40A 5M5T-14B192-CA

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1695450140

Mercedes A B Class W169 W245 Holder Bracket Engine Control Unit A1695450140

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5A13473

BMW G20 F40 Control Unit Module Air Conditioning System 5A13473

€51.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0005400502

Mercedes W212 W221 W447 W906 Adblue Injector Wiring Cable Loom A0005400502

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 198393-01

Volkswagen Polo 6R Light Lamp Control Module Unit ECU 198393

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 2265722

Ford Fiesta Mk7 Focus Mk3 Alternator Generator 14V 120A 1.6 Petrol AV6N-10300-HA

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8512499-8

BMW E87 E90 LCI N47 118d 318d 143HP Diesel ECU Kit DDE 8512499 CAS3 + Key Manual

€151.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4L0971235

Audi Q7 4L Negative Battery Terminal Cable Lead 4L0971235

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8U0971030AF

Audi Q3 8U Front Door Wiring Harness Loom Cable Passenger Side 8U0971030AF

€32.95

Free delivery: Sep 15 – 16

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Part no. 3D0941329A

Volkswagen Passat B7 Headlight Cornering Module Control Unit 3D0941329A

€47.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 6938246

BMW E87 Wiring Loom Harness Set Rear Door Left Right N/O/S 6938246

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7678321

BMW X4 F26 Harness Wiring Cable Loom 7678321 767832-113

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 2GA971694A

VW Volkswagen T-Roc Mk1 Rear Door Cable Harness Wiring Loom Right O/S 2GA971694A

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9362351-1

Mini F55 F56 BMW F45 i3 I01 Head Unit Radio DAB Media Player Unit 9362351

€94.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0038212751

Mercedes-Benz M S W221 ML W164 Airbag Impact Crash Sensor Door A0038212751

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2079001100

Door Module Mercedes C207 W207 Front Left N/S Control Unit ECU A2079001100

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9210120

BMW F07 GT Door Wiring Loom Cable Harness 9210120

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8585641

Engine Wiring BMW F20 F21 F30 F31 N47N Diesel Loom Harness Cable 8585641

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8630168

BMW 3 F30 LCI 330e Hybrid Charging Control Unit Bracket Holder Mount 8630168

€37.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. BS7T-14K131-AA

Land Rover Discovery Sport L550 Fuse Relay Box BS7T-14K131-AA

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8W8971035R

Audi A5 F5 Door Trim Panel Harness Wiring Wire Front Driver's Side 8W8971035R

€80.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5B3FDF9

BMW F74 Gran Coupé Pedestrian Protection Sensor PTS 5B3FDF9

€75.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1775400358

Mercedes W177 Ground Line Cable Wire A1775400358

€51.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 09G927750CA

Audi TT 8N Automatic Gearbox Module Control Unit ECU 09G927750CA

€142.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4M5T-14B056-BF

Ford Focus Mk2 Airbag Control Module Unit ECU Bosch 4M5T-14B056-BF

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5Q0907651

Seat Leon Mk3 5F Front Crash Impact Sensor 5Q0907651

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9270490

BMW X5 F15 Antenna Aerial Diversity Trap Circuit Control Module 9270490

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9365819

BMW X5 F15 Wiring Rear Right O/S Door Harness Loom 9365819

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8W1907064BC

Audi A4 B9 Body Control Module BCM Comfort Control Unit Power Supply 8W1907064BC

€85.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8D0972695H

Audi Q3 8U OBD Plug Wiring Harness Cable 8D0972695H

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9856130

BMW G42 U06 X1 U11 Antenna Amplifier Suppression Filter Aerial Diversity 9856130

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4H0937118

Audi A8 S8 4H D4 Fuse Relay Box Lower Housing Cover Trim 4H0937118

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8386674

BMW 3 5 Series E46 F30 G30 G31 Battery Cable Negative Cable Minus Cable 8386674

€26.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. ET76-13404-AB-2

Ford Transit Courier Rear Tail Light Wiring Cable Right O/S ET76-13404-AB

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1695457740

Mercedes-Benz A B W169 W245 Bracket Starter Alternator Control Unit A1695457740

€23.95

Free delivery: Sep 15 – 16

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Part no. 4H0971192B

Audi A8 D4 Reversing Camera Wiring Harness Cable Adapter Connector 4H0971192B

€47.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 6868044

BMW F01 F02 F04 Handbrake Parking Brake Control Module Unit 6868044

€165.95

Free delivery: Sep 14 – 16

If paid before 14:00

Part no. 8638198-6

BMW F20 F30 120i N13 177HP Engine ECU Kit DME 8625241 FEM 2 Keys Automatic

€484.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2095453140

Fuse Box Holder Mercedes W209 Control Unit Mount Bracket CLK A2095453140

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1635407405

Mercedes ML W163 Front Electric Seat Adjust Wiring Harness Cable A1635407405

€47.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4H0907063CE

Audi A6 C7 Body Control Module BCM ECU 3.0 TDI Quattro CDUD 4H0907063CE

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 982972155

Porsche 718 Boxster 982 Front Wiring Cable Harness Left N/S 982972155

€80.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 03L906022HM

Volkswagen Tiguan 5N 4motion 2.0 TDI CBBB 170HP Engine Module ECU 03L906022HM

€137.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7PP907064LA

Porsche Macan 95B Body Comfort Module Control Unit 7PP907064LA

€237.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7P5941572A

Volkswagen Golf Mk7 5G Headlight Ballast Module Left Right N/O/S 7P5941572A

€61.95

Free delivery: Sep 15 – 16

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Part no. GK21-12A650-CA-3

Ford Transit Custom Engine Control ECU 130HP 2.0 YMFS Manual GK21-12A650-CA

€279.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8W0915459K

Audi A4 B9 A5 F5 Battery Overload Switch Housing 8W0915459K

€66.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0045467740

Mercedes W447 Drive Train Sensor Can Distributor A0045467740

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4G5971030EF

Audi RS6 C7 Door Wiring Front Left N/S Door Harness Loom 4G5971030EF

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5Q0035570-1

Volkswagen Golf 5G Radio Antenna Noise Signal Disturbance Suppressor 5Q0035570

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2515404206

Mercedes W251 Rear Bumper Parktronic Wiring Loom Parking Sensor A2515404206

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 9252331

BMW F10 ECU Body Control Module Junction Box V2 PL6 JBBFE III 9252331

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

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