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 W169 W245 Relay Control Unit Bracket Mount Holder Cover A1695458140

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0971679M

Audi Q5 8R Glove Box Storage Compartment Wiring Loom Light Cable 8R0971679M

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0803219C

Battery Clamp VW Golf 8 CD1 Audi A3 8Y Battery Base Bracket Holder 5Q0803219C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1732742

Ford Fiesta Mk7 Engine Starter Motor 1.25 1.4 1.6 Petrol 1732742 8V21-11000-BE

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W2035043E-1

Audi A4 B9 MMI Multimedia Sat Nav Navigation Control Head Unit 8W2035043E

€474.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2189006806

Mercedes W207 Harman Control Unit Module Amplifier Premium Sound A2189006806

€631.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A9064407409

VW Crafter 2E Mercedes Sprinter W906 Earth Ground Cable Wiring Loom A9064407409

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5WA919298

Audi S3 8Y PDC Parking Distance Assist Sensor Module Control Unit 5WA919298

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. CV1T-14B532-BE

Ford B-Max Door Control Unit Module Rear Left Right N/O/S CV1T-14B532-BE

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L906018LA-1

Audi A6 C7 2.0 TDI CGLC 177HP Engine Unit ECU Kit 03L906018LA 2 Keys Ignition

€189.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. CPLA-14A375-AD

Range Rover L405 Voltage Converter Module Auxiliary Battery Unit CPLA-14A375-AD

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9008087030

Toyota Avensis T270 4-Pin Multi-Use 12V Grey Relay Denso 9008087030

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9812872-2

Mini Paceman R61 Rear Lamp Tail Light Taillight Cable Wire Right O/S 9812872

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. UH42-19C063-BC

Range Rover L322 TV Tuner Hybrid Module Unit ECU 3.6 Diesel 368DT UH42-19C063-BC

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. LK72-19H406-BE

Land Rover Discovery Sport L550 Front Camera Module Control Unit LK72-19H406-BE

€85.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6C0919603B-1

Volkswagen Polo 6C 6R Radio Control Navigation Multimedia Display 6C0919603B

€89.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8679681

BMW F45 i3 i01 Mini F60 High Voltage Connector 8679681

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 55L6E05B4

Range Rover Sport L494 Fuse Relay Box Fusebox 3.0 Diesel 55L6E05B4

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1718206026

Mercedes R171 Front Door Control Module Right O/S A1718206026

€137.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7165563

BMW 5 E60 E61 Headlight Headlamp Front Left N/S Lamp Plug Input Connector

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1C0909601A

Skoda Fabia Mk1 6Y VW Passat B5 Air Control Unit ECU Module 1C0909601A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2049003509

Mercedes W204 S204 Radio Head Unit Sat Nav CD Player 2049003509

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. K8D2-14N073-AC

Range Rover Evoque L551 Fuse Box Electrical Module Unit Hybrid K8D2-14N073-AC

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0009002010

Transmission Module Mercedes C117 AMG Petrol OM133 Gearbox Control A0009002010

€151.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1649100075-1

Mercedes ML W164 Lumbar Module Front Seat Lumbar Control Unit A1649100075

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. GK2T-10C652-AA

Ford Transit Custom Battery Terminal Lead Cable Harness GK2T-10C652-AA

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0035341E

VW Volkswagen Passat B7 Touran 1T Multimedia Interface Module Socket 5N0035341E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0927165F

Volkswagen Tiguan 5N Golf Mk7 Audi A3 8V Fuse Box Cover Panel 5Q0927165F

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. GV6T-14A073-DE

Ford Transit Connect Mk2 Focus Mk3 Body Control Module BCM ECU GV6T-14A073-DE

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2139007105

Air Module Mercedes W213 S213 W238 SRS Control Unit ECU A2139007105

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8509910

BMW X3 F25 X4 F26 Engine Electronics Control Unit Box Cover Trim 8509910

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F1941824

Audi Q7 4L Fuse Box Control Module Connector Plug Socket Wiring Loom 4F1941824

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. JS7A-12A650-BFA

Ford Mondeo Mk5 Engine Control ECU 2.0 Petrol 186HP JS7A-12A650-BFA Automatic

€142.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7559178-1

BMW E60 E90 E91 325i 525i N52 218HP Engine ECU Kit DME 7559178 CAS2 + Key Manual

€284.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2146849

Ford Transit Courier Fiesta Mk8 Engine Starter Motor 1.5 Diesel H1BT-11000-EC

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055408040

Mercedes W205 Front Door Electric Wiring Harness Loom Cable Left N/S A2055408040

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4L1971073D

Audi Q7 4L Front Frame Air Module Wiring Harness Cable 4L1971073D

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6919759

BMW E65 E66 E67 Control Unit Front Centre Console Module 6919759

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W6971104T

Audi A5 F5 Rear Bumper PDC Parking Sensor Wiring Loom Harness 8W6971104T

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8583653-1

Engine Wiring Loom BMW F10 F30 F31 LCI N57N Wiring Harness Glow Module 8583653

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8573260-10

BMW F20 F21 116d Diesel N47N 116HP ECU Kit DDE 8573260 + Keys + FEM Manual

€189.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. GV4T-14B321-AB

Ford Kuga C520 Air Unit Restraint Control Module ECU GV4T-14B321-AB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5E5945112A-2

Skoda Octavia Mk3 Tail Light Lamp Rear Right O/S Harness Loom Wire 5E5945112A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L911021

Audi A5 8T 2.0 TDI CNHA Diesel Engine Motor Starter 04L911021

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K5035225D

Audi A6 C8 Aerial Antenna Amplifier Control Unit Module 4K5035225D

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1513396

Mini Cooper One S R50 R53 Door Cable Harness Wiring Loom Left N/S 1513396

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1779006715

Mercedes W177 Wireless Charger Centre Console Phone Charging Module A1779006715

€99.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BJ32-14C676-AA

Land Rover Discovery Sport L550 Crash Impact Sensor Module BJ32-14C676-AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 861600H020

Toyota Aygo B1 Front Side Door Speaker Audio System Module Right O/S 861600H020

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3C4971693QB

Volkswagen Passat B6 Door Wiring Loom Harness Rear Left N/S 1.6 TDI 3C4971693QB

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0941029AL-2

Audi A5 S5 8T Xenon Headlight Headlamp Wiring Cable Adapter Left N/S 8T0941029AL

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9P1919606G

Porsche 911 991 Cayman 982 Sat Nav Multimedia Head Unit Screen 9P1919606G

€1,139.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9147869-1

BMW E60 E61 Radio Professional Navigation System Controller Head Unit 9147869

€279.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 8M5T-19A391-AD

Ford Ranger WILDTRAK Mk6 Microphone Speakerphone Handsfree Center 8M5T-19A391-AD

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0035225C

Audi A5 8T S5 8T Aerial Antenna Amplifier Booster Rear Right O/S 8T0035225C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7928682

Radio Receiver BMW F40 F44 G20 G26 Radio Remote Control Unit 434 MHZ 7928682

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. HPLA-14A439-AA

Range Rover Sport L494 Rear Power Module Cable Wiring Harness HPLA-14A439-AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. M8A2-14E100-BB

Land Rover Range Rover Velar L560 AdBlue Tank Wire Harness Loom M8A2-14E100-BB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9118263

BMW F01 F02 F03 F10 Antenna Amplifier Module Trap Circuit 9118263

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7359019-3

BMW F20 F21 LCI Light in Trunk Lid Left N/S Rear Lamp Wire Harness Cable 7359019

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9291955

BMW F20 Front Door Wiring Harness Cable Driver Side 9291955

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7553166-4

BMW E92 Engine Control Unit ECU 2.5 Petrol 218HP N52B25 Automatic 7553166 Kit

€455.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2315828

BMW F11 F20 F21 F33 E81 E82 E87 E88 Electronic Module Adapter Device 2315828

€94.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. GK21-12A650-CA-1

Ford Transit Custom Engine Control ECU 105HP 2.0 YFL6 Manual GK21-12A650-CA KIT

€522.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8485065

BMW G11 G12 G14 G15 G16 G30 G31 G32 G38 Positive Battery Cable Wire 8485065

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G8971693A

Audi A7 4G8 Rear Door Wiring Harness Connector Loom Left Right N/O/S 4G8971693A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A4539050400

Smart Fortwo 453 Front Acceleration Sensor B-Pillar Left Right N/O/S A4539050400

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5A4EE45

BMW i4 G26 Rear Battery Holder Bracket Mount Support Screw 5A4EE45

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G5971036M

Audi A6 C7 Door Wiring Loom Harness Cable Wire Front Passenger Side 4G5971036M

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0971688D

Audi Q5 8R Door Wiring Harness Loom Cable Connector Rear Right O/S 8R0971688D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2215408508

Mercedes W221 Door Harness Wiring Loom Rear Left N/S A2215408508

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1377238080

Citroën Relay Fiat Ducato Roof Aerial Antenna Cable Wire 1377238080

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F0907247A

Audi Q7 4L Keyless Entry Amplifier Control Box Module Aerial Antenna 4F0907247A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8X0971687C

Audi A1 8X Rear Door Harness Left N/S Wiring Loom Cable 8X0971687C

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2GA035577

Volkswagen T-Roc Aerial Antenna Amplifier Module Unit Right O/S 2GA035577

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0035420419

Mercedes W177 W205 W247 Relay Fuse Unit Module 4 Pins Black A0035420419

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4M0971227S

Audi Q7 4M 3.0 TDI Battery Earth Cable Lead Negative Wiring 4M0971227S

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. JB3T-19K351-AC

Ford Ranger Wildtrak Mk6 Aerial Antenna Amplifier Control Unit JB3T-19K351-AC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A4519017600

Smart Fortwo 451 Air Bag Control Module Unit ECU A4519017600

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0971030BG

Audi Q5 8R Front Door Wiring Loom Harness Cable Passenger Side 8R0971030BG

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6461509577

Mercedes C W204 ECU Key Ignition Switch Lock 2.1 Diesel 122HP A6461509577

€132.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775455100

Mercedes W177 AMG Antenna Amplifier Control Unit Module A1775455100

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775408027

Mercedes C118 W177 W247 M282 Battery 48V Wiring Harness Cable Loom A1775408027

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 861200F060

Toyota Verso R2 Radio Stereo Audio CD Player Head Unit 86120-0F060

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8X23-10E998-AA

Jaguar XF X250 Licence Plate Number Plate Light Wiring Harness 8X23-10E998-AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0941030AL-2

Audi A5 S5 8T Xenon Headlight Headlamp Wiring Cable Right O/S 8T0941029AL

€23.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 9289583

BMW X1 E84 Display Screen Dashboard Navigation Monitor On-Board CID 6,5" 9289583

€170.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9380323

BMW F10 Steering Column Module Electronic Control Unit ECU 9380323

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. DWI500033

Range Rover Sport L320 Bettery Box Cover Support Tray Left N/S DWI500033

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. LR070399

Range Rover L405 Starter Motor Actuator Module Unit 4.4 Diesel LR070399

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6394401108

Mercedes Vito W639 Front Bumper PDC Wiring Parking Sensor Harness A6394401108

€61.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0971358

Audi A6 C8 Hybrid High Voltage Battery Earth Line Negative Cable 4K0971358

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6957761

BMW 5 6 Series E60 E61 E63 Passenger Door Airbag Control Module 6957761

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4E0035785F

Audi S4 B8 MMI Multimedia AMI Interface Music Control Module Unit 4E0035785F

€132.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0941774A-1

Audi Q3 8U LED Headlight Headlamp Plug Socket Wiring Cable Right O/S

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8713127-1

BMW F90 M5 F91 M8 G30 Fuse Box Power Distribution Control Unit Box Rear 8713127

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9252690

BMW F12 f13 Interior Active Sound Module Control Unit Mount Bracket 9252690

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1725452540

Mercedes R172 Battery Holder Bracket Tray Cover Panel A1725452540

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1175403901

Mercedes C117 X117 Front Bumper Parking Sensor Wiring Loom Harness A1175403901

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

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