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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Audi Q2 GA Rear Door Wiring Loom Harness Left Right N/O/S 81A971687J

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7943752

BMW X5 F15 F20 F21 F22 F23 F30 F45 F46 Electric Seat Control Module ECU 7943752

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059000017

Mercedes W176 W205 W212 Telematics Communication Control Module ECU A2059000017

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6519007003-5

Mercedes W176 A200 CDI Engine ECU Kit OM651 136HP A6519007003 Automatic

€189.95

Free delivery: Nov 12 – 13

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Part no. 8589145-21

BMW F20 LCI 116d B37 Engine 115 HP Module ECU Kit DDE 8589145 Manual

€332.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5K0971104B

Volkswagen Golf Mk6 Rear Tailgate Licence Plate Lighting Wiring Cable 5K0971104B

€23.95

Free delivery: Nov 12 – 13

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Part no. A0009061705

Mercedes W205 C63 Petrol Engine 14V 200A Alternator Generator Unit A0009061705

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5B9FD84

Mini F65 F66 F67 Garmin Head Unit Audio Navigation 5B9FD84

€332.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AV6N-10C679-BD

Ford C-Max Mk2 Negative Battery Terminal Cable Electrical Wiring AV6N-10C679-BF

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 95B955941D

Porsche Macan 95B PDC Parking Sensor Wiring Loom Front Bumper 95B955941D

€165.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2118703126

Headlight Module Mercedes C209 W211 CLS C219 Level Control Unit ECU A2118703126

€23.95

Free delivery: Nov 12 – 13

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Part no. 6R0937085D

Volkswagen Polo Mk5 Body Control Module Unit BCM Controller 6R0937085D

€75.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 420907560-1

Audi R8 42 Engine Control Unit ECU BCM Key 4.2 Petrol 419HP BYH 420907560 Kit

€3,609.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8635816

Engine Wiring BMW F20 F30 F31 LCI B38 Automatic Gearbox Loom Harness 8635816

€61.95

Free delivery: Nov 12 – 13

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Part no. 4E0907279Q

Audi A8 D3 Body Control Comfort Unit Module BCM Convenience Unit ECU 4E0907279Q

€23.95

Free delivery: Nov 12 – 13

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Part no. CX23-10724-AD

Jaguar Xf X250 Fusebox Support Bracket Mounting Panel Tray CX23-10724-AD

€23.95

Free delivery: Nov 12 – 13

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Part no. 5LA907357H

Audi A6 C6 Front Lamp Headlight Range Control Module Unit ECU 5LA907357H

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2468200035

Mercedes-Benz A-Class W176 Mikrophone Roof Control Module A2468200035

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AH22-18B955-AC

Land Rover Discovery 4 L319 Dashboard Information Display Screen AH22-18B955-AC

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8V4971687E

Audi A3 8V Sportback Door Wiring Loom Harness Rear Left Right N/O/S 8V4971687P

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F0035727

Audi A5 8T Multimedia Interface HSB Hub Connection Port Wire Loom 4F0035727

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. LJD6018AA

Jaguar XK8 X100 XJ X308 Automatic Rain Sensor ECU Control Module LJD6018AA

€23.95

Free delivery: Nov 12 – 13

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Part no. 31419543

Volvo V40 Engine Starter Motor Unit 2.0 Diesel Engine 31419543

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7210575-2

BMW F06 F12 F13 Rear Lamp Tail Light Side Panel Wiring Harness Left N/S 7210575

€23.95

Free delivery: Nov 12 – 13

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Part no. 5H22-18K891-AA

Land Rover Discovery 3 L319 Aerial Antenna Amplifier 5H22-18K891-AA

€23.95

Free delivery: Nov 12 – 13

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Part no. 8598806-2

BMW X3 F25 20dX Diesel B47 190HP Engine Module ECU Kit DDE 8598806 Key CAS4

€427.95

Free delivery: Nov 12 – 13

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Part no. 05L907309

Audi A4 B9 A5 F5 30 TDI DTNB 136HP Engine Control Unit ECU 05L907309 Automatic

€284.95

Free delivery: Nov 12 – 13

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Part no. 8321087

BMW 5 SERIES E60 ELECTRIC SEAT Height Adjust 0390203234 8321087

€24.95

Free delivery: Nov 12 – 13

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Part no. 9118111

BMW 1 Series E81 E82 Door Wiring Loom Harness 9118111

€23.95

Free delivery: Nov 12 – 13

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Part no. A2128300008

Fan Blower Mercedes W212 Comand Navi CD Control Unit Module Cooler A2128300008

€23.95

Free delivery: Nov 12 – 13

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Part no. A2185402110

Mercedes C218 USB AUX Socket Port Cable Harness Wire Cable A2185402110

€23.95

Free delivery: Nov 12 – 13

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Part no. A1669063901

Mercedes ML W166 Relay Module Box Under Rear Right Seat F4 A1669063901

€37.95

Free delivery: Nov 12 – 13

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Part no. 7N0937503A-1

Audi Q3 8U VW Scirocco Mk3 Relay Bracket Holder Box 7N0937503A

€23.95

Free delivery: Nov 12 – 13

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Part no. A0035420819

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. K8D2-14633-AAD

Land Rover Evoque L551 Rear Door Wiring Harness Loom Left N/S K8D2-14633-AAD

€51.95

Free delivery: Nov 12 – 13

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Part no. A2229002009

Mercedes W205 W222 Door Module Control Unit Rear Left N/S A2229002009

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0927165A

Volkswagen Golf R Mk7 Fuse Box Cover Housing Closing Element Bracket 5Q0927165A

€23.95

Free delivery: Nov 12 – 13

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Part no. A2075404207

Mercedes W204 M276 NOX Sensor Adapter Right O/S Harness Wiring Cable A2075404207

€37.95

Free delivery: Nov 12 – 13

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Part no. A1765409502

Mercedes W176 Centre Console Wiring Harness Cable A1765409502

€23.95

Free delivery: Nov 12 – 13

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Part no. 191906383C-1

Audi VW Volkswagen Seat Skoda Relay Unit Module 4 Pins 191906383C

€23.95

Free delivery: Nov 12 – 13

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Part no. 5B3C455

BMW X1 U11 Starter Generator Alternator 1.5 Petrol Hybrid 5A96D93

€1,139.95

Free delivery: Nov 10 – 13

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Part no. 5N0971366AQ

Volkswagen Tiguan 5N Front Seat Wiring Loom Harness Right O/S 5N0971366AQ

€28.95

Free delivery: Nov 12 – 13

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Part no. 99661021101

Porsche Boxster 986 Fuse Box Relay Fuse Module Control Unit 99661021101

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9154329

Mini Clubman R55 Cable Wiring Loom Splitdoor Door Rear Right O/S 9154329

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5G0971584G

Volkswagen Golf Mk7 T-Roc R Steering Wheel Air Module Wiring Loom 5G0971584G

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6974370

Alarm System Unit BMW E60 E61 Ultra Sonic Module 6974370

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 059903015T-1

Audi Q7 4L A8 D3 D4 Water Cooled Alternator 190A Hitachi 059903015T

€66.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P5971384P

Porsche Cayenne S 92a Front Seat Adjustment Harness Left Right N/O/S 7P5971384P

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6922528

BMW 5 Series E61 E61N LCI Holder Bracket Additional Battery 6922528

€26.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AH22-14F041-BF

Range Rover Sport L320 BCM Fuse Box Body Control Module Unit AH22-14F041-BF

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0971250CE

Volkswagen Jetta A6 Manual Gearbox Earth Line 1K0971250CE

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4E0910110C-1

Audi A8 D3 A6 C6 6-Disc CD Changer Magazine Head Unit MMI 4E0910110C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055405393

Mercedes W205 Electrical Wiring Harness Loom A2055405393

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. GX73-12C520-FAF

Land Rover Discovery L550 2.0 204DT 180HP 4x4 Engine ECU GX73-12C520-FAF Manual

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 079971821

Audi S5 8T 4.2 FSI Ignition Coils Wiring Cable Guide Duct Cyl.5-8 079971822

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AV21-12A650-CD

Ford Fiesta Mk7 Engine Control Module ECU 1.25 SNJB 82HP AV21-12A650-CD Manual

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0862335B-1

Audi A4 B8 Bluetooth Multimedia Interface Control Module Unit ECU 8T0862335B

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5TRK0200UK

BMW X5 E53 GPS Vehicle Location Tracker Control Unit Module ECU 5TRK0200UK

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2059000146

Mercedes W205 Display Screen Instrument Cluster Speedo Meter Sat Nav A2059000146

€455.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1679004211

Door Module Mercedes W205 W213 W910 Front Right O/S Control Unit ECU A1679004211

€94.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. CONNECT-MK1-RADIO

Ford Transit Connect Erisin Radio Navigation Head Unit Android Display Screen 7"

€237.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7607454

Battery Insert BMW F13 F12 F06 Battery Crashpad Foam Insulator 7607454

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P0881879A

Porsche Cayenne 92A Front Seat Control Unit Lumbar Support 7P0881879A

€113.95

Free delivery: Nov 10 – 13

If paid before 14:00

Part no. 6934002

BMW 7 SERIES E65 E66 Door Wiring Harness Mod Carrier Front Left N/S 6934002

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2R83-14C724-AA

Land Rover Discovery 3 L319 Heated Seat Control Unit Module ECU 2R83-14C724-AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. GX63-15C859-DE

Land Rover Discovery Sport L550 PDC Parking Sensor Control Module GX63-15C859-DE

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6970890

BMW E65 E66 E67 Sensor B-pillar Air Module Left N/S 6970890

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2520983-1

Ford Kuga C394 Mk1 Radio Remote Control Key Fob Button 7S7T-15K601-EG

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6855951

BMW F10 F11 F13 F06 VDC Module Rear Suspension Level Control Unit Module 6855951

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0971030AE

Audi A4 B8 Front Door Wiring Loom Cable Harness Left N/S 8K0971030AE

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 14A919603

Volkswagen Crafter SY Touch Screen Radio MMI Display Screen 14A919603

€417.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BK2T-14B446-AF

Ford Transit Custom Front Panel Cable Wire Harness Loom BK2T-14B446-AF

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6394404906

Mercedes-Benz Vito W639 Loudspeaker Cable Wiring Loom Harness A6394404906

€23.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 9271214-1

BMW X3 F25 Front Bumper Parking Sensor Wiring Loom Harness 9271214

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7H1959843B

Volkswagen Transporter T5 T6 Roof Wiring Harness Grommet 7H1959843B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2215450601

Mercedes W221 Dashboard Fuse Box Front Left N/S Control Module A2215450601

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4L0971767

Audi Q7 4L Washer Bottle Reservoir Wiring Loom Harness 4L0971767

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1775405501

Mercedes W177 Door Harness Loom Cable Wiring Rear Left Right N/O/S A1775405501

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0971104C

Audi A4 B8 Rear Bumper PDC Parking Sensor Wiring Harness Loom 8K0971104C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2044401038

Mercedes C204 Front Door Electric Wire Harness Loom Cable Connector A2044401038

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8507909

BMW F20 F30 Wiring Harness Engine Transmission Module Diesel Manual N47N 8507909

€94.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7CP1-18C847-HA

Ford Kuga Mk2 C520 Aerial Antenna Amplifier Module Unit 7CP1-18C847-HA

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7L5971104E

Porsche Cayenne 9PA Rear Bumper Wiring Harness PDC Loom Cable 7L5971104E

€89.95

Free delivery: Nov 12 – 13

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Part no. A2661530891-1

Mercedes W169 A150 95HP M266.920 Engine ECU Kit Lock 2 Keys Barrel A2661530891

€265.95

Free delivery: Nov 12 – 13

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Part no. 5A5D3C0

Keyless Entry BMW F40 G20 G21 G30 G31 Comfort Access Antenna 5A5D3C0

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5E0971693D

Skoda Octavia MK3 Door Wiring Loom Harness Cable Wire Rear Left N/S 5E0971693D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 06E903143B

Audi A8 D3 Alternator Bracket Mount Holder Support 3.2 Petrol 06E903143B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8514735

BMW F20 F21 116d ed N47N 116HP Engine Control Unit Module ECU DDE 8514735 Manual

€170.95

Free delivery: Nov 12 – 13

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Part no. 3D0919473-1

Volkswagen Touareg Al PDC Parking Aid System Display Panel Unit 3D0919473

€23.95

Free delivery: Nov 12 – 13

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Part no. A2075402213

Mercedes C207 Door Cable Wiring Loom Front Right Door O/S A2075402013

€23.95

Free delivery: Nov 12 – 13

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Part no. 5A4FF07

BMW X1 U11 U06 U25 Antenna Amplifier DAB Module Control Unit 5A4FF07

€28.95

Free delivery: Nov 12 – 13

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Part no. 5H0907159A

Volkswagen Golf Mk8 R Impact Sound Control Module Unit 5H0907159A

€85.95

Free delivery: Nov 12 – 13

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Part no. 6836648

BMW G32 Adapter Cable Switch Door Center 6836648

€23.95

Free delivery: Nov 12 – 13

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Part no. FK72-7L195-AB

Land Rover Discovery L550 Vibration Damper Control Module Rear FK72-7L195-AB

€23.95

Free delivery: Nov 12 – 13

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Part no. 9X2Q-12A650-PAE

Land Rover Discovery L319 3.0 306DT Engine Control ECU 9X2Q-12A650-PAE Automatic

€56.95

Free delivery: Nov 12 – 13

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Part no. CCC-07-10Y

BMW E70 Car Radio Navigation Display Screen 10.25" Android 4+64 4G CP CCC-07-10Y

€142.95

Free delivery: Nov 12 – 13

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Part no. 06M907309G-2

Audi A6 C8 3.0 TFSI Quattro 340HP DLZA Engine Unit ECU Kit 06M907309G Automatic

€854.95

Free delivery: Nov 12 – 13

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Part no. AH22-18C815-CC

Land Rover Discovery 4 L319 Radio CD Sat Nav Head Unit Stereo AH22-18C815-CC

€23.95

Free delivery: Nov 10 – 13

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