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 A5 8F Window Lifter Module Control Unit Rear Left Right N/O/S 8T0959795F

€23.95

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Part no. 8T0971029AE

Audi A5 S5 8T Coupe Front Door Wiring Loom Harness Driver's Side 8T0971029AE

€42.95

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Part no. 93457542

Radio Player Renault Trafic III Vauxhall Vivaro B Audio Head Unit 93457542

€227.95

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Part no. 8K0959795E

Audi A4 B8 A5 8F Door Window Control Module Front Left Right N/O/S 8K0959795E

€23.95

Free delivery: Sep 11 – 14

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Part no. A2135401087

Mercedes W205 W213 Battery Starter Alternator Wiring Harness OM654 A2135401087

€32.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. BS7T-14K131-BA

Range Rover Evoque L538 Fuse Relay Box Module 2.2 Diesel BS7T-14K131-BA

€28.95

Free delivery: Sep 11 – 14

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Part no. A2045451040

Mercedes W204 W212 Multimedia Interface Unit Module Bracket Mount A22045451040

€23.95

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Part no. JPLA-14D618-BB

Range Rover Sport L494 Front Door Control Module Driver's Side JPLA-14D618-BB

€28.95

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Part no. 7823314

Mini Cooper R55 R56 R57 LCI N47N 1.6 Diesel Engine Starter Motor 7823314

€23.95

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Part no. 9118262

Antenna Amplifier BMW F10 F22 F30 F32 Module Trap Circuit Control Unit 9118262

€23.95

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Part no. 3c0937125

Volkswagen VW Passat B6 Fuse Box Relay Electrical Module Unit 3C0937125

€23.95

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Part no. 5B4D4A9

BMW X1 U11 B38X 245HP xDrive Engine Control ECU DME 5B4D4A9 Automatic

€807.95

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Part no. A2129060605

Mercedes W212 Fuse Box Rear Relay Control Unit Electric Module SAM A2129060605

€85.95

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Part no. 9252812

BMW F10 F11 F01 Fuse Box Power Distribution Junction Relay Rear 9252812

€51.95

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Part no. 8067511

BMW F98 Adapter Cable Wiring RBS Rear Axle 8067511

€23.95

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Part no. 7P0907311C-1

Volkswagen Touareg 7P 3.0 TDI CJMA 204HP Engine ECU Set 7P0907311C Automatic

€707.95

Free delivery: Sep 11 – 14

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Part no. 6819934

BMW X5 F15 X6 F16 Front Door Card Light Wiring Loom Left Right N/O/S 6819934

€32.95

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Part no. 1J0972732

Audi Q7 4L Rear Tail Light Lamp Bulb Connector Wiring Left Right N/O/S 1J0972732

€23.95

Free delivery: Sep 11 – 14

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Part no. A2215408335

Mercedes W221 Door Harness Left Right N/O/S Rear Door Wiring Loom A2215408335

€28.95

Free delivery: Sep 11 – 14

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Part no. 8674262-1

Mini Cooper S F55 F56 B48 192HP Engine Control Unit ECU Kit DME 8662849 Manual

€189.95

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Part no. 9323378

BMW X5 F15 X6 F16 Front Door Card Wiring Loom Harness Cable Left N/S 9323378

€28.95

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Part no. 5N0971693A

Volkswagen Tiguan 5N Rear Door Harness Cable Wiring Left Right N/O/S 5N0971693A

€23.95

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Part no. 95B907530L

Porsche Macan 95B Body Gateway Module ECU Control Unit 95B907530L

€94.95

Free delivery: Sep 11 – 14

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Part no. 9348356

BMW F20 F21 F22 F30 F32 Front Electronic Module Control Unit FEM 9348356

€118.95

Free delivery: Sep 11 – 14

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Part no. 1Z0035729E

Seat Ibiza 6J Bluetooth Interface Box Control Unit Module ECU 1Z0035729E

€28.95

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Part no. 6958414

BMW E60 E61 Alarm System Unit Ultra Sonic Module 9149673

€23.95

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Part no. 8X0915459

Audi A1 8X Positive Battery Overload Protection 8X0915459

€23.95

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Part no. 8W0907063CF

Audi A4 B9 Body Control Comfort Unit Module BCM Unit ECU 8W0907063CF

€80.95

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Part no. 4K0803123B

Audi A6 C8 Battery Clamping Strip Holder Support Carrier Mount 4K0803123B

€23.95

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Part no. A4539002104

Smart 453 Fortwo Audio System Radio Navigation Unit Module A4539002104

€94.95

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Part no. 5E0919605B

Skoda Octavia 5E Sat Navi Stereo Radio Audio Head Unit Player 5E0919605B

€37.95

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Part no. 5Q0915181E

Audi A3 8V Negative Battery Terminal Cable Harness Wiring Loom 5Q0915181E

€23.95

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Part no. 8506666

Mini Cooper D R60 ALL4 N47N Diesel Engine Control Unit ECU DDE 8506666 Manual

€47.95

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Part no. 6863386

BMW F33 ICM Control Unit Module ECU 6863386

€80.95

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Part no. 5E7035577B

Skoda Octavia Mk4 NX Aerial Antenna Amplifier Control Unit 5E7035577B

€37.95

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Part no. 8582280-11

BMW F20 F30 F31 118d 318d N47N 143HP Engine Unit ECU DDE Kit 8582280 FEM + Key

€165.95

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Part no. 8590102

Alternator Cable BMW 5 G30 G31 G12 B57 Battery Wiring Alternator B+ 8590102

€32.95

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Part no. A2044409005

Mercedes W204 Battery Wiring Starter Alternator Wiring Harness A2044409005

€23.95

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Part no. H1BT-14F642-AE

Ford Fiesta ST MK8 Port Data Link Module OBD Smart Link H1BT-14F642-AE

€28.95

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Part no. 7621178-5

BMW E81 E87 LCI E90 N43 118i 318i Engine Control ECU DME Kit 7621178 Automatic

€375.95

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Part no. 2755704

Genuine BMW Mini Cooper One R55 R56 R57 R60 R61 Fuse Box Empty Housing 2755704

€23.95

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Part no. A2195404605

Mercedes C219 Rear Bumper PDC Wiring Parking Sensor Loom Harness A2195404605

€32.95

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Part no. 1K0907115A

VW Golf Mk5 GTI 2.0 AXX 200HP Engine Control Unit ECU 1K0907115A Dual-Clutch

€332.95

Free delivery: Sep 11 – 14

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Part no. 8R0971030B

Audi Q5 8R Front Door Wiring Loom Harness Cable Passenger Side 8R0971030B

€32.95

Free delivery: Sep 11 – 14

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Part no. 81A971687J

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

€32.95

Free delivery: Sep 11 – 14

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Part no. 7943752

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

€42.95

Free delivery: Sep 11 – 14

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Part no. A2059000017

Mercedes W176 W205 W212 Telematics Communication Control Module ECU A2059000017

€23.95

Free delivery: Sep 11 – 14

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Part no. A6519007003-5

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

€189.95

Free delivery: Sep 11 – 14

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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: Sep 11 – 14

If paid before 14:00

Part no. 7H0945095J-1

VW Transporter T5 Rear Tail Light Wiring Harness Cable Plug Left N/S 7H0945095J

€23.95

Free delivery: Sep 11 – 14

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Part no. 5K0971104B

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

€23.95

Free delivery: Sep 11 – 14

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Part no. A0009061705

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

€113.95

Free delivery: Sep 11 – 14

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Part no. 5K0035730E

Skoda Yeti 5L Bluetooth Control Unit Module 5K0035730E

€85.95

Free delivery: Sep 11 – 14

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Part no. 5B9FD84

Mini F65 F66 F67 Garmin Head Unit Audio Navigation 5B9FD84

€332.95

Free delivery: Sep 11 – 14

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Part no. 3AA959257A

Volkswagen Golf Mk7 Tiguan Mk2 Crafter Mk2 Body Comfort Control Unit 3AA959257A

€42.95

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Part no. AV6N-10C679-BD

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

€23.95

Free delivery: Sep 11 – 14

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Part no. 95B955941D

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

€165.95

Free delivery: Sep 11 – 14

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Part no. A2118703126

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

€23.95

Free delivery: Sep 11 – 14

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Part no. 9656164180

Citroën C3 C4 Picasso Hands-free Bluetooth Microphone Mic 9656164180

€28.95

Free delivery: Sep 11 – 14

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Part no. A2474703702

Mercedes W177 W247 Solenoid Valve Line Pipe Hose Starter A2474703702

€42.95

Free delivery: Sep 11 – 14

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Part no. 8635816

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

€61.95

Free delivery: Sep 11 – 14

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Part no. 5LA907357H

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

€23.95

Free delivery: Sep 11 – 14

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Part no. A2468200035

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

€23.95

Free delivery: Sep 11 – 14

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: Sep 11 – 14

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: Sep 11 – 14

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Part no. 8603352-5

BMW F20 F21 F30 N13 1.6 170HP Engine Control Module ECU DME Kit 8603352 Manual

€455.95

Free delivery: Sep 11 – 14

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Part no. 5H22-18K891-AA

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

€23.95

Free delivery: Sep 11 – 14

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Part no. 8K0907364

Audi S4 B8 Quattro Dynamic Suspension Electric Damper Control Module 8K0907364

€51.95

Free delivery: Sep 11 – 14

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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: Sep 11 – 14

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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: Sep 11 – 14

If paid before 14:00

Part no. 8321087

BMW 5 SERIES E60 ELECTRIC SEAT Height Adjust 0390203234 8321087

€24.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 9118111

BMW 1 Series E81 E82 Door Wiring Loom Harness 9118111

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. LR140623

Land Rover Discovery Sport L550 Alternator Generator 2.0 AJ200 LR140623

€132.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2128300008

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

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2185402110

Mercedes C218 USB AUX Socket Port Cable Harness Wire Cable A2185402110

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A1669063901

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

€37.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 7N0937503A-1

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

€23.95

Free delivery: Sep 11 – 14

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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: Sep 11 – 14

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Part no. K8D2-14633-AAD

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

€51.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2229002009

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

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5Q0927165A

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

€23.95

Free delivery: Sep 11 – 14

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Part no. A2075404207

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

€37.95

Free delivery: Sep 11 – 14

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Part no. A1765409502

Mercedes W176 Centre Console Wiring Harness Cable A1765409502

€23.95

Free delivery: Sep 11 – 14

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Part no. 191906383C-1

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

€23.95

Free delivery: Sep 11 – 14

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Part no. 5B3C455

BMW X1 U11 Starter Generator Alternator 1.5 Petrol Hybrid 5A96D93

€1,139.95

Free delivery: Sep 10 – 14

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Part no. 5N0971366AQ

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

€28.95

Free delivery: Sep 11 – 14

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Part no. 99661021101

Porsche Boxster 986 Fuse Box Relay Fuse Module Control Unit 99661021101

€37.95

Free delivery: Sep 11 – 14

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Part no. 9154329

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

€23.95

Free delivery: Sep 11 – 14

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Part no. 6974370

Alarm System Unit BMW E60 E61 Ultra Sonic Module 6974370

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 6922528

BMW 5 Series E61 E61N LCI Holder Bracket Additional Battery 6922528

€26.95

Free delivery: Sep 11 – 14

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Part no. 1K0971250CE

Volkswagen Jetta A6 Manual Gearbox Earth Line 1K0971250CE

€23.95

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Part no. A2055405393

Mercedes W205 Electrical Wiring Harness Loom A2055405393

€23.95

Free delivery: Sep 11 – 14

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Part no. GX73-12C520-FAF

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

€28.95

Free delivery: Sep 11 – 14

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Part no. 079971821

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

€23.95

Free delivery: Sep 11 – 14

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Part no. 5TRK0200UK

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

€23.95

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Part no. A2059000146

Mercedes W205 Display Screen Instrument Cluster Speedo Meter Sat Nav A2059000146

€455.95

Free delivery: Sep 11 – 14

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Part no. A1679004211

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

€94.95

Free delivery: Sep 11 – 14

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Part no. CONNECT-MK1-RADIO

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

€237.95

Free delivery: Sep 11 – 14

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Part no. 7607454

Battery Insert BMW F13 F12 F06 Battery Crashpad Foam Insulator 7607454

€23.95

Free delivery: Sep 11 – 14

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