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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Ford Transit Custom MK8 Fuse Relay Box Control Unit Module BK2T-14A175-CA

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1648201826

Mercedes W251 Parking Distance Control Module ECU PDC A1648201826

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055407311

Mercedes C205 C63 AMG Fuse Box Housing Cover A2055407311

€127.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8517727-6

Mini Cooper SD ALL4 R56 LCI R60 143HP N47N Engine ECU Kit DDE 8517727 Manual

€203.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9244134

BMW 1 3 X1 Series E81 E87 E90 E91 E92 Ultra Sonic Module Alarm System 9244134

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7533282

BMW X3 Z4 E83 E85 E86 Fuse Box Cover Power Distribution Engine Bay 7533282

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. LS7T-14G229-BL

Ford Mondeo Mk5 Bluetooth Control Module Phone Transceiver ECU LS7T-14G229-BL

€189.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6G9T-14B192-CA

Ford Fiesta Transit Relay 4-Pin Black FoMoCo Unit 6G9T-14B192-CA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8T0945094C-2

Audi A5 8T Rear Tail Light Wiring Loom Harness Cable Plug Right O/S 8T0945094C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6781806

Mini R50 Radio Remote Alarm Key Fob Button 433 MHz Ignition Barrel Lock 6781806

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4H0959792F

VW Touareg 7P Front Door Control Module Unit ECU Passenger Side 4H0959792F

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 3D0907040H

VW Volkswagen Phaeton 3D Climate Air Conditioning Control Module Unit 3D0907040H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1649100075

Mercedes ML W164 Lumbar Module Front Seat Lumbar Control Unit A1649100075

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6C0971065

Volkswagen VW Polo MK5 Parking Sensor Wiring Rear Bumper Loom Cable 6C0971065

€28.95

Free delivery: Sep 23 – 24

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Part no. 6905639

BMW E65 E66 Japan Mobile Phone Buffer Module ECU J-buf 6905639

€23.95

Free delivery: Sep 23 – 24

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Part no. F1BT-18C815-HH

Ford Transit Custom Focus MK3 Radio CD Player Head Unit F1BT-18C815-HH

€28.95

Free delivery: Sep 23 – 24

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Part no. A0025427219

Mercedes W169 W245 W204 W212 Relay 4-Pin Black Hella A0025427219

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729058300-1

Mercedes SLK R172 Pedestrian Protection Impact Crash Sensor Module A1729058300

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1H0911251

Audi Volkswagen Seat Skoda Relay 5 Pin 12V 10A 1H0911251

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0971235J

Audi A3 Volkswagen Golf Battery Wire Cable Negative Earth Lead 1K0971235J

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6778809

Mini Cooper One R55 R56 R57 Xenon Headlight Level Sensor 6778809

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0937084CP

Audi S3 8V Module BCM Body Control Unit Module ECU 5Q0937084CP

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045403710

Mercedes W204 ABS Sensor Wiring Harness Front Left N/S A2045403710

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009052802

Mercedes W212 Negative Battery Terminal Cable Wire A0009052802

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. a0045468040

Mercedes W204 W212 W221 Power Distributor Box Conectors Socket A0045468040

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9354756

Gateway Module BMW F11 Touring Central Gateway Body Control Module ZGW 9354756

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8J0907274B

Audi TT 8J Tyre Pressure Control Module Unit 8J0907274B

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9462542

BMW F20 F21 F30 F31 Mini F56 Air Conditioning Module A/C Control Unit 9462542

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139008330

Mercedes W177 W213 W247 Automatic Gearbox Control Unit Module ECU A2139008330

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059061805

Porsche Cayenne S 92a Ambient Lamp Door Wiring Harness Rear Left N/S A2059061805

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7626546

BMW F20 F21 F22 F30 F31 LCI Petol Starter Motor Engine 7626546

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7CA971696J

Volkswagen Crafter SY Rear Door Wiring Loom Harness Cable Right O/S 7CA971696J

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6C1T2L508AD

Ford Transit Mk7 Rear Brake Pad Wear Warning Harness Wire Loom 6C1T-2L508-AD

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4F0907274

Audi A6 S6 4F Q7 4l Tyre Pressure Control Module Unit ECU 3.0 TDI CJGA 4F0907274

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1693000204-2

Accelerator Sensor Mercedes W169 W245 YAW Rate Control Unit Module A1693000204

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9878329

BMW U06 X1 U11 Front Subwoofer Speaker Bass Low Tone Left N/S 9878329

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9309990

Mini F57 Cabrio Antenna Aerial Amplifier AM / FM Rear Unit Module FM2 9309990

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9240647

BMW F02 Television Tuner TV Receiver Control Unit Module 9240647

€142.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7P5959107F

Porsche Cayenne 92A Rear Tailgate Control Module Unit 7P5959107F

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. M8D2-12C525-AA

Range Rover Evoque L551 Engine Control Unit ECU Bracket Cooler M8D2-12C525-AA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009004839

Mercedes C118 W177 C247 Battery Control Module Unit ECU A0009004839

€284.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 982972156B

Porsche 718 Boxster 982 Front Bumper Wiring Harness Parking Right O/S 982972156B

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6994420

BMW G20 G21 330e Hybrid Rear Power Distribution Fuse Box 6994420

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4F1941824A

Audi A5 F5 Fuse Box Control Module Connector Plug Socket Wiring Loom 4F1941824A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. CV1T-14B531-AF

Ford Fiesta Mk7 B-Max Front Door Control Module Driver's Side CV1T-14B531-AF

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9294912

BMW F10 F11 X5 F15 X6 F16 Rear Seat Compartment Screen Display SET 9294912

€569.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7591529

BMW F12 F13 F20 F21 Alternator Generator 14V 210A N55 Petrol Engine 7591529

€80.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469007314-2

Mercedes C117 W246 Central Display Screen Multimedia Sat Nav Unit A2469007314

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. BK2T-18C394-BBF

Ford Transit Custom Door Wiring Harness Right Rear O/S Loom BK2T-18C394-BBF

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 2HJ962211N

Volkswagen Amarok Mk2 Engine Earth Ground Wiring Harnes Cable MB3T-18C942-BF

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9800268980

Citroën C4 Grand Picasso 1.6 HDi 110HP 9HR Engine ECU Module 9800268980 Manual

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. LU5T-14B534-AE

Ford Puma ST CF7 Rear Door Control Module Unit Left Right N/O/S LU5T-14B534-AE

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2709002100-8

Mercedes C117 CLA45 AMG 4Matic M133.980 Engine Control ECU Kit A2709002100 Key

€493.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2519061100

Mercedes W251 Central Multimedia Navi GPS Control Head Unit ECU A2519061100

€313.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1777082

Ford Focus Mk3 1.6 TDCi Negative Battery Cable AV6T-14324-EAE

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. BJ32-06040-AB

Range Rover Evoque L538 Storage Fuse Box Schema Cover Cap BJ32-06040-AB

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1698702710

Mercedes-Benz A B Class W169 W245 Tow Protection ECO Switch Button Unit Module

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. CX23-18K891-CA

Land Rover Discovery Sport L550 Aerial Antenna Amplifier Unit CX23-18K891-CA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 80A907247

Audi SQ5 FY Line Keyless Entry Antenna Control Module 80A907247

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0959655AK

Skoda Superb Mk3 3V Air Module Control Unit ECU 5Q0959655AK

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9343605-1

Mini Countryman F60 Accumulator Battery Clamp Pyro Fuse Housing Box 9343605

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W6945093L-1

Audi A5 S5 F5 LED Tail Light Lamp Wire Harness Wiring Cable Left N/S 8W6945093L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7838041

BMW M3 E93 Engine Throttle Body Cable Wiring Loom Plug 7838041

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6797439

BMW F07 GT ICM Management Control Unit Module DSC Brakes 6797439

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2048205015

Mercedes W204 W207 Wiring Loom Cable Harness AUX Jack A2048205015

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8579482

BMW F20 F21 116d ed Diesel N47N 116HP Engine Control ECU DDE 8579482 Manual

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8T0959754C

Audi A5 8T 8F A6 S6 4G 3 Button Smart Remote Car Key Fob Sender Unit 8T0959754C

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1695403605

Mercedes A-Class W169 B-Class W245 Door Wiring Loom Front Right O/S A1695403605

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9894915-1

BMW G30 Engine Control Unit DME ECU + Key 2.0 B48X 251HP Automatic Set 9894915

€469.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 3AF945095C-2

Volkswagen Passat B7 Saloon Rear Tail Light Wiring Outer Left N/S 3AF945095C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2105450403

Cable Connector Mercedes W204 W210 W212 W639 Plug Wiring Loom Cap A2105450403

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9060005999

Mercedes Sprinter W906 Front Door Wiring Harness Left Right N/O/S A9060005999

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7L0941824A

Volkswagen Touareg 7L Fuse Box Module Electrical Relay Control Unit 7L0941828A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 83A947356AB

Audi RSQ3 F3 Front Door LED Lighting Module Control Unit Right O/S 83A947356AB

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1668200689

Antenna Amplifier Mercedes W176 Aerial Module Unit Rear A1668200689

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2468201915

AUX Jack Port Mercedes C117 W246 W176 Wiring Loom Cable Harness A2468201915

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6F0945207J-2

Seat Ibiza Mk5 Fr Rear Taillight Left N/S Harness Wire Loom Cable 6F0945207J

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0907777L

Audi RS5 F5 Chassis Module Control Unit 8W0907777L

€313.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. BM5T-18B955-CG

Ford Focus Mk3 Radio Display Screen Stereo Head Unit BM5T-18B955-CG

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8V0035398A

Audi A3 8V A-Pillar Speaker Tweeter Front Left Right N/O/S 8V0035398A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8F0959729

Audi A5 S5 8F Rear Window Regulator Control Unit Bracket Holder Mount 8F0959729

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 2Q0915459

Volkswagen Polo GTI AW1 Rear Battery Potential Distributor Positive 2Q0915459

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 3R0971035S

Seat Exeo Front Door Trim Wire Harness Wiring Loom Passenger Side 3R0971035S

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6977724

BMW 3 Series E90 Xenon Footwell Light Module Control Unit ECU PL2 FRMFA 6977724

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8519009

BMW X1 E84 20d 20dX Diesel N47N Engine Control Unit ECU DDE 8519009 Manual

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7618644

BMW Z4 Series E89 Roadster Petrol N20 Cable Alternator-Starter-Base B 7618644

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 3Q0907566K

Audi Q3 F3 Lane Assist Module Blindspot Control Unit Right O/S 3Q0907566K

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9824925

Mini F55 F56 F60 LCI Navigation Touch Screen 8.8" Display Nav Head Unit 9824925

€446.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5QS959655A

Audi A3 S3 8Y Air Module Crash Impact Sensor Unit Control ECU 5QS959655A

€70.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2128201689

Mercedes W212 Antenna Amplifier Aerial Module Unit A2128201689

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7N0937503A

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5E2941015-2

Skoda Octavia MK3 Front Headlight Xenon Wiring Harness Cable Left N/S 5E2941015

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6923207

Mini Cooper One R50 R53 Alarm System Inclination Sensor III

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. F15-LINUX-NBT

BMW X5 F15 Dashboard Monitor Ugode Onboard Central Display Screen 12,3"

€237.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 3Q0959435L

Entry Keyless Audi A3 S3 RS3 8V Kessy Control Module Unit ECU 3Q0959435L

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2319054300

Mercedes R172 C207 W212 C218 Ignition Remote Key Fob A2319054300

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4M5T-14B056-BJ

Ford Focus Mk2 Air Module Control Unit Controller 4M5T-14B056-BJ

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. M8A2-19G509-AH

Range Rover Velar L560 Camera Control Module ECU M8A2-19J501-AD

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9359013

Control Unit BMW F01 F02 F07 F10 F11 CAS4 Key Reading Module 9359013

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

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