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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Porsche Macan 95B Fuse and Relay Box Fuse Holder 95B971846A

€23.95

Free delivery: Nov 12 – 13

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Part no. 4E0035547G

Audi A8 D3 Radio Receiver Mount Bracket Carrier Holder 4E0035547G

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2168204726

Mercedes W221 Bluetooth Control Module Mobile Phone Interface A2168204726

€23.95

Free delivery: Nov 12 – 13

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Part no. XQA500110-1

Land Rover Range Rover L322 Rear Subwoofer Speaker Unit XQA500110

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9359037

BMW F46 Gran Tourer 3rd Row Seat Wiring Harness Loom 9359037

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9X2Q-12A650-PAD

Range Rover Discovery L319 Engine Unit ECU 3.0 Diesel Automatic 9X2Q-12A650-PAD

€51.95

Free delivery: Nov 12 – 13

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Part no. 6949229-2

4 x Mini R52 Convertible DWA Door Alarm System Module Control Unit Set 6949229

€28.95

Free delivery: Nov 12 – 13

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Part no. A2055404834

Mercedes W205 GLC C253 Touch Pad Controler Wiring Harness Loom A2055404834

€32.95

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Part no. DV6T-14301-AD

Ford Transit Connect Negative Battery Cable Wiring DV6T-14301-AD

€23.95

Free delivery: Nov 12 – 13

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Part no. 4542789

Mini Cooper One R50 R52 R53 W10 1.6 Petrol Engine Starter Motor 4542789

€28.95

Free delivery: Nov 12 – 13

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Part no. A2129007324

Mercedes SLK R171 Petrol M271 Fuse Box SAM Relay Control Module A2129007324

€56.95

Free delivery: Nov 12 – 13

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Part no. 8K0959754H

Audi A5 8T Remote Button Smart Key Fob Unit 8K0959754H

€23.95

Free delivery: Nov 12 – 13

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Part no. 6C1T-14335-BB

Ford Transit Mk7 Antenna Amplifier Control Unit Module 6C1T-14335-BB

€37.95

Free delivery: Nov 12 – 13

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Part no. DK52-14B484-AC

Range Rover L405 Body Control Module Unit BCM ECU DK52-14B484-AC

€32.95

Free delivery: Nov 12 – 13

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Part no. MK83-15K622-CA

Land Rover Range Rover Velar L560 Comfort Control ECU Transceiver MK83-15K622-CA

€42.95

Free delivery: Nov 12 – 13

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Part no. K8D2-14N172-AD

Range Rover Evoque L551 Battery Box Wiring Cable Hybrid K8D2-14N172-AD

€37.95

Free delivery: Nov 12 – 13

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Part no. 4L0971036K

Audi Q7 4L Door Wiring Loom Harness Wire Cable Front Right O/S 4L0971036K

€23.95

Free delivery: Nov 12 – 13

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Part no. 6929726

BMW E65 E66 Front Seat Wiring Harness Loom Cable Left N/S 6929726

€23.95

Free delivery: Nov 12 – 13

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Part no. D1BT-14D212-EB

Ford Transit Connect Bluetooth Interface Control Module ECU D1BT-14D212-EB

€23.95

Free delivery: Nov 12 – 13

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Part no. 8S0972752

VW Volkswagen Tiguan 5n Passat B8 Wiring Loom Harness Plug Conctact 8S0972752

€23.95

Free delivery: Nov 12 – 13

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Part no. 4H0945096H-2

Audi A8 D4 Rear LED Light Lamp Taillight Right O/S Harness Loom Wire 4H0945096H

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2185403005-1

Mercedes CLS C218 Front Door Wiring Harness Loom Passenger Side A2185403005

€28.95

Free delivery: Nov 12 – 13

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Part no. A2075405205

Mercedes W207 Door Cable Wiring Loom Front Left Right Door N/O/S A2075405205

€23.95

Free delivery: Nov 12 – 13

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Part no. A2185403005

Mercedes CLS C218 Front Door Wiring Harness Loom Passenger Side A2185403005

€23.95

Free delivery: Nov 12 – 13

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Part no. 5Q0907361G

Seat Leon Mk3 5F Fuse Box Control Unit Module Relay Box 5Q0907361G

€23.95

Free delivery: Nov 12 – 13

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Part no. A2469008516

Parking Brake Module Mercedes W176 W246 Electric Control Unit ECU A2469008516

€23.95

Free delivery: Nov 12 – 13

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Part no. 8W0907239C

Audi A5 S5 RS5 F5 A4 S4 RS4 B9 Telematic Module Bracket Holder Mount 8W0907239

€42.95

Free delivery: Nov 12 – 13

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Part no. FK72-14A699-BBC

Land Rover Discovery L550 Front Seat Wiring Loom Harness Cable FK72-14A699-BBC

€28.95

Free delivery: Nov 12 – 13

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Part no. A2208200275

Mercedes W220 Front Door Keyless Entry Antenna Right O/S Side A2208200275

€23.95

Free delivery: Nov 12 – 13

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Part no. 9167237

BMW E92 F32 E61 Seat Belt Module Control Unit LCPA ECU 9167237

€23.95

Free delivery: Nov 12 – 13

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Part no. 4L0971036C

Audi Q7 4L Front Door Wiring Loom Cable Passenger Side 4L0971036C

€23.95

Free delivery: Nov 12 – 13

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Part no. 7419610-1

BMW F30 F31 LCI Headlight LED Module Insert Light Source Control Unit 7419610

€32.95

Free delivery: Nov 12 – 13

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Part no. BV61-12A650-DGB-1

Ford Focus Mk3 1.6 TDCI T1DB 115HP Engine Control ECU BV61-12A650-DGB Manual

€113.95

Free delivery: Nov 12 – 13

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Part no. 5Q0907530AB

Audi A3 8V Gateway Control Module Diagnostic Interface Data Bus Unit 5Q0907530AB

€23.95

Free delivery: Nov 12 – 13

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Part no. PZ4450033301

Toyota Avensis T270 Radio Sat Nav Head Unit CD Player Black PZ4450033301

€32.95

Free delivery: Nov 12 – 13

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Part no. 7L5971104

Porsche Cayenne 955 9PA Rear Bumper PDC Sensor Wiring Loom Cable 7L5971104

€23.95

Free delivery: Nov 12 – 13

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Part no. 8577835-4

BMW F31 N57D30A Engine Control Unit ECU 3.0 Diesel 258HP Automatic 8577835 Set

€189.95

Free delivery: Nov 12 – 13

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Part no. 8044503

BMW F06 F10 F12 F13 Fuel Injectors Wiring Loom Harness Cable 8044503

€66.95

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Part no. 4K5971030D

Audi A6 C8 Door Card Wiring Loom Harness Cable Front Passenger Side 4K5971030D

€61.95

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Part no. DX23-14633-BB

Jaguar XF X250 Door Wiring Loom Harness Rear Left N/S DX23-14633-BB

€23.95

Free delivery: Nov 12 – 13

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Part no. 8V0035864

Audi A3 8V Multimedia MMI CD Player Head Unit Audio Player 8V0035864

€104.95

Free delivery: Nov 12 – 13

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Part no. 5Q0907530AG

Skoda Octavia 5E Mk3 Superb Mk3 Gateway Control Unit Module 5Q0907530AG

€28.95

Free delivery: Nov 12 – 13

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Part no. 03L906022RC-1

Audi TT 8J 2.0TDI 170HP CBBB Quattro Engine ECU Kit BCM Key 03L906022RC Manual

€170.95

Free delivery: Nov 12 – 13

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Part no. 3T9035577A

Skoda Superb Mk2 B6 Aerial Antenna Amplifier Module Control Unit 3T9035577A

€23.95

Free delivery: Nov 12 – 13

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Part no. KK62-14N244-AE

Range Rover Sport L494 Alternator Wire Harness Cable Hybrid KK62-14N244-AE

€61.95

Free delivery: Nov 12 – 13

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Part no. A2216890614

Mercedes W221 PDC Distance Control Holder Bracket A2216890614

€23.95

Free delivery: Nov 12 – 13

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Part no. JK2T15K868AB

Ford Transit Custom Rear Bumper PDC Cables Wiring Loom Harness JK2T-15K868-AB

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9329345

BMW F20 F21 F30 F31 Bluetooth Telephone Control Module Unit 9329345

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6933268

BMW 7 Series E65 E66 Control Unit Door Rear Passenger Side 6933268

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2229001306

Mercedes W910 Gearbox Module Transmission Basic Control Unit A2229001306

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8V0919129

Volkswagen Golf R Mk7 A3 8V TV Tuner Control Unit Module ECU 8V0919129

€104.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BM2T-14B321-AC

Ford S-Max Mk1 Air Module Control Module Unit ECU BM2T-14B321-AC

€51.95

Free delivery: Nov 12 – 13

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Part no. 9262215

BMW F01 Front Bumper Parking Sensor PDC Wiring Loom Harness Cable 9262215

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2479002307

Mercedes W177 W247 4Matic Transfer Control Unit Module ECU A2479002307

€137.95

Free delivery: Nov 12 – 13

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Part no. GK2T-14B321-AC

Ford Transit Custom Air Module Control Unit ECU GK2T-14B321-AC

€23.95

Free delivery: Nov 12 – 13

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Part no. A4535406211

Smart A453 Wiring Loom Harnes Cable A4535406211

€32.95

Free delivery: Nov 12 – 13

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Part no. A2465405933

Battery Cable Mercedes W176 W246 Terminal Starter Wiring Harness A2465405933

€23.95

Free delivery: Nov 12 – 13

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Part no. 03L906018JG-2

Audi A5 8F Engine Control Unit ECU 2.0 TDI CGLC 177HP Manual 03L906018JG

€127.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6911584

BMW E65 E66 Steering Wheel MFL Phone Switch Buttons Left N/S 6911584

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9160558

BMW 5 Series E60 E60N E61 E61N LCI Airbag ECU Control Unit Module

€23.95

Free delivery: Nov 12 – 13

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Part no. L1TT14F642AK

Ford Puma St Cf7 Connector Socket Port Smart Data Link Module L1TT-14F642-AK

€23.95

Free delivery: Nov 12 – 13

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Part no. CV6T-15K857-MED

Ford Kuga C520 Centre Console Wiring Loom Harness Cable CV6T-15K857-MED

€23.95

Free delivery: Nov 12 – 13

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Part no. 4F1971845A

Audi R8 42 Fuse Box Electrical Connector Relay Control Unit Module 4F1971845A

€23.95

Free delivery: Nov 12 – 13

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Part no. CK52-14301-BC

Range Rover L405 Negative Battery Terminal Cable Lead Wiring CK52-14301-BC

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BM380-SCREEN

BMW F20 F36 Gran Coupé Radio Multimedia Screen Display Unit 74558010

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9337180

BMW F32 Interior Light Courtesy Wiring Cable Loom Adapter 9337180

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4E0907279S

Audi A8 4E S8 D3 Comfort Module Electric Steering Column Unit 4E0907279S

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2049002013

W204 Mercedes Sat Nav CD Player Radio Stereo Head Unit A2049002013 W204

€99.95

Free delivery: Nov 12 – 13

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Part no. 9261579-TAN

BMW F31 Front PDC Parking Sensor Tanzanite Blue Metallic - X10 9261579

€23.95

Free delivery: Nov 12 – 13

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Part no. 4K8971036F

Audi A6 C8 Door Card Wiring Loom Harness Cable Front Passenger Side 4K8971036F

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5B5C774

Mini F65 F66 F67 U25 Telematics Control Unit Module 5B5C774

€284.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 83A945092-2

Audi Q3 F3 LED Tail Light Rear Right O/S Plug Wire Cable Connector 83A945092

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0419065D

Audi A4 B9 A5 F5 Power Steering Column Control Unit Module 8W0419065D

€47.95

Free delivery: Nov 10 – 13

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Part no. 9117801

Battery Bracket BMW X3 G01 X4 G02 Rear Holder Mount Carrier Support 9117801

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8V0857273F

Audi A3 8V Display Screen Sat Nav Navigation Dashboard 8V0857273F

€108.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9387561

Head Unit BMW I3 I8 Mini F56 Navigation Sat Nav DAB High Control Module 9387561

€227.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9312764-1

BMW F10 LCI Body Control Module ECU Junction Box PL6 JBBFE III V2 9312764

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6549001300-1

Mercedes W213 C238 Glow Plug Relay Diesel OM654 Preglow Module A6549001300

€32.95

Free delivery: Nov 12 – 13

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Part no. A2711504979-1

Mercedes W204 156HP Engine Control Unit ECU KIT SET Petrol Automatic A2711504979

€560.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. YMD001991

Range Rover L322 Parking Sensor PDC Wiring Harness Cable YMD001991

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1439740

BMW X5 E53 Cable Starter-Base B Electrical Cable Wiring 3.0i M54 Petrol 1439740

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0971765F

Audi A4 B8 A5 8T AdBlue Additive Fuel Tank Wiring Loom 2.0 TDI 8K0971765F

€23.95

Free delivery: Nov 12 – 13

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Part no. LPLA-10C307-AD

Range Rover Sport L494 Starter Motor Cable Wire Loom 3.0 Diesel LPLA-10C307-AD

€32.95

Free delivery: Nov 12 – 13

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Part no. 03L903023

Audi A3 8V Diesel Engine Starter Alternator Electrical 14V 140A 03L903023

€42.95

Free delivery: Nov 12 – 13

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Part no. A2465406432

Battery Cable Mercedes W176 W246 Negative Lead Wiring Harness A2465406432

€23.95

Free delivery: Nov 12 – 13

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Part no. 8T2035110A

Audi A5 8T Radio Head Unit Navi CD DVD Player Changer 8T2035110A

€32.95

Free delivery: Nov 12 – 13

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Part no. A2124405833

Door Wiring Mercedes W212 Loom Cable Rear Left Right N/O/S A2124405833

€23.95

Free delivery: Nov 12 – 13

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Part no. 6933267

BMW 7 Series E65 E66 E67 Control Unit Door Front Passenger Side 6933267

€23.95

Free delivery: Nov 12 – 13

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Part no. 4H0971365H

Audi A8 D4 Seat Wiring Harness Cable Seat Belt Warning System 4H0971365H

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P5971073AB

Porsche Cayenne 92A VTS Vehicle Tracking System Wiring Loom Harness 7P5971073AB

€32.95

Free delivery: Nov 12 – 13

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Part no. 7P5971411A

Porsche Cayenne 92A Air Heater Flap Actuator Motor Wiring Cable 7P5971411A

€23.95

Free delivery: Nov 12 – 13

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Part no. 6850765

Mini F46 F45 F60 Braking Cable DSC Pulse Generator Sensor Wiring Front 6850765

€28.95

Free delivery: Nov 12 – 13

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Part no. 8V0919813

VW Volkswagen Golf R Mk7 Toll Reader Device Module Chip Card Reader 8V0919813

€32.95

Free delivery: Nov 12 – 13

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Part no. A0009056001

Battery Cable Mercedes W213 S213 Negative Lead Wiring Harness A0009056001

€32.95

Free delivery: Nov 12 – 13

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Part no. A2185402605

Mercedes CLS C218 Front Door Wiring Harness Loom Driver Side A2185402605

€23.95

Free delivery: Nov 12 – 13

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Part no. 4F9035225AA

Audi A6 C6 Antenna Amplifier Control Unit Module 4F9035225AA

€23.95

Free delivery: Nov 12 – 13

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Part no. 859800D060

Toyota Yaris XP10 Door Control Module Unit ECU 859800D060

€23.95

Free delivery: Nov 12 – 13

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Part no. 51794731

Fiat Panda Mk2 Fuse Box Relay Cover Lid Cap Housing Under Bonnet 51794731

€23.95

Free delivery: Nov 12 – 13

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Part no. 1812480

Ford Focus Mk3 Seat Air Module Sensor Front Passenger Side BM51-A625B02-AC

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

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