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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BMW 7 Series E65 E66 Fuse Board Power Distribution Box

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7534921

BMW 3 X3 Series E46 E83 Engine Electronics Complete Control Unit Box 7534921

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9210861

BMW F10 F11 Power Distribution Fuse Box Front 9210861 61149210861

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9359799

BMW i3 I01 F10 F20 F30 LCI KaFAS Camera Speed Control ECU Module Unit 9359799

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6916058

Mini Cooper R50 R52 R53 Support Bracket Navigation Computer 6916058

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6809545

Mini F56 Interior Electrical Cable Excitement Package Wiring Harness 6809545

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9354289

BMW F45 F46 Mini F60 Sensor For Pedestrian Protection PTS Control Unit 9354289

€104.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0907468F

Audi A5 8T Diagnostic Interface Gateway Control Module Unit ECU 8R0907468F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5M5T14B192EA

Ford Transit Custom Relay 4-Pin Black 12V 40A FOMOCO 5M5T14B192EA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9075406749

Mercedes W907 Battery Electrical Ground Line Wire Earth Cable A9075406749

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9380885

BMW 1 3 4 F20 F30 F32 Control Unit Air Conditioning A/C Module 9380885

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0025421319-4

Mercedes W204 Genuine Universal Car Relay 4-Pin Tyco X4 Black A0025421319

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2129001529

Mercedes-Benz C E Class W204 W207 W212 Front Left Door N/S Control Unit Module

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8636064

Wiring Cable BMW F20 F30 LCI B48 Engine Injector Ignition Loom 8636064

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0051517401

Starter Motor Mercedes W169 W245 Diesel Engine A0051517401

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8506281

BMW E81 E87 E90 LCI 116d 316d 118d 318d N47 Engine ECU DDE 8506281 Manual

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009820112

Mercedes W177 W207 Power Energy Distribution Unit Module A0009820112

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009821923-1

Mercedes W205 Interior Trunk Fuse Box Automotive Pink Relays Set A0009821923

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. LR022528

Range Rover L405 Alternator Generator 12V 4.4 SDV8 BH42-10300-AC

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G8959107S

Audi A7 4G8 Sportback Electric Tailgate Bootlid Control Unit Module 4G8959107S

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8376506

BMW Mini Cooper One R50 Power Folding Wing Mirror Module ECU Control 8376506

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009001017

Mercedes S205 W205 Air Conditioning Control Module A/C ECU Unit A0009001017

€33.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9158040

Mini R55 R56 R57 Flat Cable Wiring Wire CAS 9158040

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2189000104

Mercedes CLS X218 Parktronic PDC Parking Assist Control Module A2189000104

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1729000302

Mercedes R172 PDC Parking Distance Sensor Control Module Unit A1729000302

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6861026

BMW I01 F45 F46 Mini F55 F56 Parking Assistant PDC Control Unit Module 6861026

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0959592M

Audi A4 B9 A5 F5 Front Door Module Control Unit ECU Passenger Side 8W0959592M

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6935597

Parking Sensor BMW E81 E87 E90 E91 PDC Front Rear Titansilber Silver - 354

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6866990

Airbag Module BMW F01 F02 LCI F10 F11 F13 Air Bag ECU ICM Control Unit 6866990

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 0390203255

Seat Adjustment Motor Mercedes W221 Front Seat Motor Actuator 0390203255

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5J0937019

Seat Ibiza Mk4 6J Fuse Box On Board Supply Control Unit 5J0937615C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0038201926

Mercedes W221 Door Crash Impact Sensor Rear Left Right N/O/S A0038201926

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2475400600

Mercedes W177 Rear Axle Wheel RPM Speed Right Sensor Wire Harness A2475400600

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1779001304

Door Module Mercedes C118 W177 W247 Front Left N/S Control Unit A1779001304

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6944499

BMW 5 6 Series E60 E61 E63 Passenger Side Door Airbag Control Module 6944499

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G0907637L

Audi RS6 C7 Acceleration Yaw Rate Sensor Module Control Unit ECU 4G0907637L

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8803368

Display Screen BMW F45 F46 Central Information Navigation Monitor 6,5" 8803368

€161.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5M0907357D

Seat Exeo 3R Headlight Range Control Unit Module ECU 5M0907357D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4N0959651D

Audi Q5 FY Crash Impact Sensor Unit Module Left Right N/O/S 4N0959651D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6964139

BMW 7 Series E65 E66 E67 Front Control Unit Door Passenger Side 6964139

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. B67875846-1

Mercedes W203 Bluetooth Hands Free Mobile Phone Adapter Bracket Holder B67875846

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. CADDY-SCREEN

Volkswagen VW Caddy 2K Android Car Radio System 7" Touchscreen

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8518269-6

BMW E90 E91 LCI N47N 320d 184HP ECU KIT DDE CAS 3 Key 8518269 Manual

€151.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0971237A

Audi TT 8J Starter Motor Negative Battery Wiring Harness Cable 8J0971237A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7849446-1

BMW F15 F85 F16 F86 Steering Wheel Lane Change Control ECU Module 7849446

€80.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7P0937401

Volkswagen Touareg 7P Power Distribution Unit Positive Battery Socket 7P0937401

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2049006003

Radio Player Mercedes W204 Audio 20 Navi CD Player Head Unit A2049006003

€218.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1729060205-1

Mercedes SLK R172 Rear SAM Fuse Relay Box Control Unit Module A1729060205

€89.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0959595M

Audi A4 B9 A5 F5 Door Module Rear Right Left N/O/S Control Unit 8W0959595M

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6967184

BMW X5 X6 Series E70 E71 Positive Battery Cable Terminal Box Base B+ 6967184

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2753025

Mini Cooper R55 R56 R57 R58 Wiring Heated Seat Loom 2753025

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3427749

BMW X3 E83 Cable Loom Door Passenger Side Wiring Harness 3412570

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0971228M

Battery Cable Volkswagen VW Golf Mk5 Positive Plus Pole Lead 1K0971228M

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6956744

BMW 1 3 Series E81 E82 E87 E88 E90 E91 Ultrasonic Sensor PDC Sydney Blue 6956744

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9459673

Seat Module BMW X4 F26 F20 F30 Front Driver Side Control Unit ECU 7943747

€61.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8691838-1

Mini F54 F55 F57 B48 136HP Petrol Engine Control ECU Kit DME 8674258 Manual

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0028201326

Mercedes SLK R171 Crash Sensor Air Bag Impact Module Control Unit A0028201326

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2078201989

Mercedes-Benz W207 A207 Radio Aerial Antenna Amplifier Module Unit A2078201989

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9315151

BMW X3 F25 Fuse Box Power Distribution Control Unit Box Rear 9315151

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8XA971679C

Audi A1 8X Dashboard Glove Box Wiring Loom Cable Storage Harness 8XA971679C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1669008009

Mercedes GLE W166 Rear Door Wiring Control Module Right O/S Unit ECU A1669008009

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2251619

Ford Focus MK3 Fiesta Mk6 Alternator Generator 1.5 TDCi Engine AV6N-10300-DC

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6968652

BMW 3 Series E93 E93N LCI Aerial Antenna AM / FM Right O/S 6968652

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2469003114

Transmission Module Mercedes W176 W246 Control Unit ECU A2469003114

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2465400508

Battery Cable Mercedes C117 W176 W246 Alternator Wiring Harness A2465400508

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06K907425C-1

Audi Q3 8U 2.0 TFSI CULB 180HP Quattro Engine ECU Kit 06K907425C Ignition + Key

€227.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06F971082F

Audi TT 8J 2.0 TFSI Petrol Fuel Injectors Wiring Harness 06F971082F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9291701

BMW F10 F11 LCI Front Seat Left N/S Wire Harness Loom Cable 9291701

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. BJ32-14D620-AC

Land Rover Freelander 2 L359 Rear Door Control Unit Module BJ32-14D620-AC

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8639595

BMW F30 F31 F32 320i 420i N20 ECU Engine Control Unit DME 8639595 Automatic

€322.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3452166

BMW X3 E83 Air Module Control Unit ECU 3452166

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6929950

BMW 5 Series E60 E61 E63 E64 LCI CD Changer Magazine 6929950

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8517727

Mini Cooper D R60 N47N Engine Control Unit ECU 8517727 Manual

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8635815

BMW F20 F30 LCI 118i 318i B38 Gearbox Wiring Loom Harness Cable 8635815

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7605061

Alternator Generator BMW F10 F30 N20 Diesel Electrical Unit Denso 210A 7605061

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6990089-1

BMW 6 X3 Series E63 E83 Radio Antenna Amplifier Suppression Filter

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7848469

BMW F80 M3 F82 F83 M4 Wiring Harness Engine Gearbox Module 7848469

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6946106

BMW 7 E65 E66 Passenger Seat Airbag Sensor Control Unit Module 6946106 6970899

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7837775

BMW 3 Series E90 E92 E93 M3 S65 Starter Motor Petrol 7837775

€71.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. HK72-13444-AA

Land Rover Discovery Sport L550 Rear Tailgate Boot Wiring Loom HK72-13444-AA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9299335

BMW F01 F02 F07 F10 F11 CAS4 Control Unit Key Reading Module 9299335

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0907468K

Gateway Interface Audi A5 8T A4 B8 Control Unit Module ECU 8T0907468K

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2751265-7

Cable Wiring Mini R55 R56 Headlight Lamp Front Left N/S Plug Socket 6913653

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009008004

Parking Module Mercedes W207 W212 PDC Distance Control Unit ECU A0009008004

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0907637K

Audi A8L 4H Yaw Rate Domain Control Module Unit ECU 4H0907637K

€61.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9159795

BMW X5 X6 E70 E71 Control Unit Air Module Bag ECU Unit Bosch 9159795

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7520902

BMW 3 5 E60 E90 E92 Carrier Bracket Holder Engine Control Module Unit 7520902

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 02E911024B

Starter Motor VW Golf GTI Audi Seat Skoda Petrol CJX CHHA Bosch 1.1KW 02E911024B

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2218201811-2

Mercedes W221 Bluetooth Hands Free Mobile Phone Adapter Connector A2218201811

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7394905

BMW F06 F12 F13 LCI Turn Signal LED Module Left N/S 7394905

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7446712

BMW F23 Cabrio Convertible Folding Top Roof ECU Control Unit CVM Module 7446712

€127.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8573257-6

BMW F10 F11 520d Diesel N47N 184HP Engine Control Unit ECU DDE 8573257 Automatic

€89.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6972611

BMW 5 Series E60 E61 Wiring Rear Left Right Door Cable Harness N/O/S 6982362

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9309991

Diversity Antenna Amplifier Mini F57 Convertible DAB Module Unit 9309991

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2711541402-1

Alternator Generator Mercedes W203 W204 M271 Engine Valeo 120A 14V A2711541402

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2035450803-1

Mercedes CL203 W203 Battery Terminal Fuse Box Control Unit Module A2035450803

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 0AD927755BG

VW Volkswagen Touareg 7L Transfer Box Control Unit Module ECU 0AD927755BG

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9267456

Control Unit BMW F10 F11 Body Module ECU JBBFE IIIR V2 PL6 ECU 9267456

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9G9T-14B534-BB

Ford Mondeo Mk4 Door Window Control Rear Left Right N/O/S 9G9T-14B534-BB

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

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