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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Interface Cable Mercedes W169 W204 USB AUX Audio Iphone Media A0018278204

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0038212751

Mercedes-Benz M S W221 ML W164 Airbag Impact Crash Sensor Door A0038212751

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2038201585

Mercedes W203 Door Control Module Front Left N/S A2038201585

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469003615

Mercedes GLA X156 Tailgate Lift Boot Lid Control Unit Module A2469003615

£61.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229000905

Mercedes W205 PDC Park Assist Control Module Ecu A2229000905

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9060034199

Mercedes-Benz Sprinter W906 Front Left N/S Door Wiring Loom Harness A9060005999

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2055403706

Mercedes W205 Front Axle Damper Adjustment Left N/S Wiring Harness A2055403706

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0015424623

Mercedes A207 W204 W212 Front Parking PDC Display Panel A0015424623

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009069905

Mercedes W205 W213 Engine Alternator Generator M264 Petrol A0009067703

£132.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A9068201989

Mercedes W639 W906 COMAND Navigation Head Unit Radio Sat Nav Screen A9068201989

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2079011800

Mercedes W204 W207 Control Unit ECU Sensor Module Air SRS Bag A2079011800

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1729006008

Mercedes W204 W212 W176 Media Interface Control Unit Module A1729006008

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229063202-1

Fuse Box Mercedes W205 W222 Electrical Relay Box Module Unit A2229063202

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0038202926

Mercedes W164 X164 W221 SRS Airbag Impact Crash Sensor A0038202926

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229009811

Mercedes W205 W222 Air Suspension Module Control Unit ECU A2229009811

£113.95

Part no. A6421508900-1

Mercedes W212 E350 CDI OM642.852 Engine Control Unit Module ECU A6421508900

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2709002100-12

Mercedes W176 M270.910 122HP Engine Control ECU Kit A2709002100 Automatic

£284.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A1729007500

Mercedes W204 Seat Module Memory Control Unit Front Left N/S A1729007500

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0025428918

Mercedes-Benz C M Class W163 W203 ESP Yaw Rotation Rate Sensor A0025428918

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0015454416

Mercedes CL203 M271 Automatic Gearbox EGS Control Module Unit ECU A0015454416

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2465401205

Mercedes-Benz A B W176 W246 Left N/S Parking Brake Electrical Wiring Cable

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2465410205

Mercedes W176 W246 Battery Box Trim Housing Cover Support Panel A2465410205

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A1715402534

Mercedes SLK R171 Battery Cable Starter Alternator Wiring Harness A1715402534

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2139000414

Camera Module Mercedes W213 S213 Parking Rear View Control Unit A2139000414

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0025421419

Mercedes W163 W169 W203 W210 Relay 5-Pin Yellow TYCO A0025421419

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2118705026

Passenger Seat Module Mercedes W164 W203 W211 Memory Control Unit A2118705026

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1765401602

Mercedes W176 Rear Bumper PDC Wiring Parking Sensor Loom Harness A1765401602

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2711541402

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

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6519007600-2

Mercedes W176 A200 CDI BlueEFFICIENCY OM651.901 Engine Module ECU A6519007600

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2135405542

Mercedes W205 Electrical Wire From Transmission To Body Ground Cable A2135405542

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129001806

Mercedes A207 C207 SAM Control Unit Module Fuse Box Rear A2129001806

£113.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A1698203185

Mercedes-Benz A B Class W169 W245 Door Control Module Left Rear N/S A1698203185

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2465402005

Mercedes-Benz A W176 Front Right Door Cable Wiring Loom Harness O/S A2465402005

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1776204201

Mercedes C118 W177 W247 Battery Box Trim Housing Cover Support A1776204201

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1715450201

Fuse Box Mercedes SLK R171 Roadster Fuse Relay Box Control Module A1715450201

£161.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2518701889

Antenna Amplifier Mercedes W164 W251 Aerial Control Unit Module A2518701889

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2139065706-1

Fuse Box Mercedes W205 W213 Front Engine Compatment Relay Module A2139065706

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1645450216

Mercedes ML W164 PDC Module Parking Distance Control Unit Sensor A1645450216

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9075406849

Mercedes Sprinter W907 Ground Line Battery Earth Cable Wire A9075406849

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2059005222

Seat Module Mercedes W205 W253 Memory Control Unit Passenger's Side A2059005222

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6519003403-1

Mercedes W906 314 CDI OM651 Engine Module ECU Kit A6519003403 Automatic

£379.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2079053300

Mercedes-Benz W207 Cabrio A207 Rear Left N/S Radio Aerial Antenna Amplifier

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2215420417-MB

Parking Sensor Mercedes W169 W204 W212 PDC Sensor Front Mountain Gray 787

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2218707526

Mercedes W221 Air Module Control Unit ECU SRS Module A2218707526

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129004711

Fuse Box Mercedes W204 W212 Front Relay Control Unit SAM Module A2129004711

£132.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1729008600

Mercedes W204 Display Screen Multimedia Navigation Dashboard Unit A1729008600

£42.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009006318

PDC Module Mercedes W205 W213 W247 Parking Assistant Parktronic Unit A0009006318

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0045452905

Mercedes Relay Fuse Unit Module 4 Pins Grey A0045452905

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2038206385

Mercedes-Benz C-Class W203 Airbag System Control Unit Module ECU A2038206385

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1645402830

Mercedes ML W164 Battery Positive Cable Wiring A1645402830

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229004213

Keyless Module Mercedes W205 W213 C253 ECU Door Lock Control Unit A2229004213

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0075420418

Yaw Module Mercedes W204 Rotation Rate Acceleration Sensor A0075420418

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049000902-1

Fuse Box Mercedes W204 Rear SAM Relay Fuse Box Control Module A2049000902

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229005914

Mercedes W205 Rear SAM Module Control Unit A2229005914

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2025402373-1

Mercedes A C E Class 1 W169 W203 W211 OBD Diagnostic Plug Cover A2025402373

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2059004721

Door Module W205 Rear Right O/S Door Control Unit Module A2059004721

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469003417

Parking Brake Module Mercedes W176 W231 W246 Electric Control Unit A2469003417

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2045458201

Mercedes W204 Rear Fuse Box Relay SAM Control Unit Module A2045458201

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6519007003

Mercedes W176 A200 CDI OM651 136HP Engine Module ECU Unit A6519007003 Automatic

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469008510

Body Control Module Mercedes W117 W176 W242 W246 Fuse Box Sam A2469008510

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2078202910

Seat Control Module Mercedes A207 W207 Cabrio Rear Control Unit ECU A2078202910

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2118700110

Mercedes W219 Hood Bonnet Light Solar Sensor Module A2118700110

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2055401924

Mercedes W205 Centre Console Wiring Harness Cable Loom A2055401924

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A4155402408

Door Wiring Mercedes W415 Citan Cable Front Left N/S Harness Loom 241257541R

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2045457001

SAM Module Mercedes W204 Control Unit Electrical Fuse Box Unit A2045457001

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2465406607

Positive Cable Mercedes W176 W246 Battery Lead Plus Pole Red A2465406607

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1729001506

Mercedes R172 Convertible Roof Control Module ECU A1729001506

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6395450203

Mercedes-Benz Vito W639 Fuse Box Cover Cap Trim A6395450203

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2115455301

Fuse Box Mercedes W211 Rear Trunk Module Relay Fuse Box SAM A2115455301

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229005315

Bluetooth Module Mercedes W176 W205 Multimedia Control Unit ECU A2229005315

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009003806

Mercedes W205 Park Parking Assist PDC Distance Control Unit Module A0009003806

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A4478260000

Mercedes Vito W447 Headlight Turn Indicator Light Socket Plug A4478260000

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0001502780

Mercedes W203 CL203 W204 M272 Petrol Ignition Coil Cable Connector A0001502780

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6429005601

Mercedes C207 Glow Plug Relay Unit Control Module A6429005601

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6511501879

Mercedes W639 OM651.940 113 CDI 136HP Engine Unit Module ECU A6511501879 Manual

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. 5DV-008-290-00

Mercedes W211 Xenon Headlight Level Control Module 5DV 008 290-00

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2115408445

Gateway Module Mercedes W169 W211 W245 W219 W203 Control Unit ECU A2115408445

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1693000204-2

Accelerator Sensor Mercedes W169 W245 YAW Rate Control Unit Module A1693000204

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009063903

Alternator Generator Mercedes W205 W213 Diesel Engine Valeo 200A A0009063903

£94.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A0009003606

Mercedes W176 W246 Automatic Transmission Control Uni A0009003606

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129004901

Fuse Box Mercedes W212 Rear SAM Relay Control Unit Module A2129004901

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009828223

Mercedes W213 Power Relay 4 Pin 12V Hella A0009828223

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1695455332

Mercedes W169 PDC Parking Sensor Distance Control Module Unit ECU A1695455332

£137.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1695407405

Mercedes W169 Wiring Loom Cable Door Front Left Right N/O/S A1695407405

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2215406645

Mercedes W221 PDC Parking Distance Sensor Control Unit Module ECU A2215406645

£132.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0025421319-4

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

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A1715400130

Mercedes SLK R171 M271 Positive Battery Cable Starter Alternator A1715400130

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6519007500

Mercedes W212 E220CDI OM651.924 Engine Unit Module ECU A6519007500 Automatic

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1775404107

Fuse Box Mercedes C118 W177 W247 Battery Relay Terminal A1775404107

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9075407312

Mercedes W907 Battery Fuse Box Positive Distribution Terminal A2479061803

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1718203926

Mercedes A B Class W169 W245 Rain Light Sensor Control Unit Module A1718203926

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1729050151

Mercedes-Benz A B Class W176 W246 Roof Towing Alarm Sensor Switch Module

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0035420219

Relay Mercedes W639 W906 5-Pin Black 12A A0035420219

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129001529

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

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0025426918

Mercedes W211 W220 Crash Sensor Left Right N/O/S A0025426918

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2661539779-2

Mercedes W169 W245 M266.920 95HP Engine Control ECU Kit A2661539779 Manual

£142.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2079057501

Mercedes E-Class W207 Cabrio A207 ITS Camera Control Unit Module ECU

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0055422718

Yaw Sensor Mercedes W211 W219 ESP Rotation Rate Control Unit Module A0055422718

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2059053414-1

Mercedes W205 Voltage Converter Regulator Control Module Unit A2059053414

£18.95

Free delivery: Aug 27

If paid before 14:00

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