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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Mercedes Vito W447 Battery Cable Alternator Wiring Diesel OM651 A4475400010

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1765401409

Mercedes W176 Roof Wiring Harness Cable Loom A1765401409

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9425426040

Mercedes Sprinter W906 Fuse Box Relay Carrier Holder Bracket A9425426040

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0061517201

Motor Engine Starter Mercedes R172 W204 C207 W212 M271 Petrol A0061517201

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6395402733

Mercedes Vito Viano W639 Electric Wiring Cable Loom Harness A6395402733

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009003606

Mercedes W176 W246 Automatic Transmission Control Uni A0009003606

€23.95

Free delivery: Sep 23 – 24

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Part no. A2139068801-1

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Unit A2139068801

€23.95

Free delivery: Sep 23 – 24

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Part no. A1175406303

Mercedes C117 Door Wiring Harness Cable Front Passenger's Side N/S A1175406303

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1664406610

Mercedes ML W166 Seat Wiring Harness Front Left Right N/O/S A1664406610

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479002707

Communication Module Mercedes W177 W247 Hermes LTE Control Unit A2479002707

€42.95

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If paid before 14:00

Part no. A2059001527

Mercedes C205 Gearbox Control Module Unit ECU A2059001527

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055403606

Mercedes W205 Front Axle Damper Adjustment Right O/S Wiring Harness A2055403606

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2038204764-1

Mercedes CL203 Rear Tail Light Lamp Wiring Cable Loom Left N/S A2038204764

€23.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. A2035450301

Mercedes-Benz C CLK Class W203 W209 Battery Terminal Fuse Box A2035450301

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059004521

Door Module Mercedes W205 GLC C253 Rear Left N/S Control Unit ECU A2059004521

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0024463140-4

Mercedes W169 A160 CDI 95HP M266.920 Engine ECU Kit A0024463140 Automatic

€222.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2115453632

Mercedes S211 W211 C219 Body Control Module ECU Passenger Side A2115453632

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055403706

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

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775402811

Mercedes W177 W243 W247 Rear Door Wiring Harness Cable Left N/S A1775402811

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139002722

Door Module Mercedes W205 W213 X253 Rear Left Door Control Unit A2139002722

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465409934

Mercedes W176 W246 Rear Door Wiring Loom Harness Left Right N/O/S A2465409934

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479009107

Rain Sensor Mercedes W118 W177 W247 Windscreen Light Control Unit A2479009107

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1698208026

Mercedes W169 Door Control Module Right Front O/S A1698208026

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1718705494

Mercedes R171 Radio Player CD COMAND Head Unit Controller A1718705494

€332.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025428719

Mercedes W176 W204 W207 W166 Relay 4 Pin Grey Hella A0025428719

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045408735

Mercedes W204 Front Seat Air Module Wiring Cable Front Right A2045408735

€23.95

Free delivery: Sep 23 – 24

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Part no. A4155404305

Microphone Cable Mercedes Citan W415 Wiring Loom Cable Harness 27083202

€56.95

Free delivery: Sep 23 – 24

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Part no. A1775405101

Door Wiring Mercedes V177 Rear Door Right Left N/O/S Harness Wire A1775405101

€23.95

Free delivery: Sep 23 – 24

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Part no. A1669009311

SAM Module Mercedes ML W166 Center Electrics Control Modul A1669009311

€189.95

Free delivery: Sep 23 – 24

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Part no. B67875835

Mercedes W203 C219 Nokia 6100 6610 6610I 7250I Mobile Phone Charger AB67875835

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049007408-1

Mercedes W204 Display Screen Information Navigation Dashboard A2049007408

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009826222

Mercedes W205 W213 W238 W253 Starter Battery 48V A0009826222

€759.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. A9076830400

Mercedes W907 Fuse Box Relay Cover Lid Control Unit Bracket Trim A9076830400

€23.95

Free delivery: Sep 23 – 24

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Part no. A1725400433

Electric Wire Mercedes SLK R172 M271 Alternator Prefuse Box Wiring A1725400433

€28.95

Free delivery: Sep 23 – 24

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Part no. A1664400137

Mercedes W166 AdBlue Tank Reservoir Wiring Harness Loom Cable Wire A1664400137

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1725408705

Mercedes R172 Electrical Wiring Harness Cable Window Regulator A1725408705

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2198203761-1

Headlamp Mercedes W219 Headlight Xenon Light Front Left N/S Harness A2198203761

€23.95

Free delivery: Sep 23 – 24

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Part no. A1668200400

Mercedes GLE W166 C292 Front Seat Occupancy Sensor Wire Harness A1668200400

€89.95

Free delivery: Sep 23 – 24

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Part no. A2749003900

Mercedes Vito W447 Electronic Control Unit Module ECU A2749003900

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775409141

Mercedes W177 W243 W247 Front Door Wiring Harness Cable Driver Side A1775409141

€32.95

Free delivery: Sep 23 – 24

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Part no. A2215400305

Mercedes W221 Rear Axle Wiring Harness Loom Brake Wear Indicator A2215400305

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009006907

Mercedes W205 Tire Pressure Control Module A0009006907

€23.95

Free delivery: Sep 23 – 24

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Part no. A0009050038

Mercedes W212 Multi-Purpose Windscreen Camera Control Unit Module A0009050038

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055409229

Mercedes C205 Rear Shock Absorber Wiring Harness Cable Left N/S A2055409229

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4148200526

Mercedes Vaneo W414 Front Left Right Door N/O/S Control Unit Module A4148200526

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218708992

Mercedes W221 C216 Telephone Bluetooth Connection Control Module A2218708992

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4209008704

Mercedes Sprinter W907 W910 Stereo Media Sat Nav Head Unit A4209008704

€279.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2208216879

Mercedes W220 Rear Door Control Module Unit Right O/S A2208216879

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2198200315

Mercedes C219 Console Car Phone Voice Control Harness Wire Loom A2198200315

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0061514401

Starter Motor Mercedes W204 W211 W212 OM642 Diesel Engine A0061514401

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049009907-1

Mercedes W204 Navigation Radio Player Head Unit Computer A2049009907

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2128201789

Mercedes W212 Antenna Amplifier Aerial Module C Pillar Left N/S A2128201789

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218101817

Mercedes-Benz W221 Rear Left Right N/O/S Headlining Interior Mirror A2218101817

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059000524

Mercedes W207 W212 Telematics Services Communication Module A2059000524

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2315407410

Mercedes R231 AMG Front Brake Lining Harness Wiring Cable Right O/S A2315407410

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005459712

Mercedes W447 OM654 Power Distributor Box Conectors Socket A0005459712

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2079001200

Door Module Mercedes C207 W207 Front Right O/S Control Unit ECU A2079001200

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1665460143

Mercedes ML W166 Fuse Box Electric Distribution Control Module A1665460143

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6401500100

Mercedes W169 A160 CDI OM640.942 82HP Engine Control ECU A6401500100 Automatic

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005428418

Mercedes A B C Class W169 W203 W245 Outside Air Temperature Sensor A0005428418

€23.95

Free delivery: Sep 23 – 24

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Part no. A2139003022

Door Module Mercedes W205 W213 X253 Rear Right Door Control Unit A2139003022

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469007502

Mercedes W246 Airbag Control Module ECU Unit A2469007502

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129000204

Mercedes W212 Fuse Box Control Unit SAM Module Relay A2129000204

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229002109

Mercedes W205 W222 Door Module Control Unit Rear Right O/S A2229002109

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1769065400-1

Mercedes W176 Rear Taillight Light Lamp Side Panel Wiring Right O/S A1769065400

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2046802489

Mercedes W204 Radio Stereo CD Player Head Unit Cover Panel A2046802489

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519009002-1

Mercedes W212 E300 BlueTEC Hybrid Engine ECU Kit 204HP A6519009002 Manual

€237.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2829003300

Mercedes W177 A200 163HP M282.914 Engine Control Unit ECU A2829003300 Automatic

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2518206510

Mercedes W212 Light Sensor Sunlight Sensor Front A2518206510

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1665400180

Mercedes W166 Fuse Box Relay Cover Shield Cap Trim A1665400180

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059002314

Mercedes W205 Front Sam Comfort Control Module Unit A2059002314

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055409127

Mercedes C205 Rear Axle Wiring Harness Cable Loom Left N/S A2055409127

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0045468540

Mercedes W221 Distributor Box Block Control Unit Relay A0045468540

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1669005605

Door Module Mercedes W176 W246 Front Left N/S Control Unit VST A1669005605

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 390203254

Seat Adjustment Motor Mercedes R171 W221 Front Seat Motor Actuator 0390203254

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129066701-1

Mercedes W212 Saloon Rear Tail Lamp Light Wiring Cable Right O/S A2129066701

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229001909

Mercedes W205 W222 Door Module Front Right O/S Control Unit ECU A2229001909

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2709000900-8

Mercedes W246 B180 270.910 122HP ECU Wiring Loom Harness Cable Plug A2709000900

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2048205864-1

Mercedes W204 Rear Tail Light Wire Plug Socket Cable Right O/S A2048205864

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055457200

Mercedes W205 Radio Stereo Head Unit Mount Bracket Holder Support A2055457200

€23.95

Free delivery: Sep 23 – 24

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Part no. A4475400053

Mercedes Vito W447 Negative Battery Cable A4475400053

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049060805-1

Mercedes S204 Estate Rear SAM Control Module Unit Fuse Box A2049060805

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049009301

Mercedes W212 Media Interface Control Unit Module Multimedia A2049009301

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729051301

Mercedes SLK R172 Roadster Antenna Amplifier Control Module A1729051301

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6461501934-1

Mercedes CL203 CLC200 CDI 122HP M646.963 Engine ECU Kit A6461501934 Key Lock

€123.95

Free delivery: Sep 23 – 24

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Part no. A0015423723

Mercedes A E Class W169 W211 Parking Sensor Display Control PDC A0015423723

€23.95

Free delivery: Sep 23 – 24

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Part no. 8589948

BMW G20 G21 Positive Battery Cable Wiring Loom 8589948

€56.95

Free delivery: Sep 23 – 24

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Part no. A2205402645

Mercedes C215 W220 R230 Gateway Control Module System Diagnosis Unit A2205402645

€28.95

Free delivery: Sep 23 – 24

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Part no. A2135409916

Earth Ground Cable Mercedes W213 S213 Battery Wiring Loom Engine A2135409916

€23.95

Free delivery: Sep 23 – 24

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Part no. A1779069601-1

Fuse Box Mercedes W177 W247 Front Relay Engine Control Unit Module A1779069601

€123.95

Free delivery: Sep 23 – 24

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Part no. A0038207426

Mercedes W221 Door Module Control Unit Rear Right O/S A0038207426

€23.95

Free delivery: Sep 23 – 24

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Part no. A2078205489

Mercedes-Benz W207 A207 Left Right A-Pillar Radio Aerial Antenna Amplifier Unit

€23.95

Free delivery: Sep 23 – 24

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Part no. A2214405413

Mercedes W221 Front Door Wiring Harness Driver's Side A2214405413

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1769065000-2

Mercedes W176 Rear Tail Light Lamp Side Panel Wiring Cable Left N/S A1769065000

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2079000600

Mercedes C207 Door Module Rear Right O/S Control Unit ECU A2079000600

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0005468602

Mercedes W167 W205 W213 X253 Positive Battery Terminal Cover Cap A0005468602

€23.95

Free delivery: Sep 23 – 24

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Part no. A2135401087

Mercedes W205 W213 Battery Starter Alternator Wiring Harness OM654 A2135401087

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045451040

Mercedes W204 W212 Multimedia Interface Unit Module Bracket Mount A22045451040

€23.95

Free delivery: Sep 23 – 24

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Part no. A2129060605

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

€85.95

Free delivery: Sep 23 – 24

If paid before 14:00

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