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 W907 Air Suspension Level Control Unit Module Airmatic A9079003207

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2219001804

Mercedes-Benz W221 Night Vision System Camera Module Control Unit A2219001804

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009054807

Mercedes W118 W177 W206 W247 NOX Sensor A0009054807

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1561540102

Mercedes W204 C63 AMG M156 Engine Alternator Generator BOSCH 180A A1561540102

£142.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2138203202-1

Mercedes W213 Bluetooth Adapter Plug Module MMI Control Unit ECU A2138203202

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009004613

EGR Module Mercedes W177 W205 Exhaust Gas Recirculation Unit ECU A0009004613

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0051513901-1

Kompressor Mercedes W203 W211 M271 Petrol Engine Starter Motor A0051513901

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0045468440

Mercedes W177 Power Distributor Connector Plug Unit A0045468440

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2038703589

Mercedes W203 CD Player Radio Audio Sat Nav Navigation A2038703589

£237.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2115403545

Mercedes W203 W211 Central Gateway Control Unit Module ECU

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0018209326

Mercedes-Benz E CLS Class W211 W219 Crash Sensor Left Right N/O/S A0018209326

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129001711

Mercedes W212 PDC Parking Distance Control Unit Module Sensor A2129001711

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2058200526-1

SD Card Reader Mercedes W213 S213 Multimedia USB Port Socket Module A2058200526

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0019820823

Mercedes Sprinter W907 4-Pin Relay V23074-H1605-X123 A0019820823

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1645400182

Mercedes ML W164 GL X164 Fuse Box Cover Trim Panel Cap A1645400182

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1779004106

Door Module Mercedes C118 W177 W247 Front Right O/S Control Unit A1779004106

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2465400082

Mercedes-Benz A-Class W176 Cover Equipment Electrical Fuse Box A2465400082

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2465410005

Mercedes W176 W246 Battery Cover Fuse Box Trim Panel Lid A2465410005

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009820123

Relay Mercedes W166 Voltage Dip Protection Start/Stop Relay Module A0009820123

£161.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1679008711

Mercedes W205 Front Door Module Right O/S Control Unit ECU A1679008711

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0038206326

Mercedes W221 Door Module Front Door Left N/S Control Module A0038206326

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049006003

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

£189.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2125400035

Earth Ground Cable Mercedes W204 W207 W212 Battery Starter Wiring A2125400035

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1695400132

Cable Wiring Mercedes W245 Fuel Pump Sending Unit Plug Socket A1695400132

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2465400340

Mercedes W176 Fuse Relay Box Unit A2465400340 A2469067200

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129004811

Fuse Box Mercedes W204 W212 Front Relay Control Unit SAM Module A2129004811

£142.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2098206126

Mercedes W209 Convertible Rain Light Sensor Windscreen Module A2098206126

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2215400850

Mercedes W221 Fuse Box Relay Control Unit Module A2215400850

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009067500

Alternator Generator Mercedes W204 W212 Diesel Engine Valeo 180A 14V A0009067500

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049060105

Mercedes W204 SAM Control Unit Module Fuse Box Relay Rear A2049060105

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049007806

Mercedes W204 Sound Audio Amplifier Unit Harman Becker A2049007806

£151.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2025402373

Mercedes W169 W203 W204 W211 OBD Diagnostic Plug Cover A2025402373

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2465407932

Battery Starter Wiring Mercedes W176 W246 Harness Cable Positive A2465407932

£113.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9069003903

Mercedes Sprinter W906 Central Lock Locking Control Unit Module A9069003903

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1568200089

Mercedes W176 W246 Tailgate Aerial Antenna Amplifier Unit A1568200089

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6397600704

Mercedes Vito W639 Front Left Door N/S Lock Bowden Pull Cable A6397600704

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2128201689

Mercedes W212 Antenna Amplifier Aerial Module Unit A2128201689

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1645402372

Mercedes W164 W251 Fuse Relay Module Rear Fuse Box Unit A1645402372

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1698206726

Mercedes-Benz W245 ECU Control Unit Sensor Module Airbag A1698206726

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6229000500

Mercedes W447 OM622.951 Engine Control Unit Module ECU Kit A6229000500 Manual

£189.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2038201311

Phone Adapter Mercedes W203 W211 Contact Plate Holder Telephone A2038201311

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469003014

Mercedes W176 W231 W246 Electric Parking Brake Control Unit Module A2469003014

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2465402050

Mercedes W176 Fuse Box Control Unit SAM Module Relay A2465402050

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0015424423

Parktronic Screen Mercedes W207 W212 Front Parking Sensor Display A0015424423

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2115457001

Mercedes C219 Fuse Box Control Unit SAM Module A2115457001

£94.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2465840971

Mercedes W176 Fuse Box Allocation Fuse Placement Map Card Diagram A2465840971

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-A2218205389-1

Mercedes W221 Central Audio Navi Sat Display Screen Multimedia A2218205389

£51.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2054402834

Mercedes W205 Parking Sensor Wiring Rear Bumper PDC Loom Cable A2054402834

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469000012-1

Mercedes W176 W246 Radio Head Unit COMAND Navi Player Control Unit A2469000012

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2128270006

Camera Module Mercedes W207 W212 Reversing Rear View Control Unit A2128270006

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129008825

Mercedes C204 Fuse Box Control Unit SAM Module Relay A2129008825

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6395407809

Wiring Loom Mercedes W639 Vito Cable Sliding Door Rear Left N/S A6395407809

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2711501920

Engine Wiring Mercedes W204 C207 W212 M271 Harness Loom Cable A2711501920

£113.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A6519003403-2

Mercedes W906 314CDI OM651.955 143HP Engine Unit Module ECU Kit A6519003403

£332.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2215403050

Mercedes W221 Rear SAM Fuse Box Power Distribution Control Unit A2215403050

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009002008

Mercedes W205 Body Control Module Control Unit BCM ECU Module A0009002008

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2219003504

Display Screen Mercedes W221 W216 Monitor Information Dash Dashboard A2219003504

£379.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1635400841

Mercedes W163 Battery Ground Earth Strap Cable Wiring A1635400841

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1668200075

Mercedes W205 Aerial Antenna Control Unit Keyless Go Entry A1668200075

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1728202989

Mercedes SLK R172 Roadster Antenna Amplifier Control Module A1728202989

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0005404750

Mercedes-Benz S CL Class W220 C215 Fuse Box Battery Connector A0005404750

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2389053301

Tailgate Trunk Mercedes X117 X156 W205 Boot Rear Control Module Unit A2389053301

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0008005648

Mercedes W204 Front Seat Dynamic Lumbar Air Pump Unit A0008005648

£180.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049017901-1

Rain Sensor Mercedes SLK R172 W204 Front Windscreen Control Unit A2049017901

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2711535391-2

Mercedes R171 SLK 200K 184HP M271.944 Engine ECU Kit A2711535391 Key Lock

£237.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A2038202185

Mercedes W203 Door Control Module Rear Left N/S A2038202185

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9060034099

Mercedes-Benz Sprinter W906 Front Right O/S Door Wiring Loom Harness A9060005999

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1718200386

Mercedes SLK R171 Stereo Radio CD Player Head Unit A1718200386

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469002617

Mercedes W117 W242 W246 Head Unit Audio Player Radio Sat Nav Module A2469002617

£123.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469003114

Transmission Module Mercedes W176 W246 Control Unit ECU A2469003114

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A6461509777-1

Mercedes W203 220CDI OM646.963 150HP Engine Unit ECU Kit A6461509777 Key Lock

£113.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1779061002-1

Mercedes W177 Fuse Box Power Distribution Junction Relay Unit A1779061002

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229009910

Mercedes W205 W213 C238 Seat Heating Heater Module Control Unit ECU A2229009910

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1729002113

Mercedes SLK R172 Radio Comand CD Navi Player Control Head Unit A1729002113

£165.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1569007402

Mercedes W176 W246 Body Control Module Unit Fuse Box BCM ECU A1569007402

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129000217

Mercedes W212 Radio Head Unit Navi CD Player Control Unit A2129000217

£184.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2218707385

Mercedes W221 Rear DVD Entertainment System Video Player Unit A2218707385

£303.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A1729058300

Mercedes SLK R172 Pedestrian Protection Impact Crash Sensor Module A1729058300

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2215402250

Mercedes W221 SAM Relay Fuse Box Module Control Unit ECU A2215402250

£142.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1765406109

Wiring Harness Mercedes W176 A45 AMG Petrol M133 Low Temperature Pump Adapter

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129002813

Mercedes W212 PDC Parking Distance Control Unit Module Sensor A2129002813

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1638201126

Mercedes ML W163 Windscreen Rain Light Sensor Control Module A1638201126

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1729007600

Seat Module Mercedes W204 Front Right O/S Memory Control Unit A1729007600

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2044401001

Parktronic Module Mercedes W204 PDC Parking Sensors Control Unit A2044401001

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2115450301-1

Mercedes S211 W211 W219 Fuse Distribution Box Unit A2115453901

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009051600

Mercedes W207 W212 W221 Front Windscreen Windshield Camera A0009051600

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1779007305

Audio Amplifier Mercedes C118 W177 W247 Radio Sound Burmester Unit A1779007305

£332.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. A6395400150

Mercedes Vito W639 Battery Terminal Fuse Box Control Unit Module A6395400150

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1679008311

Mercedes C238 Door Control Unit Module ECU Front Left N/S A1679008311

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229058804

Switch Sensor Cable Mercedes W205 W212 Rear Bumper Module A2229058804

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0008605903

Mercedes W204 Steering Wheel Air Module Driver's Side Black A0008605903

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1669006105

Door Module Mercedes W176 W246 Front Right O/S Control Unit A1669006105

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009004810

Adblue Module Mercedes W205 W222 C253 Exhaust Gas Control Unit ECU A0009004810

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0998200183

Keyless Module Mercedes W205 W222 ECU Door Lock Control Unit A0998200183

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2055400840

Mercedes W205 W238 Fuse Box Cover Control Unit Holder Bracket A2055400840

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2125403505

Mercedes W212 Battery Starter Alternator Wiring Harness Cable A2125403505

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1718200586

Mercedes R171 Radio CD Player Stereo Navi Media Head Unit A1718200586

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0045428718

Mercedes-Benz C E W203 W211 Parking Sensor Wiring Loom Cable Harness Front PDC

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2125403705

Mercedes W212 Battery Starter Alternator Wiring Harness Cable A2125403705

£13.95

Free delivery: Aug 27

If paid before 14:00

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