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 W221 Door Harness Left Right N/O/S Rear Door Wiring Loom A2215408335

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2044409005

Mercedes W204 Battery Wiring Starter Alternator Wiring Harness A2044409005

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2195404605

Mercedes C219 Rear Bumper PDC Wiring Parking Sensor Loom Harness A2195404605

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059000017

Mercedes W176 W205 W212 Telematics Communication Control Module ECU A2059000017

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519007003-5

Mercedes W176 A200 CDI Engine ECU Kit OM651 136HP A6519007003 Automatic

€189.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009061705

Mercedes W205 C63 Petrol Engine 14V 200A Alternator Generator Unit A0009061705

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118703126

Headlight Module Mercedes C209 W211 CLS C219 Level Control Unit ECU A2118703126

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2474703702

Mercedes W177 W247 Solenoid Valve Line Pipe Hose Starter A2474703702

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2468200035

Mercedes-Benz A-Class W176 Mikrophone Roof Control Module A2468200035

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2128300008

Fan Blower Mercedes W212 Comand Navi CD Control Unit Module Cooler A2128300008

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2185402110

Mercedes C218 USB AUX Socket Port Cable Harness Wire Cable A2185402110

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1669063901

Mercedes ML W166 Relay Module Box Under Rear Right Seat F4 A1669063901

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0035420819

Mercedes W176 W205 W213 W242 W447 W907 Relay 4-Pin Black Tyco Unit A0035420819

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229002009

Mercedes W205 W222 Door Module Control Unit Rear Left N/S A2229002009

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2075404207

Mercedes W204 M276 NOX Sensor Adapter Right O/S Harness Wiring Cable A2075404207

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1765409502

Mercedes W176 Centre Console Wiring Harness Cable A1765409502

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055405393

Mercedes W205 Electrical Wiring Harness Loom A2055405393

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059000146

Mercedes W205 Display Screen Instrument Cluster Speedo Meter Sat Nav A2059000146

€455.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1679004211

Door Module Mercedes W205 W213 W910 Front Right O/S Control Unit ECU A1679004211

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6394404906

Mercedes-Benz Vito W639 Loudspeaker Cable Wiring Loom Harness A6394404906

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1635400734

Mercedes-Benz M ML W163 Rear Left Right Door Wiring Loom Harness A1635400734

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215450601

Mercedes W221 Dashboard Fuse Box Front Left N/S Control Module A2215450601

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1775405501

Mercedes W177 Door Harness Loom Cable Wiring Rear Left Right N/O/S A1775405501

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2044401038

Mercedes C204 Front Door Electric Wire Harness Loom Cable Connector A2044401038

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2661530891-1

Mercedes W169 A150 95HP M266.920 Engine ECU Kit Lock 2 Keys Barrel A2661530891

€265.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2075402213

Mercedes C207 Door Cable Wiring Loom Front Right Door O/S A2075402013

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2075404107

Mercedes W204 M276 NOX Sensor Adapter Left N/S Harness Wiring Cable A2075404107

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2721503933

Engine Wiring Mercedes C209 272960 Petrol Module Loom Harness Cables A2721503933

€123.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049002002

Mercedes W204 C207 Air Suspension Dynamic Level Control Unit Module A2049002002

€45.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729050151

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6398201389

Mercedes W639 Radio Navigation CD Player System Head Unit A6398201389

€336.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2044400102

Mercedes W204 Airmatic Air Suspension Control Unit Module ECU A2044400102

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059000327

Mercedes C205 Differential Lock Control Module Unit ECU A2059000327

€146.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129004001

Mercedes W212 Fuse Box Control Unit Module SAM Relay Electrical Unit A2129004001

€161.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009068802-4

Mercedes Sprinter W906 Alternator Generator FAL1121 A6511540000

€142.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2223411000

Mercedes W205 W222 High Voltage Connector Cover Cap A2223411000

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055451500-1

Mercedes W205 W213 C238 Battery Terminal Starter Alternator Wiring A2055451500

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519004500-1

Mercedes W205 C220d 651.921 170HP BlueTEC Engine ECU Kit A6519000603 Key SAM

€332.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1779007305

Mercedes C118 W177 W247 Audio Amplifier Radio Sound Burmester Unit A1779007305

€218.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6401501091

Mercedes W169 W245 OM640.941 140HP Engine Control ECU A6401501091 Automatic

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A4475401011

Mercedes W447 Horn Signal Wiring Connector Electrical Cable A4475401011

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025428819-1

Mercedes W176 W246 Relay Current 4 Pin 12V Hella A0025428819 Set x2

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1729005507-1

Mercedes R172 Head Unit Radio CD Player Multimedia Audio A1729005507

€156.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0015452516

Mercedes W207 Automatic Gearbox Module EGS Control Unit ECU A0015452516

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2219005503

Mercedes W221 Air Suspension Module Regulation Control Unit A2219005503

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229004213

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009059300-KB

Mercedes W205 W212 W246 Parking Distance Sensor Parktronic Black 191 A0009059300

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2125407605

Door Wiring Mercedes W212 Loom Cable Rear Left Right N/O/S A2125407605

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0055461340

Mercedes W447 Energy Distributor Plug Module A0055461340

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059006651

Mercedes C205 GLC C253 Body Control Comfort Module Unit SAM BCM A2059006651

€398.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215407307

Mercedes W221 Rear Door Wiring Loom Harness Cable Left N/S A2215407307

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055408004

Mercedes W205 Alternator Wiring Harness Loom C300h Diesel OM651 A2055408004

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2056100534

Mercedes W205 Battery Support Protection Bracket Tray A2056100534

€23.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. A2048701826

Mercedes S204 Door Module Front Left N/S Control Unit ECU A2048701826

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 283930431R

Roof Microphone Mercedes Citan W415 Interior Mic Unit Wiring Cable 283930431R

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229003619

Mercedes W205 W213 W222 Radio Sat Nav Head Unit A2229003619

€522.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1665459340

Mercedes W166 C292 Fuse Box Relay Control Unit Module A1665459340

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059000227

Mercedes C205 Vehicle Dynamics Suspension Control Module ECU A2059000227

€132.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9068270005

Mercedes W639 W906 Voltage Stabilizer Control Unit Module A9068270005

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2044406135

Mercedes W204 Door Harness Loom Cable Wiring Rear Right O/S A2044406135

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055401516

Mercedes W205 Battery Cable Negative Lead Wiring Harness Control A2055401516

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0019820823

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2214407910

Mercedes W221 Rear Door Wiring Loom Harness Cable Left Right N/O/S A2214407910

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6519007500-9

Mercedes W204 C200 CDI BlueEFFICIENCY 651.913 136HP ECU Kit A6519007500 Key Lock

€170.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1669005417

Mercedes X117 Communication Telematics Control Module Unit ECU A1669005417

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2389009000

Air Module Mercedes A205 A238 A217 SRS Protection Control Unit A2389009000

€99.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2709000900-10

Mercedes W176 A 180 270.910 122HP Blue Efficiency ECU Kit A2709000900 Automatic

€379.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2205400282

Mercedes CL S Class C215 W220 Fuse Box Unit Cover Front Left A2205400282

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009000646

Mercedes C118 C167 W177 W247 Parktronic Parking Control Unit Module A0009000646

€284.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0008200806

Mercedes Vito W639 Rear Air Conditioning Wiring Harness Loom A0008200806

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2048701226

Mercedes S204 Door Module Rear Right O/S Control Unit ECU A2048701226

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6401500734-2

Mercedes W169 W245 OM640.941 140HP Engine Control ECU Kit A6401500734 Automatic

€189.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2125403100

Mercedes W212 Rear Parking Sensor PDC Wiring Harness Loom A2125403100

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0045450201-1

Mercedes Sprinter W906 Fuse Prefuse Box Relay Electrical Unit A0045450201

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009063822-1

Alternator Generator Mercedes W176 W246 Diesel Engine Bosch 175A A0009063822

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215409107

Mercedes W221 Instrument Panel Illumination Wiring Harness Cable A2215409107

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1705451240

Mercedes R170 C215 W220 W463 Engine Control Module Holder Bracket A1705451240

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1679006613

Mercedes W177 Sliding Roof Module Sunroof Panoramic Control Unit A1679006613

€85.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1665400141

Mercedes W166 Petrol Engine HV Battery Earth Ground Line Cable Wire A1665400141

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0015467435

Battery Cover Mercedes W906 Battery Positive Pole Cover Red A0015467435

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6399001001

Mercedes W639 PDC Parking Park Sensor Distance Control Module A9064460046

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2466200514

Mount Support Mercedes W176 Battery Bracket Holder A2466200514

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9065420044

Mercedes W906 Bracket Mount Fuse Distribution Box A9065420044

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465407711

Mercedes W176 Door Harness Loom Cable Wiring Rear Left Right N/O/S A2465407711

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055404003

Mercedes W205 Starter Alternator Wiring Harness Loom Cable OM651 A2055404003

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055407916

Mercedes W205 Battery Ground Earth Cable Wire 3.0 Petrol C43 A2055407916

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6511508300

Engine Wiring Mercedes W910 OM651.958 Diesel Harness Loom Cable A6511508300

€170.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2048701126

Mercedes S204 Door Module Rear Left N/S Control Unit ECU A2048701126

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2048207485

Mercedes W204 Front Door Control Unit Module Right O/S A2048207485

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229001609

Mercedes W222 Sound Amplifier Control Unit Module ECU A2229001609

€379.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0465455728

Mercedes A207 W212 S212 Wiring Harness Plug Connector Black 2-Pin A0465455728

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1644403801

Mercedes ML350 W164 Gateway ECU Control Module Unit A1644403801

€303.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1644400650

Mercedes W164 W251 Front Wiring Loom Harness Seat Cable Loom A1644400650

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2229063302

Fuse Box Mercedes W205 W222 Engine Compartment SAM Module Relay Unit A2229063302

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2909003001

Mercedes C238 E53 4matic Transfer Case Torque Distribution Control ECU

€379.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2059008015

Mercedes W205 W447 Radio Multimedia Head Unit Cd Player A2059008015

€474.95

Free delivery: Sep 22 – 24

If paid before 14:00

Part no. A4475450069-2

Mercedes Vito W447 Control Unit Fuse Box Compartment Mount A4475450069

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0325453032

Mercedes W220 Automatic Gearbox Control Unit Module ECU A0325453032

€123.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009050110

Mercedes W204 W212 W221 Blind Spot Radar Sensor Left Right N/O/S A0009050110

€270.95

Free delivery: Sep 23 – 24

If paid before 14:00

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