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 SLK R171 Crash Sensor Air Module Impact Control Unit A0038212851

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129004314

Door Module Mercedes W204 W212 Front Right O/S Control Unit A2129004314

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. N000000004039

Mercedes ML GLC W164 X164 W204 Additional Backup Battery 12V 1.2Ah N000000004039

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8R0907468N

Audi A5 8T Gateway Control Module Unit ECU 8R0907468N

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9240083

BMW X5 E70 X6 E71 Safety Control Unit Air Module Bag ECU Bosch 9240083

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4H0907063CF

Audi A6 C7 Board Supply Comfort BCM Body Control Module Unit ECU 4H0907063CF

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7533100

Mini Cooper One R50 Petrol W10 Engine Wiring Loom Harness Module 7533100

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9181455

BMW X1 Series E84 Antenna Aerial Noise Suppression Filter 9181455

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1698705894

Mercedes W169 W245 CD Player Radio Stereo Head Unit A1698705894

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9188582

BMW X3 F25 Holder Audio Amplifier Telephone Bracket Mount Trim 9188582

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025422619

Mercedes ML W163 Relay 4-Pin Grey Tyco A0025422619

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9257152

Telematics Bluetooth BMW F10 F20 F22 F30 Combox GPS Control Unit Module 9257152

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025421319-1

Mercedes W204 Genuine Universal Car Relay 4-Pin Hella Black A0025421319

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. E87-E90-PLUG-SOCKET-LOOM-PDC

BMW E81 E82 E87 E88 E90 E91 E92 Plug Socket Loom PDC Parking Sensor

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7374942

BMW F20 F21 F30 F31 Fuel Pump Control Unit Module 7374942

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9065410400

Battery Bracket Mercedes Sprinter W906 W910 Mount Trim Holder A9065410400

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9163348

BMW E81 E87 E90 E91 Hands-free Electronics Charging MULF2 9163348

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9324779

BMW F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM LR-01 9324779

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 02M911024J

Volkswagen Golf 7 Audi A1 A3 Seat Ibiza Petrol Engine Starter Motor 02M911024J

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7522284-1

Mini Cooper One R50 R52 W10 1 Battery Cable Plus Pole 7522284

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1569007702

Signal Actuation Module Mercedes W176 W246 SAM Control Unit ECU A1569007702

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8U0955559B

Audi A5 8T Windscreen Rain Sensor Control Unit 8U0955559B

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5M0907357C

Volkswagen VW Tiguan 5N Headlight Range Control Unit Module ECU 5M0907357C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 06F903023C

Audi Volkswagen Seat Skoda Engine Alternator Generator 06F903023C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6G9T-14B192-DA

Ford Galaxy Mondeo Transit Relay 4-Pin Black FoMoCo Unit 6G9T-14B192-DA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9365833

Business Navigation BMW F20 F21 F30 F31 Sat Nav Head Unit Player 9365833

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9230046

BMW 1 2 SERIES F20 F20N F21 F22 UNDER CAR POSITIVE BATTERY LEAD CABLE 9230046

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118705426

Rain Sensor Mercedes W211 C219 Front Windscreen Control Unit A2118705426

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9288304

FEM Module BMW F20 F21 F22 F30 F31 F32 F36 Control Unit 9288304

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1489994

Mini R50 R52 Starter Motor Engine W10 0,9KW Bosch Actuator 1489994

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0035422319

Mercedes W176 W246 Relay Battery Decoupling 12V A0035422319

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6909776

BMW X5 Series E53 Control Element Light Switch 6909776

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045400708

Mercedes-Benz W204 Parking Sensor Wiring Cable Harness Rear PDC A2045400708

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6786139

BMW 5 7 Series E60 E65 Control Unit Dynamic Drive Front Axle Suspension

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0955557A

VW Volkswagen Audi Seat Skoda Airbag Crash Impact Sensor SRC 1K0955557A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8621839

BMW F20 F21 F30 LCI G30 B38 B48 Starter Motor Engine Petrol 8621839

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9200503

BMW E60 LCI F01 F07 F10 ECU USB Hub Control Unit Module 9200503

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2139004119

Module Mercedes W205 Drivetrain Gearbox Control Module Unit A2139004119

€104.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049005908-2

Mercedes W204 Navigation CD Player COMAND Radio Sat Nav Head Unit A2049005908

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8T0907468AD

Audi A4 B8 Gateway Interface Control Unit Module ECU 8T0907468AD

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9273188

BMW E81 E87 E90 LCI Professional Navigation Car Radio Player CIC 9273188

€237.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0061510301

Mercedes W169 W245 Petrol Engine Starter Motor M266 A0061510301

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8X0959792H

Audi Q3 8U Door Module Front Door Left N/S Control Module 8X0959792H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9068204126

Mercedes Sprinter W906 Door Module Front Right O/S Control Unit A9068204126

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465407832

Battery Cable Mercedes W176 W246 Positive Wiring Starter Harness A2465407832

€170.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9197002

BMW X5 Z4 E70 E89 HiFi Stereo Audio Sound System Amplifier 9197002

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4F0907637A

Audi A6 C6 Yaw ESP Rate Sensor Module Unit Control ECU 4F0907637A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 420919275-IWH

Audi A4 A5 Q7 Rear Bumper PDC Parking Sensor Ibis White - Y9C 420919275

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A6459060800

Starter Motor Mercedes W176 W246 C117 Diesel Engine Denso A6459060800

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6985878-1

BMW 5 Series E60 E61 LCI Actuator Fuel Filler Flap Lock 67116985878 6985878

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9284331-3

Roof Light Mini R55 R56 R60 R61 Operating Control Unit Switch 3455632

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465410005

Mercedes W176 W246 Battery Cover Fuse Box Trim Panel Lid A2465410005

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025450801

Fuse Holder Mercedes W169 W245 W906 Electrical Fuse Box Bracket A0025450801

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9382516

PDC Module BMW F15 F16 F25 Mini F55 F56 Parking Assistant Control Unit 9382516

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0025450901

Mercedes W169 W245 W906 Fuse Holder Electrical Fuse Box Bracket A0025450901

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9259466

BMW 1 3 4 Series F20 F21 F30 F31 F32 Power Distribution Fuse Box Rear

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7514342

BMW E34 Z4 E85 Base B Terminal Point Engine Compartment 7514342

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 3Q0907530G

Audi S3 8V Central Gateway Control Unit Module Relay ECU 3Q0907530G

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0325453132

Gearbox Module Mercedes SLK R171 Automatic Transmission Unit EGS A0325453132

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2218700092

Mercedes W203 W221 Rain Light Sensor Control Module A2218700092

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118703226

Mercedes W245 Bluetooth Control Unit Module Hands Free A2118703226

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. GX73-14B526-AC

Land Rover Discovery L550 Voltage Converter Control Module Unit GX73-14B526-AC

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8T0035462

Audi A5 8T MMI Multimedia Interface Unit Module Control ECU 8T0035462

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9367350

KaFAS Camera BMW F10 F20 F30 Mini F55 F56 Front Control Unit Module ECU 9367350

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A1179001802

Mercedes W176 Air Module Belt Locking System Control Unit Module ECU

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5M5T14B192CA

Ford Transit Custom Relay 4-Pin Black 12V 40A FOMOCO SET 5M5T14B192CA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8583451

BMW F20 F21 F30 LCI F32 Engine Starter Motor Diesel B37 B47 8583451

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8576341

BMW F20 F21 F30 F31 118d 318d 143HP N47N Engine Control ECU DDE 8576341 Manual

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2661503033

Mercedes W169 W245 M266 Petrol Engine Wiring Harness Loom A2661503033

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2079013700

Mercedes-Benz E-Class W207 Windscreen Windshield Rain Sensor Control Unit

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2609060100

Mercedes C118 W177 W247 M260 Petrol Engine Starter Motor 12V A2609060100

€56.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009000716

Mercedes Vito W447 Diesel Adblue Module Control Unit ECU A0009000716

€94.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009002308

Mercedes W447 W906 Adblue Module Exhaust Gas Control Unit ECU A0009002308

€89.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9257366

BMW 5 7 Series F01 F10 LCI Aerial Antenna Amplifier Diversity 868 MHZ 9257366

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0907530AJ

Audi RS3 8V Gateway Control Module GCM Unit ECU 5Q0907530AJ

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7181313

BMW X1 E84 E90 E91 Door Handle LED Light Lighting Left N/S 7181313

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0919294K

Audi RS3 8V PDC Parking Distance Control Sensor Module Unit ECU 5Q0919294K

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9257093

Mini Navigation Head Unit R55 R56 R57 LCI R60 R61 CHAMP 2 Sat Nav DAB 9257093

€151.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2118704926

Seat Module Mercedes W164 W203 W211 C219 Front Memory Control Unit A2118704926

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9282118

BMW F10 CAS4 Control Unit Module 9282118 61359282118

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 038971803

Volkswagen VW Caddy 2K Injector Wiring Harness Loom 038971803

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9119494

BMW E87 ECU Junction Box Body Control Module L2 61359119494 9119494

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9253563

BMW F20 F21 Wire Cable Plug Wiring Diagnostic Socket OBD 9253563

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2469050101

Mercedes W176 W246 Rear Boot Lid Tailgate Antenna Booster Amplifier

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8J0959433B

Audi TT 8J BCM Body Comfort Convenience Module Unit ECU 8J0959433B

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0959655N

Audi A4 B8 A5 8T Air Module Control Unit ECU 8K0959655N

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9216128

BMW 3 4 5 Series E92 F32 E61 LCPA Seat Belt Module ECU 9216128

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8K0959792H

Door Control Module Audi S4 A4 B8 A5 8T Front Right O/S Passenger 8K0959792H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8X0907063AB

Audi A1 8X BCM Body Control Module Power Supply Unit 8X0907063AB

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6926459

BMW X1 E81 E82 E84 E87 E88 E90 E91 E92 Climate Control Solar Sensor 6926459

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6864204

ICM Module BMW F20 F21 F30 F31 Control Unit 6864204

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9803844

Mini Cooper Countryman R60 R61 Aerial Roof Antenna Base Module 9803844

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9120788

BMW 5 Series E60 E61 Wiring Loom Harness Passenger Side 9120785

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8507885

BMW 1 3 Series F20 F30 Diesel N47N Wiring Harness Engine Gearbox Module 8507885

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2129004307

Display Screen Mercedes W204 W212 Information Navigation Dashboard A2129004307

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6798242

ICM Module BMW F10 F11 Integrated Chassis Management QL ES Control Unit 6798242

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 6819336

BMW F20 F21 F22 F30 F31 F32 F33 Fuse Box Body Control Unit Module REM V5 6819336

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9229294

BMW F20 F21 F22 F30 F31 F80 M3 USB Socket Plug Port Control Unit 9229294

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0915181H

Audi A3 8V Negative Battery Terminal Cable Harness Wiring Loom 5Q0915181H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

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