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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Audi TT TTS 8J Rear Bumper PDC Parking Sensor Wiring Loom Harness 8J0971085A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8373700-3

BMW E60 E63 E87 E90 E91 5X Relay Make Contact White Green Set 8373700

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6F0971161J

Seat Ibiza Mk5 Fr Rear Door Wiring Loom Harness Cable Wire Left N/S 6F0971161J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. K8D2-19H440-AB

Land Rover Evoque L551 Discovery L550 Keyless Control Module K8D2-19H440-AB

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1S0919275D-MOG

Audi Q3 8U PDC Parking Distance Control Sensor Monsoon Grey Metallic - X7R

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7198731-3

Mini R50 R52 R53 Headlight Headlamp Plug Wiring Harness Cable Left N/S 7198731

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 57A971095C

Skoda Karoq NU7 Mk1 Front Bumper Wiring Loom Harness Parking Sensors 57A971095C

€118.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2098209610

Mercedes CLK W209 Convertible Alarm Anti Theft System Control Unit A2098209610

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9810737980-1

Citroën Relay 35 L Fuel Pump Carrier Bracket Holder Housing Cover 9810737980

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 0C8927750D

VW Touareg 7P Automatic Transmission Module Control Unit ECU 3.0 TDI 0C8927750D

€332.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971688AG

Audi A4 B8 Door Wiring Harness Loom Rear Right O/S Cabling 8K0971688AG

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L5907401-1

Porsche Cayenne 9PA 3.0 TDI CASA 239HP Engine ECU Kit 7L5907401 Key + Ignition

€617.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. MB3T-14301-BD

VW Amarok Mk2 Battery Negative Minus Cable Connector Wiring Loom MB3T-14301-BD

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. FR3T-14D644-CF

Ford Mustang Mk6 Headlight Module Control Unit ECU FR3T-14D644-CF

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6840094

BMW X1 F48 Rear Door Wiring Loom Harness Cable Left N/S 6840096

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3R0971073

Seat Exeo 3R Front Frame Panel Wiring Harness Cable 3R0971073

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F0035503E

Audi A4 B8 Transmitting Receiving Unit Road Toll System 4F0035503E

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5E3907159F

Skoda Octavia IV Impact Sound Control Module Unit ECU 5E3907159F

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9078280000

Mercedes W906 W907 Radio Antenna Rod Roof Antenna A9078280000

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906023PP-2

Audi A3 8P 1.6 TDI 105HP CAYC Engine Control ECU Kit BCM Key 03L906023PP Manual

€132.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1698200611

Mercedes W245 Bluetooth Module Telephone Control Unit A1698200611

€89.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2201L720P

Audi A4 B8 A5 8T Android Auto Carplay Display Screen 4+64 2201L720P

€165.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. YWC500312

Land Rover Discovery 3 L319 Parking Aid Module ECU Control Unit YWC500312

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6R0971537H

Audi A1 8X Negative Battery Terminal Cable Wiring 6R0971537H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. DPLA-14D620-AB

Range Rover Sport L405 Rear Door Control Module Unit Right O/S DPLA-14D620-AB

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1H5951253

Volkswagen Touareg 7L Relay Alternator Alarm Black 4 Pin 12V No 143 1H5951253

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2059007615

Module Mercedes W205 Air Conditioning Control Module A2059007615

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2514401909

Mercedes W164 W251 Wiring Loom Cable Harness Door Front Left Right A2514401909

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3B0K-40104

Ford Ranger Mk6 Additional Fuse Box Relay Box Module Unit TKE4180109A

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0907355C

Audi A7 4G A8 D4 Ad Blue Control Unit Module ECU 3.0 TDI Diesel 4H0907355C

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1185402504

Mercedes C118 Door Harness Rear Left N/S Door Wiring Loom A1185402504

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4B0959643E

Audi A3 8P Crash Impact Airbag Sensor Unit Module Air Bag 4B0959643E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. FK72-19C299-AB

Range Rover Evoque L538 Dashboard Display Screen Sat Nav FK72-19C299-AB

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. KK2T-19L540-AD

Ford Transit Custom Mk8 Sliding Side Door Wiring Loom Left N/S KK2T-19L540-AD

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. AV1T-14026-AAB

Ford B-MAX Door Wiring Frame Assy Jumper Rear Left N/S AV1T-14026-AAB

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9153418-1

BMW 5 Series F10 F11 B Plus Distributor Box Front Battery Cable Unit 9153418

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H22-14A614-EA

Land Rover Discovery 4 Driver's Seat Memory Wiring Loom Harness 4H22-14A614-EA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. FK72-14632-BCD

Land Rover Discovery Sport L550 Door Wiring Rear Right O/S FK72-14632-BCD

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. LR072286

Land Rover Discovery Sport L550 Tailgate Opening Sensor Upper FK72-14E108-AA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7P6035552A

VW Touareg 7P Antenna Amplifier Signal Booster Module Rear Right O/S 7P6035552A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8U0971036

Audi Q3 8U Door Loom Wiring Harness Cable Front Passenger Side N/S 8U0971036

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8U0955559

Audi A1 8X A3 8V Windscreen Rain Sensor Control Unit 8U0955559

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7636937

Ping Sensor BMW F20 F31 LCI Mini F55 F56 Engine Block Knock Sensor 7636937

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5QA919294E

Volkswagen Golf Mk7 5G PDC Parking Sensor Control Module ECU 5QA919294E

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1669063301-2

Mercedes ML W166 Rear Tail Light Lamp Wiring Harness Cable Left N/S A1669063301

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7PP905852C

Porsche Cayenne 92A Steering Column Locking Control Unit Module 7PP905852C

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0919283B

PDC Module Audi A3 8V Seat Leon Skoda Octavia Parking Control Unit 5Q0919283B

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A6394405009

Wiring Loom Mercedes W639 Vito Cable Door Wiring Cable A6394405009

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2048208526

Mercedes W204 Parking Sensor Parktronic Display Control A2048208526

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. L8A2-14D374-CE

Range Rover L560 AirBag Control Air Module Unit SRS ECU L8A2-14D374-CE

€132.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2469007314-1

Mercedes CLA C117 Central Display Screen Multimedia Sat Nav Unit A2469007314

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5J0951172

Skoda Fabia 5J Interior Roof Alarm Sensor Ultra Sonic Module 5J0951172

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9219646

BMW X5 E70 Front Bumper Park Sensor PDC Wiring Harness Cable Loom 9219636

€80.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2129005401

Mercedes W207 Fuse Junction Box Relay Control Unit Module SAM A2129005401

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0035186P-1

VW Volkswagen Golf Mk5 Passat B6 Radio CD Player Head Multimedia Unit 1K0035186P

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A6461509777-2

Mercedes C209 Engine Control ECU 2.1 Diesel 150 HP A6461509777 Automatic KIT

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7545165

BMW E87 E90 116i 316i Petrol N45 Wire Wiring Harness Engine Gearbox Mod Loom

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0035507L

VW Volkswagen Scirocco Mk3 Roof Top Antenne Control Unit Module 1K0035507L

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8582280-3

BMW F20 F21 116d N47N 116HP ECU Kit DDE 8582280 + Key + Lock + FEM Manual

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0009008718

Climate Control Module Mercedes W205 W213 Air Conditioning A/C Unit A0009008718

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6935600

BMW E81 E82 E87 E90 E91 PDC Parking Ultrasonic Sensor Sonora Metallic 6935600

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1725403405

Mercedes R172 OM651 Diesel Alternator Wiring Harness Cable Loom A1725403405

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0959792N

Audi Q5 8R Door Lock Control Module Unit ECU Front Left N/S 8K0959792N

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7558911

BMW 1 Series E81 E82 E87N E88 NOx Cable Wiring Petrol 7558911 12517558911

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A907159

Audi Q3 RSQ3 F3 Body Sound Impact Control Module ECU 83A907159

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8642705-1

Mini Cooper F56 B38 136HP Engine Control ECU DME Kit 8642705 Automatic

€227.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9361589

BMW 2 F45 Active Tourer Door Wiring Loom Harness Cable Driver's Side 9361600

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0907412

Audi A8 D4 Ambient Lighting Control Module Unit ECU 4H0907412

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1167294

Mini Cooper One R50 R52 Fresh Air Recirculating Actuator 1167294 6NN007626

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0907705J

Porsche Cayenne 92A Steering Column Control Module Unit 4H0907705J

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0907468AA

Audi S4 B8 Diagnostic Interface Gateway Control Module Unit ECU 8T0907468AA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8514577

BMW X3 F25 Diesel N47N Engine Gearbox Wiring Loom Harness 8514577

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2129060005-1

Mercedes W212 Fuse Box Module Rear Relay Electric Control Unit SAM A2129060005

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. R8D2-14A614-CA

Range Rover Evoque L551 Steering Gear Wiring Loom Harness Cable R8D2-14A614-CA

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9283429

BMW E90 E91 E92 E93 LCI Radio CD Player Multimedia Head Unit 9283429

€569.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7823651

BMW F10 F11 Engine Wiring Loom Cable Harness Injector Module 520d N47N 7823651

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 382327

Ultrasonic Module Mini Countryman Paceman R60 R61 Alarm System Sensor 0382327

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1715400406

Mercedes SLK R171 Window Lifter Lift Mechanism Cable Wiring Harness A1715400406

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0971068F

VW Volkswagen Tiguan 5N AD BT Exhaust Flap Wire Harness Loom 5Q0971068F

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6807332

BMW G30 530e 530eX B48X Hybrid Battery Wiring Positive Under Floor Cable 6807332

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V0919129B

Volkswagen Golf Mk7 Audi A3 8V TV Tuner ECU Control Module 8V0919129B

€161.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. LR012048

Land Rover Range Rover Evoque L538 Battery Hold Down Bracket Mount LR012048

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2129004901

Fuse Box Mercedes W212 Rear SAM Relay Control Unit Module A2129004901

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7PP907064KG-1

Porsche 718 Boxster 982 Body Comfort Module Control Unit 7PP907064KG

€118.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3Q0951253

Skoda Karoq Mk1 Octavia Mk3 Audi A1 8X Q3 F3 4 Pin Power Relay 3Q0951253

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F0907283

Audi A6 C6 FL Tire Pressure Control Module 4F0907283

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A4519005400

Smart A451 Transmission Control Unit ECU 71HP 1.0 Petrol A4519005400 Manual

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8R0867749A

Porsche Macan 95B Battery Holder Strap Mounting Bracket Clamp 8R0867749A

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7571142-1

Mini Cooper R55 R56 R57 Battery Cable Wiring Lead Power Positive 7571142

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L0971537

Porsche Cayenne 9PA Negative Battery Terminal Cable Wiring Loom 7L0971537

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 02Z911024L

VW Volkswagen Golf Mk7 1.6 TDI CLHA Diesel Engine Starter Motor 02Z911024L

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9279391

BMW 5 G11 G30 M5 Door Crash Sensor Front 9279391

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. BV21-12A650-ACD-1

Ford Fiesta Mk7 1.4 TDCI 70HP KVJA Engine Control ECU BV21-12A650-ACD Manual

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4N0955557A

Audi A6 C8 A7 C8 Door Crash Impact Sensor Front Left N/S Side 4N0955557A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. BV6T-14297-AAG

Ford Focus Mk3 Windscreen Heated Washer Jet Wiring Harness Cable BV6T-14297-AAG

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8583423

Mini D R60 R61 ALL4 N47N 112HP Engine ECU Control Unit DDE 8583423 Manual

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906019AG-1

Audi A6 C6 2.0 TDI CAHA 170HP Engine ECU Kit 03L906019AG Ignition + Key Manual

€189.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. AG9N-10723-AC

Land Rover Freelander 2 L359 HV Battery Tray Holder Bracket AG9N-10723-AC

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7P6035552

VW Touareg 7P Antenna Amplifier Signal Booster Module Rear Left N/S 7P6035552

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

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