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: Sep 15 – 16

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Part no. 8373700-3

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

€28.95

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Part no. 6F0971161J

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

€23.95

Free delivery: Sep 15 – 16

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Part no. 1S0919275D-MOG

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

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 57A971095C

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

€118.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2098209610

Mercedes CLK W209 Convertible Alarm Anti Theft System Control Unit A2098209610

€23.95

Free delivery: Sep 15 – 16

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Part no. 9810737980-1

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

€23.95

Free delivery: Sep 15 – 16

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Part no. 8K0959795D

Audi A4 S4 8K A5 Q5 Rear Door Control Module Unit Left Right N/O/S 8K0959795D

€23.95

Free delivery: Sep 15 – 16

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: Sep 15 – 16

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Part no. 8K0971688AG

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

€23.95

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Part no. 5Q0959354

Volkswagen Golf 7 Audi A3 8V Front Air Module Crash Impact Sensor Unit 5Q0959354

€23.95

Free delivery: Sep 15 – 16

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Part no. LR070686

Land Rover Discovery Sport L550 Starter Motor 2.0 Diesel GJ32-11001-AD

€37.95

Free delivery: Sep 15 – 16

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Part no. 7L5907401-1

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

€617.95

Free delivery: Sep 15 – 16

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Part no. MB3T-14301-BD

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

€56.95

Free delivery: Sep 15 – 16

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Part no. 8X0971679K

Audi A1 8X Dash Panel Glove Box Light Wiring Loom Harness Wire 8X0971679K

€32.95

Free delivery: Sep 15 – 16

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Part no. FR3T-14D644-CF

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

€37.95

Free delivery: Sep 15 – 16

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Part no. 6840094

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

€37.95

Free delivery: Sep 15 – 16

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Part no. 9153136

BMW F01 F02 F03 LCI Holder Bracket Control Telematics Unit 9153136

€23.95

Free delivery: Sep 15 – 16

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Part no. 3R0971073

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

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7928587

BMW F44 G20 G30 Audio Amplifier Sound System Unit Module ECU 7928587

€99.95

Free delivery: Sep 15 – 16

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Part no. 4F0035503E

Audi A4 B8 Transmitting Receiving Unit Road Toll System 4F0035503E

€94.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5E3907159F

Skoda Octavia IV Impact Sound Control Module Unit ECU 5E3907159F

€70.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A9078280000

Mercedes W906 W907 Radio Antenna Rod Roof Antenna A9078280000

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4H0035225H

Audi A8 D4 Aerial Antenna Amplifier Diversity 04S 4H0035225H

€23.95

Free delivery: Sep 15 – 16

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Part no. 2201L720P

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

€165.95

Free delivery: Sep 15 – 16

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Part no. YWC500312

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

€23.95

Free delivery: Sep 15 – 16

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Part no. 6R0971537H

Audi A1 8X Negative Battery Terminal Cable Wiring 6R0971537H

€23.95

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Part no. DPLA-14D620-AB

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

€42.95

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Part no. 1H5951253

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

€23.95

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Part no. A2059007615

Module Mercedes W205 Air Conditioning Control Module A2059007615

€28.95

Free delivery: Sep 15 – 16

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Part no. A2514401909

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

€23.95

Free delivery: Sep 15 – 16

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Part no. 3B0K-40104

Ford Ranger Mk6 Additional Fuse Box Relay Box Module Unit TKE4180109A

€66.95

Free delivery: Sep 15 – 16

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Part no. 4H0907355C

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

€51.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1185402504

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

€37.95

Free delivery: Sep 15 – 16

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Part no. 4B0959643E

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

€23.95

Free delivery: Sep 15 – 16

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Part no. FK72-19C299-AB

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

€51.95

Free delivery: Sep 15 – 16

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Part no. 5Q4959393K

Volkswagen Crafter TR Front Door Control Module Unit Driver's Side 5Q4959393K

€23.95

Free delivery: Sep 15 – 16

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Part no. 2467087

Ford Transit Courier Gearbox Earth Ground Wiring Harness Cable JT76-14324-AB

€23.95

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Part no. 1399108080

Citroën Relay III Battery Negative Terminal Cable Wire Grounding 1399108080

€23.95

Free delivery: Sep 15 – 16

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Part no. KK2T-19L540-AD

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

€32.95

Free delivery: Sep 15 – 16

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Part no. AV1T-14026-AAB

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

€23.95

Free delivery: Sep 15 – 16

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Part no. 9153418-1

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

€23.95

Free delivery: Sep 15 – 16

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Part no. 4H22-14A614-EA

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

€23.95

Free delivery: Sep 15 – 16

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Part no. FK72-14632-BCD

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

€75.95

Free delivery: Sep 15 – 16

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Part no. LR072286

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

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. DWM500100

Range Rover Sport L320 Battery Tray Holder Mount Bracket Right O/S DWM500100

€23.95

Free delivery: Sep 15 – 16

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Part no. 7P6035552A

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

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 04C903023K

Volkswagen Golf MK 7 Audi A3 8V 1.4 Alternator Petrol 04C903023K

€28.95

Free delivery: Sep 15 – 16

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: Sep 15 – 16

If paid before 14:00

Part no. 8U0955559

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

€23.95

Free delivery: Sep 15 – 16

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: Sep 15 – 16

If paid before 14:00

Part no. 5QA919294E

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

€42.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7PP905852C

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

€47.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A6394405009

Wiring Loom Mercedes W639 Vito Cable Door Wiring Cable A6394405009

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2048208526

Mercedes W204 Parking Sensor Parktronic Display Control A2048208526

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A2469007314-1

Mercedes CLA C117 Central Display Screen Multimedia Sat Nav Unit A2469007314

€66.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5J0951172

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

€23.95

Free delivery: Sep 15 – 16

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: Sep 15 – 16

If paid before 14:00

Part no. A2129005401

Mercedes W207 Fuse Junction Box Relay Control Unit Module SAM A2129005401

€51.95

Free delivery: Sep 15 – 16

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Part no. A6461509777-2

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

€142.95

Free delivery: Sep 15 – 16

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: Sep 15 – 16

If paid before 14:00

Part no. 9847268

BMW G20 G21 G30 G31 Hybrid Electronic Memory Management Control Module 9847268

€151.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 2622489

BMW G20 G20 LCI G21 G22 LCI Central Bass Speaker Loudspeaker Left N/S 2622489

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Part no. 8R0971035AD

Audi Q5 8R Door Wiring Harness Loom Cable Front Driver's Side 8R0971035AD

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 1K0035507L

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

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. C1B1-12A650-FH-1

Ford Fiesta Mk7 1.0 Ecoboost SFJA 100HP Engine ECU Kit C1B1-12A650-FK Manual

€208.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 8XA035754B

Audi A1 S1 8X Sat Nav MMI 3G+ Head Unit Module 8XA035754B

€569.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 7P6907441G

Volkswagen Touareg 7P Camera Electronic Control Unit Module 7P6907441G

€360.95

Free delivery: Sep 15 – 16

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: Sep 15 – 16

If paid before 14:00

Part no. A0009008718

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

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A0495453128

Steering Lock Cable Mercedes W169 W204 Connector Plug Wiring Loom A0495453128

€23.95

Free delivery: Sep 15 – 16

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: Sep 15 – 16

If paid before 14:00

Part no. A1725403405

Mercedes R172 OM651 Diesel Alternator Wiring Harness Cable Loom A1725403405

€23.95

Free delivery: Sep 15 – 16

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: Sep 15 – 16

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: Sep 15 – 16

If paid before 14:00

Part no. 83A907159

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

€66.95

Free delivery: Sep 15 – 16

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: Sep 15 – 16

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: Sep 15 – 16

If paid before 14:00

Part no. 4H0907412

Audi A8 D4 Ambient Lighting Control Module Unit ECU 4H0907412

€23.95

Free delivery: Sep 15 – 16

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Part no. 1167294

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

€23.95

Free delivery: Sep 15 – 16

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Part no. 7641661-2

BMW F10 F20 F30 Petrol N20 Wiring Harness Motor Sensor System 2 Module

€32.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 4H0907705J

Porsche Cayenne 92A Steering Column Control Module Unit 4H0907705J

€28.95

Free delivery: Sep 15 – 16

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Part no. 8T0907468AA

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

€23.95

Free delivery: Sep 15 – 16

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Part no. 8514577

BMW X3 F25 Diesel N47N Engine Gearbox Wiring Loom Harness 8514577

€23.95

Free delivery: Sep 15 – 16

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Part no. A2129060005-1

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

€23.95

Free delivery: Sep 15 – 16

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Part no. 5F4971194

Seat Leon Cupra 5F Rear Bumper Wiring Loom PDC Harness Parking Sensor 5F4971194

€23.95

Free delivery: Sep 15 – 16

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Part no. R8D2-14A614-CA

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

€42.95

Free delivery: Sep 15 – 16

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: Sep 15 – 16

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Part no. 382327

Ultrasonic Module Mini Countryman Paceman R60 R61 Alarm System Sensor 0382327

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. A1715400406

Mercedes SLK R171 Window Lifter Lift Mechanism Cable Wiring Harness A1715400406

€23.95

Free delivery: Sep 15 – 16

If paid before 14:00

Part no. 5Q0971068F

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

€47.95

Free delivery: Sep 15 – 16

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Part no. 6807332

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

€37.95

Free delivery: Sep 15 – 16

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Part no. 8V0919129B

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

€161.95

Free delivery: Sep 15 – 16

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Part no. A2129004901

Fuse Box Mercedes W212 Rear SAM Relay Control Unit Module A2129004901

€28.95

Free delivery: Sep 15 – 16

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Part no. 7PP907064KG-1

Porsche 718 Boxster 982 Body Comfort Module Control Unit 7PP907064KG

€118.95

Free delivery: Sep 15 – 16

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Part no. 3Q0951253

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

€23.95

Free delivery: Sep 15 – 16

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Part no. 4F0907283

Audi A6 C6 FL Tire Pressure Control Module 4F0907283

€28.95

Free delivery: Sep 15 – 16

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Part no. A4519005400

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

€284.95

Free delivery: Sep 15 – 16

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Part no. 8R0867749A

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

€28.95

Free delivery: Sep 15 – 16

If paid before 14:00

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