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 Q3 F3 A8 4N 2.5 TFSI Petrol Control Fuel Pump Tank Pump Unit 4N0906093E

€51.95

Free delivery: Sep 14 – 15

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Part no. 7E0945095T-2

Volkswagen Transporter T6 Rear Lamp Side Tail Light Wiring Left N/S 7E0945095T

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7H2Q-12A650-AF

Land Rover Discovery 3 L319 Engine ECU Unit 2.7 TDV6 190HP 7H2Q-12A650-AF Manual

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. CF6N-18C815-HG

Range Rover Evoque L538 Multimedia Radio CD Player Sat Nav Head CF6N-18C815-HG

€56.95

Free delivery: Sep 14 – 15

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Part no. 9335243

Head-Up Display Mini Cooper F54 F55 F56 F57 Hud Project Dash Screen 9335243

€189.95

Free delivery: Sep 14 – 15

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Part no. HPLA-14N030-AB

Land Rover Range Rover Mk4 L405 Rear Fuse Box Board 3.0 TDV6 HPLA-14N030-AB

€61.95

Free delivery: Sep 14 – 15

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Part no. A2129060005

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

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2535400601

Mercedes X253 Starter Motor Wiring Harness Cable A2535400601

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. BK2T19G317BD

Ford Transit Custom Mk8 Power Inventer 12V DC To 230V AC BK2T19G317BD

€80.95

Free delivery: Sep 14 – 15

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Part no. A2124401651

Door Cable Mercedes W212 Wiring Loom Front Left N/S Passenger Side A2124401651

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 03G906016LR

Audi A4 B7 Engine Control Unit ECU 140 HP KIT 2.0 Diesel Automatic 03G906016LR

€75.95

Free delivery: Sep 14 – 15

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Part no. 9797818

BMW X1 U11 High-Voltage Accumulator Control Unit 9797818

€203.95

Free delivery: Sep 14 – 15

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Part no. 4G8971035BG

Audi A7 4G Front Door Harness Wiring Loom Cable Driver Side 4G8971035BG

€28.95

Free delivery: Sep 14 – 15

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Part no. 8635811-1

BMW F20 F30 LCI 118i 318i B38 Engine Wiring Loom Harness Cables 8635811

€89.95

Free delivery: Sep 14 – 15

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Part no. 6819653

BMW X5 F15 Fuse Box Front Body Control Module ECU BCM Unit 6819653

€23.95

Free delivery: Sep 14 – 15

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Part no. 982907309C

Porsche 718 Boxster 982 2.0T DDPB 300HP Engine Control ECU 982907309C Automatic

€484.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 06M907309H-1

Audi RS5 F5 2.9 TFSI DECA Quattro 450HP Engine Unit ECU Kit 06M907309H Automatic

€788.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2074401208

Mercedes W207 Parking Sensor Wiring Loom Cable Harness Rear PDC

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8506666-5

Mini One R56 LCI 90HP N47N Diesel Engine ECU Control Unit DDE 8506666 Manual

€89.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2469008115

Mercedes W176 W246 Gearbox Transfer Case Control Module Unit ECU A2469008115

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8U0614109B

Audi RS Q3 8U ABS Pump Modulator Control Unit 2.5 TFSI Petrol 8U0614109B

€379.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. MB3T-14B060-ABE-1

VW Volkswagen Amarok NF Engine Wiring Loom Harness Cable MB3T-14B060-ABE

€94.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 2518800

Ford Kuga C482 Front Collision Detection Windscreen Camera Unit LV4T-19406-CF

€85.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9178791

BMW F01 F02 F10 F11 Cable Wiring Set ARS Valve Block 9178791

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4E0971845

Audi A8 D3 Rear Fuse Relay Box Plate Mounting Right O/S 4E0971845

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5A3AF30

BMW F40 F44 DAB Audio Receiver Module Harman Becker 5A3AF30

€108.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6803169

Air Con Module BMW F20 F30 F31 Mini F55 F56 Air Conditioning A/C Unit 6803169

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9145172

BMW E90 E91 E92 E93 LCI Battery Bracket Lower Section Box 9145172

€23.95

Free delivery: Sep 14 – 15

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Part no. 9396828

Antenna Module BMW F06 F12 F13 E63 Rear Multi-band Antenna GPS TEL Right 9396828

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8576333-3

BMW F20 F30 F32 120dX 320dX 420dX Diesel N47N 184HP ECU Kit DDE 8576333 Key FEM

€275.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8X0971687D

Audi A1 8X Rear Door Harness Left Right N/O/S Wiring Loom Cable 8X0971687C

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 3Q0905861C

Audi A4 B9 A5 F5 Steering Column Lock Mechanism Control Unit 3Q0905861C

€23.95

Free delivery: Sep 14 – 15

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Part no. 8W8947356

Audi A5 F5 Front Door Card Panel LED Module Light Unit Wiring Harness 8W8947356

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2059006330

Mercedes W205 SAM Module Front Body Comfort Control Unit ECU A2059006330

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A9079001403

Mercedes Sprinter W907 Module Control Unit Radar Sensor A9079001403

€123.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9459673-1

Seat Module BMW X4 F26 F20 F30 Front Driver Side Control Unit ECU 9250421

€94.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8578945-2

BMW F20 F21 F30 F31 116d 316d N47N 116HP ECU Kit DDE 8578945 Key FEM Lock Manual

€341.95

Free delivery: Sep 14 – 15

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Part no. 7P0971235

Porsche Cayenne 92A High Voltage Wiring Harness Battery Cable 7P0971235

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7CC971120AK

Volkswagen Crafter Mk2 SY Front Door Wiring Loom Harness Left N/S 7CC971120AK

€66.95

Free delivery: Sep 14 – 15

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Part no. A1121510001

Mercedes W203 W211 W220 W221 Starter Motor M113 Petrol Engine A1121510001

€23.95

Free delivery: Sep 14 – 15

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Part no. A1699000200

Mercedes-Benz A B W169 W245 Front Right Door Control Unit Module A1699000200

€23.95

Free delivery: Sep 14 – 15

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Part no. 7P5919475H

Porsche Cayenne 92A PDC Parking Sensor Control Module Unit 7P5919475H

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4G8971036D

Audi A7 4G Front Door Harness Wiring Loom Cable Passenger Side 4G8971036D

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8584817

BMW G20 G21 G01 G02 Wiring Harness Engine Glow Plug Module 8584817

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9323417

BMW X5 F15 Door Wiring Harness Light Package Adapter Cable 9323417

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7N0971691AB

Volkswagen Sharan 7N Door Wiring Cable Rear Left N/S 7N0971691AB

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7541335-8

BMW X3 E83 M54 2.5i 192HP Engine Control Unit ECU DME 7541335 Manual

€237.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9807756

Mini Cooper R60 Wiring Passenger Loom Front Door Cables Left N/S 9807756

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. BM5T-15K866-AN

Ford C-Max Mk2 PDC Parking Sensor Control Unit Module BM5T-15K866-AN

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 2Q0971537AG

Volkswagen Polo GTI AW1 Battery Cable Grounding Line Wiring Harness 2Q0971537AG

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6956748

BMW E87 E90 E91 LCI PDC Ultrasonic Parking Sensor Tiefgruen Green A43 6956748

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A6519000603-3

Mercedes W205 C205 OM651.921 170HP Engine Control ECU Kit A6519000603 Manual

€332.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. LR014265

Land Rover Discovery 4 L319 Fuse Box Fusebox Fuse Panel Cover LR014265

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6942551

BMW E87 E90 E91 Front Left N/S Seat Lordosis Pad Adapter Lead Wiring

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9232164

BMW X3 F25 Gateway Control Module Unit ECU 9232164

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8485064

BMW G20 LCI Starter Motor Positive Battery Cable B48B20A Petrol 8485064G20

€23.95

Free delivery: Sep 14 – 15

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Part no. A2044402701

Mercedes W204 Dynamic Suspension Damper Shock Absorber Module ECU A2044402701

€28.95

Free delivery: Sep 14 – 15

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Part no. 4M1959593D

Audi A6 C8 Door Control Module Unit ECU Front Driver's Side 4M1959593D

€32.95

Free delivery: Sep 14 – 15

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Part no. 7456364

BMW F33 F83 M4 Convertible Folding Top Roof ECU Module Control Unit CTM 7456364

€66.95

Free delivery: Sep 14 – 15

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Part no. 8K0971679B

Audi A4 B8 Glove Box Passenger Air Module Switch Wiring Harness Cable 8K0971679B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. GOLF-5K-SCREEN-2

VW Golf Mk5 Mk6 Passat B6 B7 Car Radio Display MMI Multimedia Touch Screen 7"

€237.95

Free delivery: Sep 11 – 15

If paid before 14:00

Part no. A0035421019-1

Mercedes C117 GLA X156 ML W166 W176 W246 Relay 5 Pins Yellow Set A0035421019

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. JPLA-13E758-AA

Range Rover Sport L494 Door Harness Wire Front Left Right N/O/S JPLA-13E758-AA

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6938226

BMW 3 Series E90 E91 Cable Wiring Loom Rear Door Left Right 61126938226 6938249

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9428830

Mini F60 Lci Wiring Harness Control Unit Automatic Transmission GA6F21AW 9428830

€94.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0005463704

Mercedes C118 Positive Pole Battery Insulating Cap Cover Trim A0005463704

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. GK3T-9K499-FBC

Ford Transit Mk8 Engine Bay Fuse Box Wiring Loom Harness 2.0 GK3T-9K499-FBC

€123.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9315130

Door Wiring Harness BMW F25 Rear Left Right Door N/O/S Wiring Loom 9315130

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2075402013

Door Cable Mercedes W212 Wiring Loom Front Left Right Door N/O/S A2075402013

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 2K5972176E

Volkswagen Caddy Maxi 2K Tailgate Lock Wiring Loom Cable 2K5972176E

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7PP907530Q

Porsche Cayenne 92A Gateway Control Module Unit 7PP907530Q

€89.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2044402232

Mercedes W204 W207 Battery Cable Positive Wiring Harness Loom A2044402232

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9383683

Body Domain Controller Mini F54 F55 F56 F60 ECU BDC Control Unit Module 9383683

€104.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8571042

BMW X5 F15 Engine Wiring Harness Loom Wire Connector Cable 8571042

€332.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7948144

BMW F40 F44 Seat Occupancy Mat Control Unit Sensor 7948144

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F0959655B

Audi A6 C6 Air Module Control Unit ECU Module 4F0959655B

€23.95

Free delivery: Sep 14 – 15

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Part no. 9143439

BMW E81 E87 E90 E91 E92 6-disc CD Changer without Magazine 9143439

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7P6971121H

VW Volkswagen Touareg 7P Door Wiring Loom Harness Front Left N/S 7P6971121C

€28.95

Free delivery: Sep 14 – 15

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Part no. 8T0035223L

Audi A4 B8 A5 8T Audio Amplifier Sound Booster Control Unit Module 8T0035223L

€185.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9261614

BMW 1 2 Series F20 F21 F22 Rear Bumper PDC Ultrasonic Sensor Glacier Silver

€23.95

Free delivery: Sep 14 – 15

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Part no. 6839355

BMW F44 Gran Coupe Antenna Amplifier Suppresion Filter 6839355

€23.95

Free delivery: Sep 14 – 15

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Part no. 9184810

BMW X6 E71 Wiring Set Wash Water Container Cable Loom 9184810

€23.95

Free delivery: Sep 14 – 15

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Part no. CV2T-10C679-BD

Ford Fiesta Mk7 7.5 Negative Battery Wiring Cable Harness Loom CV2T-10C679-BD

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9362351

Head Unit Mini F55 F56 BMW F45 i3 I01 Radio DAB Media Player Unit 9362351

€94.95

Free delivery: Sep 14 – 15

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Part no. 094290

BMW E87 E90 Media Player Infotainment Multimedia System Navigation Screen 094290

€332.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. GR3T-14B321-DF

Ford Mustang GT Mk6 Air Module Control Unit GR3T-14B321-DF

€113.95

Free delivery: Sep 14 – 15

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Part no. 4E0907440

Audi A8 D3 Vehicle Location Tracking Control Module Unit 4E0907440

€23.95

Free delivery: Sep 14 – 15

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Part no. 6899320

BMW F40 F44 Steering Column Lock Control Module 6899320

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 2002160

Ford Focus Mk3 III Negative Minus Ground Battery Terminal Cable F1FT-14324-DAC

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7075944-3

BMW E60 E65 E70 Front Right Seat O/S Height Adjustment Drive 7075944

€23.95

Free delivery: Sep 14 – 15

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Part no. 04C903023M

Audi A3 8V A1 S1 8X VW Jetta A6 Golf 5G Golf R 5G Petrol Alternator 04C903023M

€70.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8574372-2

BMW F30 F32 330d 430d N57N Engine Control Unit ECU Kit DDE 8574372 Automatic

€161.95

Free delivery: Sep 14 – 15

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Part no. 8V3971035A

Audi A3 S3 8V 3D Door Wiring Harness Loom Cable Driver's Side 8V3971035A

€23.95

Free delivery: Sep 14 – 15

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Part no. A2135409716

Mercedes W205 W213 OM654 Alternator Starter Wiring Harness Loom A2135409716

€113.95

Free delivery: Sep 14 – 15

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Part no. 8X0959792K

Audi Q3 8U Front Door Module Control Unit ECU Passenger Side 8X0959792H

€23.95

Free delivery: Sep 14 – 15

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Part no. 5A088E6-1

BMW F40 M135i xD B48 306HP Engine Control Unit ECU Kit DME 5A088E6 BDC Key

€731.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9176823

BMW X5 E70 Footwell Light Control Module Unit LEAR PL4 FRM II 9176823

€170.95

Free delivery: Sep 14 – 15

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Part no. A2218201259-2

Mercedes W221 Bi-Xenon Headlight Front Right O/S Cable Wire Socket A2218201259

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. EH22-01444-BB

Land Rover Discovery 4 L319 Battery Pad Cover Panel EH22-01444-BB

€32.95

Free delivery: Sep 11 – 15

If paid before 14:00

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