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 8J Door Wiring Harness Cable Passenger Side 8J0971030J

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1698702710

Mercedes-Benz A B Class W169 W245 Tow Protection ECO Switch Button Unit Module

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W6945092AA-1

Audi A5 F5 Tail Light Lamp Side Martix Cable Wire Rear Left N/S 8W6945092AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. KPLA-10C820-DB

Land Range Rover Sport L494 Hybrid Battery Hose Line Pipe Tube KPLA-10C820-DB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2601501600

Mercedes W177 Engine Wiring Loom Harness Cables M260 Petrol A2601501600

€189.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2479003216

Mercedes C118 W247 Head Unit Radio Sat Nav Navigation Control Unit A2479003216

€474.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2055404306

Mercedes W205 Shock Absorber Adjustment Wire Harness Rear Right O/S A2055404306

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6941445

BMW E63 E64 Bluetooth Cable Hands Free Telephone Microphone Unit 6941445

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0971073

Audi A6 C6 Front Slam Panel Wiring Loom Harness Cable 4F0971073

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9G9T-14B533-JC

Ford Galaxy Mondeo Mk4 Front Door Control Module Passenger's Side 9G9T-14B533-JC

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7640132-4

BMW F20 F30 Mini F56 Alternator Generator 150A Denso 7640131

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T8035464

Audi A5 8T Radio Amplifier Mounting Bracket Holder Support Plate 8T8035464

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 03C906016G

Audi A3 8P 1.4 TFSI CAXC 125HP Engine Control Unit ECU 03C906016G Automatic

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9166542

BMW E92 HDD Navigation Reader System Module Unit ZB CE3 Navi JAPAN 9166542

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9140179

BMW F10 Radio Antenna Amplifier Suppression Filter 9140179

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8H0035464B

Audi A4 B7 Engine Control Unit ECU Module Bracket Holder Retainer 8H0035464B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BJ32-15K866-CE

Land Rover Range Rover Evoque L538 PDC Parking Sensor Module BJ32-15K866-CE

€75.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4F0035720B

VW Volkswagen Golf R Mk7 Road Toll Sender Receiver Cover Lid Top 4F0035720B

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7H0937087F

Volkswagen Transporter T5 Body Control Module BCM SME RBG 7H0937087F

€379.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6948692

BMW E60 E61 E63 Passenger Side Door Airbag Control Module 6948692

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8631668

BMW F20 F21 F30 LCI M140i 340i Wiring Harness Injection Valve Ignition 8631668

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. XS7U-11000-C4A

Ford Focus Mondeo Escort 1.8 Petrol Engine Motor Starter XS7U11000C4A

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9178791

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

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6864923

Air Module BMW F01 F02 LCI F07 GT F10 F11 F13 ECU Control Unit 6864923

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9116445

BMW Z4 E85 E86 Basic Body Control Unit Module GM5 Star12 LOW 9116445

€170.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8X0971693

Audi A1 8X Door Wiring Harness Loom Rear Left Right N/O/S Cabling 8X0971693

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9227217

BMW F12 Aerial Amplifier AMP Antenna Supression Filter Module 9227217

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. BK2T-19L540-BE

Ford Transit Custom Mk8 Door Wiring Loom Harness Right O/S BK2T-19L540-BE

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8U0907468BA

Audi Q3 8U Gateway Control Module Unit ECU 8U0907468AQ

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7M0951253C-3

VW Volkswagen Audi Seat Skoda Relay Black Control 5 Pin 12V 7M0951253C Set X2

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7E0971793

Volkswagen Transporter T5 T6 Battery Wire Negative Lead Cable 7E0971793

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6C1T-14A120-AD

Ford Transit Mk7 Starter Motor Wiring Cable 2.2 TDCi 6C1T-14A120-AD

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9267467

BMW F13 Body Control Module Electronic Junction Box JBBFE 3 PL6 V3 9267467

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2124405833

Door Wiring Mercedes W212 Loom Cable Rear Left Right N/O/S A2124405833

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. AH22-18D493-AC

Land Rover Discovery 4 L319 Heater Control Module ECU Unit AH2218D493AC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7L0937559

Porsche Cayenne 955 9PA Audi Q7 4L VW Touareg 7L Fuse Box Relay Module 7L0937559

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1648202715

Electrical Wiring Cable Mercedes W164 W251 Radio Media Interface A1648202715

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9280912

F10 F11 F20 F21 F30 F31 Front Seat Control Module Unit 9280912

€66.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3WA959595A

Audi A3 RS3 8V Door Control Unit ECU Module Front Driver's Side 3WA959595A

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4G0937517B

Audi A7 4G Power Distribution Box Control Unit 4G0937517B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8648840

BMW F45 F48 F49 Mini Cooper F60 Earth Ground Cable 8648840

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5N0971693AD

Volkswagen Tiguan Mk1 Rear Door Wiring Loom Harness Left N/S 5N0971693AD

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 4H22-14A614-HA

Range Rover Sport L320 Air Temperature Sensor Wire Harness Cable 4H22-14A614-HA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5N0971349AP

VW Sharan 7N Positive Plus + Battery Alternator Wiring Harness Cable 5N0971349AP

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 1Z0959772B

VW Eos 1F Golf 1K Jetta 1K Passat 3C Heated Seat Control Unit Module 1Z0959772B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A6401502579

Mercedes W169 200CDI OM640.941 140HP Engine Control Unit Module ECU A6401502579

€170.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0971228BH

Audi A4 B9 A5 F5 Starter Motor Battery Cable Wiring Harness 8W0971228BH

€203.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2059008204

Mercedes W205 SAM Module Fuse Box Relay Control Unit A2059008204

€89.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0915459J

Audi A5 F5 S5 RS5 A4 B9 Battery Central Protection Cover Mount 8W0915459J

€80.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2S6H-18C426-DA

Ford Fiesta St Mk5 Heater Control Temperature Harness Wire Cable 2S6H-18C426-DA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7PP907279T

Porsche Cayenne Turbo 92a Comfort Convenience Body Control Unit ECU 7PP907279T

€370.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 0-1432785-1

TycoElectronics 12 V DC Fuse Relay Set 0-1432785-1

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 912034H670

Hyundai H-1 Fuse Box Front Relay Engine Control Unit Module ECU 91203-4H670

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9297604

BMW F12 Wire Harness Cable Loom Wiring 9297604 9313752

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2059060204-2

Mercedes W205 Front Headlight Wiring Harness Cable Plug Right O/S A2059060204

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9337881

BMW 1 3 4 F20 F21 F30 F31 F32 Power Distribution Fuse Box Rear 9337881

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2038202185

Mercedes W203 Door Control Module Rear Left N/S A2038202185

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8796289

BMW X3 G01 X4 G02 X5 G05 Battery Terminal Negative Cable Wire Wiring 8796289

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0019820823

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

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7827899

BMW G20 G21 G60 G61 X2 U10 X1 U11 Charging Charge Cable Hybrid Plug In 7827899

€142.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T8907461

Audi A5 8T Body Control Module BCM Controller Bracket Holder 8T8907461

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0009068106

Alternator Generator Mercedes W177 W247 M260 Petrol Engine 150A A0009068106

€237.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. GX73-18808-DC

Land Range Rover Evoque L551 Front Door Speaker Left Right N/O/S GX73-18808-DC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 5Q0919294F

Seat Leon Mk3 VW Golf 7 PDC Parking Distance Control Module Unit ECU 5Q0919294F

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8Y0035465A

Audi Q2 GA Harman Speaker Amplifier Booster Sound System 8Y0035465A

€132.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 2755516

Battery Mounting Bracket Mini Cooper R55 R56 R57 R60 R61 Clamp Bolt Holder

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A0009068706

Mercedes W205 C43 Alternator Generator VALEO 200A 3.0 Petrol A0009068706

€113.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 80A941823A

Audi Q5 FY Positive Battery Terminal Potential Distributor 80A941823A

€56.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T0971035G

Audi A5 8T Coupe Front Door Wiring Loom Harness Driver's Side Cable 8T0971035G

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. CPLA-2C496-AD

Land Rover Range Rover L405 Parking Assist PDC Module Control Unit CPLA-2C496-AD

€61.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. JK2T-14C676-AA

Ford Ranger Mk3 Door Air Module Impact Sensor Unit Driver's Side JK2T-14C676-AA

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W0959595H

Audi A5 F5 Rear Door Control Module Unit ECU Left Right N/O/S 8W0959595H

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 9231399

Camera Module BMW F01 F07 F10 F11 F12 Based Assist Systems Control Unit 9231399

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6952987

BMW 5 6 Series E60 E61 E63 Driver Side Door Airbag Control Unit Module 6952987

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0971688AC

Audi A4 B8 Door Wiring Harness Cable Loom Rear Right O/S 8K0971688AC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A1679003811

Door Module Mercedes W205 W213 C253 Front Left N/S Control Unit ECU A1679003811

€37.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. XH42-10E921-AC

Land Rover Range Rover L322 Aerial Antenna Amplifier Module Ecu XH42-10E921-AC

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8J0971085B

Audi TT 8J Rear Bumper Fog Light Wiring Loom Harness Cabling 8J0971085B

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 06E971627M

Fuel Injector Wiring Audi S4 B8 A6 A7 C7 4G 3.0 V6 TFSI Wiring Cable 06E971627M

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6960803

BMW E65 E66 E67 Control Unit Voice Input System Module 6960803

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W6945091AA-2

Audi A5 F5 Rear Tail Light Matrix LED Outer Left N/S Wire Harness 8W6945091AA

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8R0907401J

Audi A5 8T Q5 8R 3.0 TDI CCWA 240HP Quattro Engine ECU 8R0907401J Automatic

€142.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2439000800

Drivetrain Module Mercedes H243 Transmission Control Unit ECU A2439000800

€161.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. N9D3-14D617-AA

Range Rover Velar L560 Passenger Door Control Unit Module ECU N9D3-14D617-AA

€42.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. LR140109

Range Rover Evoque L551 Starter Motor 2.0 Diesel Hybrid MHEV M8D2-11001-AC

€194.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2098200326

Mercedes C209 Body Control Module Unit Temic 376 800 GZ A2098200326

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6946106

BMW 7 E65 E66 Passenger Seat Airbag Sensor Control Unit Module 6946106 6970899

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. DT1T-14B321-AG

Ford Transit Connect Mk2 Air Module Control Module ECU 1.5 TDCi DT1T-14B321-AG

€32.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 6839355

BMW F44 Gran Coupe Antenna Amplifier Suppresion Filter 6839355

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 3AA971694CB

Volkswagen Passat B7 Door Wiring Loom Harness Rear Right O/S 3AA971694CB

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7N0907530BE-1

Volkswagen Caddy 2k Tiguan 5N Gateway Control Module ECU Diagnosis 7N0907530BE

€47.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 7838929

BMW 3 5 6 Series E60 E63 E90 E92 Crossover Frequency Unit Module Door 7838929

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 83A947356T

Audi Q3 RSQ3 F3 Door Lighting LED Module Harness Wire Front Left N/S 83A947356T

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2049006007

Mercedes W204 Multimedia Audio CD Player Radio Head Unit A2049006007

€165.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8581751

BMW F40 MINI F56 F57 F60 Engine Control Unit ECU Box Top Cover Shield 8581751

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8K0971765E

Audi A4 B8 AdBlue Tank Wiring Harness Loom Cable 8K0971765E

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8W5035021

Audi A4 B9 Multimedia MMI Radio SD Player Stereo Sat Nav Head Unit 8W5035021

€659.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. A2229001414

Module Mercedes C205 Front Door Left N/S Control Module Unit A2229001414

€28.95

Free delivery: Aug 5 – 10

If paid before 14:00

Part no. 8T0035785A

Audi A5 8T MMI Multimedia Interface Unit Module Control ECU 8T0035785A

€23.95

Free delivery: Aug 5 – 10

If paid before 14:00

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