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 A8 D4 4H Front Door Control Module Unit ECU Driver's Side 4H0959793R

€23.95

Free delivery: Sep 11 – 14

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Part no. 9356183

BMW 1 2 Series F20 F21 F22 Control Unit Sensor Air Conditioning System 9356183

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 7811700-12

BMW E60 E61 LCI E90 320d 520d N47 177HP ECU KIT DDE 7811700 CAS3 + Key Manual

€161.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. M9R3-19H440-BD

Range Rover Velar L560 Keyless Entry Control Module ECU M9R3-19H440-BD

€70.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2059001527

Mercedes C205 Gearbox Control Module Unit ECU A2059001527

€56.95

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If paid before 14:00

Part no. A2055409750

Door Harness Mercedes W205 Rear Left N/S Door Wiring Loom A2055409750

€32.95

Free delivery: Sep 11 – 14

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Part no. 5Q0971277

Volkswagen Golf Mk7 5G Cooling System Coupling Adapter Wiring Harness 5Q0971277

€37.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 6G9T-14240-GBK

Ford Mondeo Mk4 Rear Door Wiring Harness Wire Loom Left N/S 6G9T-14240-GBK

€23.95

Free delivery: Sep 11 – 14

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Part no. 6927312-1

Seat Module BMW E60 E61 E65 E66 Front Seat Control Unit Module ECU 6927312

€28.95

Free delivery: Sep 11 – 14

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Part no. A2055403606

Mercedes W205 Front Axle Damper Adjustment Right O/S Wiring Harness A2055403606

€28.95

Free delivery: Sep 11 – 14

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Part no. 7P5945096T-2

Porsche Cayenne 92A Rear Outer Tail Light Lamp Wiring Cable Right O/S 7P5945096T

€23.95

Free delivery: Sep 11 – 14

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Part no. A2038204764-1

Mercedes CL203 Rear Tail Light Lamp Wiring Cable Loom Left N/S A2038204764

€23.95

Free delivery: Sep 10 – 14

If paid before 14:00

Part no. 4H0971569E

Audi A8 D4 Heater Blower A/C Air Conditioning Wiring Harness Cable 4H0971569E

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Part no. AH42-14C366-AE

Range Rover L322 Transfer Box Case Control Module Unit ECU AH42-14C366-AE

€61.95

Free delivery: Sep 11 – 14

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Part no. 2G0907159A

Volkswagen VW Polo Mk6 Impact Sound Control Unit Module ECU 2G0907159A

€32.95

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Part no. 8K2T-14B006-AC

Ford Transit Connect Mk2 Air Module Crash Impact Sensor 8K2T-14B006-AC

€23.95

Free delivery: Sep 11 – 14

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Part no. 6M2T-18985-EW

Ford Mondeo Mk4 Front Rear Side Speaker Tweeter Panel Trim 6M2T-18985-EW

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8P4971693M

Audi A3 8P Door Wiring Harness Loom Cable Rear Left Right N/O/S 8P4971693M

€23.95

Free delivery: Sep 11 – 14

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Part no. 2354693

BMW E39 E46 E60 E65 X3 E83 M54 Petrol Starter Motor 7515392

€23.95

Free delivery: Sep 11 – 14

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Part no. A2035450301

Mercedes-Benz C CLK Class W203 W209 Battery Terminal Fuse Box A2035450301

€23.95

Free delivery: Sep 11 – 14

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Part no. 8485066

BMW X3 G01 X4 G02 Positive Cable Alternator Starter Base B Wire Line 8485066

€28.95

Free delivery: Sep 11 – 14

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Part no. CK52-14N144-CE

Range Rover L405 Battery Positive Plus + Fuse Cable Loom CK52-14N144-CE

€23.95

Free delivery: Sep 11 – 14

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Part no. 4K0915429

Audi A6 C8 Battery Positive Terminal Cover Trim Panel 4K0915429

€23.95

Free delivery: Sep 11 – 14

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Part no. 3C0937049D

Volkswagen Golf Mk5 Skoda Octavia Mk2 BCM Body Control Module ECU 3C0937049D

€23.95

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Part no. 7304589

BMW F01 F02 Headlight Module LEAR TMS Headlamp Control Unit Module 7304589

€66.95

Free delivery: Sep 11 – 14

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Part no. 06L971627AD

Volkswagen Golf MK7 GTI Fuel Injectors Wiring Harness 2.0 TFSI 06L971627AD

€51.95

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Part no. 4G8971035AJ

Audi A7 4G8 Front Door Harness Wiring Loom Cable Driver's Side 4G8971035AJ

€47.95

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Part no. 7823345

BMW X5 F15 F20 F21 F22 F30 F31 Alternator Generator 14V N47N Diesel 7823345

€66.95

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Part no. 6920292

BMW 7 Series E65 Cable Harness Loom Front Door Wiring Left Right N/O/S 6920292

€23.95

Free delivery: Sep 11 – 14

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Part no. BK3T-14401-ELC

Ford Transit Mk8 Fuse Box Power Distribution Junction Relay BK3T-14401-ELC

€42.95

Free delivery: Sep 11 – 14

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Part no. A2059004521

Door Module Mercedes W205 GLC C253 Rear Left N/S Control Unit ECU A2059004521

€28.95

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Part no. DS7T-14B321-CE

Ford Mondeo Mk5 Air Module Unit Control ECU Sensor DS7T-14B321-CE

€23.95

Free delivery: Sep 11 – 14

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Part no. A0024463140-4

Mercedes W169 A160 CDI 95HP M266.920 Engine ECU Kit A0024463140 Automatic

€222.95

Free delivery: Sep 11 – 14

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Part no. M8A2-14516-DB

Range Rover Velar L560 Positive Battery Cable M8A2-14516-DB

€51.95

Free delivery: Sep 11 – 14

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Part no. 7640132-2

Alternator BMW F20 LCI F30 Mini F56 F60 Alternator Generator DENSO 180A 7640132

€37.95

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Part no. 6993311

Seat Module BMW F20 F32 F33 Control Unit Front Left Right N/O/S 6993311

€80.95

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Part no. 7E0971691

Volkswagen Transporter T5 Sliding Door Wiring Loom Cable 7E0971691

€23.95

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Part no. ET71-12A650-FF

Ford Transit Courier Engine Control Unit ECU 1.5 TDCi ET71-12A650-FF Manual

€189.95

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Part no. A2115453632

Mercedes S211 W211 C219 Body Control Module ECU Passenger Side A2115453632

€23.95

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Part no. 8473189-1

BMW X5 F15 30dX N57N 258HP Engine Control Unit ECU Kit 8473189 Automatic

€436.95

Free delivery: Sep 11 – 14

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Part no. A2055403706

Mercedes W205 Front Axle Damper Adjustment Left N/S Wiring Harness A2055403706

€28.95

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Part no. 8088723

Engine Wiring BMW X3M F97 X4M F98 Petrol S58 Module Sensors 1 Harness 8088723

€203.95

Free delivery: Sep 11 – 14

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Part no. 6F0919605A

Seat Ibiza Mk5 FR Touch Screen Multimedia Display Radio Head Unit 6F0919605A

€85.95

Free delivery: Sep 11 – 14

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Part no. 8510841-1

BMW X5 E70 LCI 40dX N57S 306HP Engine Control Unit ECU KIT DDE 8510841 Automatic

€560.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8E5945094A-1

Audi A4 B7 Tail Light Side Panel Lamp Cable Wiring Rear Right O/S 8E5945094A

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 9226881

BMW 1 Series F20 F20N F21 F21N LCI Radio Aerial Antenna Amplifier AM/FM 9226881

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8D0951253A

Audi A6 C6 Multi Use Relay Unit Module 4 Pins 373 8D0951253A

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8512291-2

BMW 3 Series E90 E91 LCI N47N 320d 184HP ECU KIT DDE CAS 3 Key 8512291 Manual

€113.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A1775402811

Mercedes W177 W243 W247 Rear Door Wiring Harness Cable Left N/S A1775402811

€32.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8570238-2

BMW E87 E90 F20 F30 Engine Starter Motor Actuator Bosch N47 N47N 8570383

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8U0971030AJ

Audi Rs Q3 8U Front Door Wiring Loom Cable Passenger Side 8U0971030AJ

€32.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 02T911023S

Starter Motor Seat Ibiza 6J VW Volkswagen Polo 6R 1.2 Petrol Engine 02T911023S

€23.95

Free delivery: Sep 11 – 14

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Part no. 03P903023B

Seat Ibiza 6J Mk4 CFWA Diesel Engine Alternator Generator 14V 140A 03P903023B

€42.95

Free delivery: Sep 11 – 14

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Part no. 2541994

Ford Kuga C482 Battery Negative Cable 2.5 FHEV Petrol Hybrid LX6T-14301-EAAH

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8P4971693P

Audi A3 8P Door Wiring Harness Loom Rear Left Right N/O/S Cabling 8P4971693P

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8R0907468AE

Audi A5 8T 2.0 TDI Gateway Control Module Unit ECU 8R0907468AE

€66.95

Free delivery: Sep 11 – 14

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Part no. 8385159-1

BMW X3 E83 E46 Battery Cable Holder Mounting B Base Trim Carrier 8385159

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8T0959792P

Audi A5 8T Front Door Control Module Right O/S Passenger Side 8T0959792Q

€23.95

Free delivery: Sep 11 – 14

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Part no. BH22-14633-CA

Land Rover Discovery 4 L319 Door Wire Wiring Harness Rear Left N/S BH22-14633-CA

€42.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. BJ32-14B526-AF

Land Rover Freelander 2 Body Control Module BCM Unit L359 BJ32-14B526-AF

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. GX53-18K812-CJ

Land Rover Discovery Sport L550 Radio CD Player Multimedia Unit GX53-18K812-CJ

€56.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 4G8971029DQ

Audi A7 4G8 Front Door Harness Wiring Loom Cable Driver's Side 4G8971029DQ

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5Q0971230FP

Battery Cable Audi A3 8V Starter Alternator Wiring Harness 5Q0971230FP

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 7152588

Mini Cooper One R50 R53 JCW Fuel Filler Cover Flap Actuator 7152588 7127872

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 7N0959794F

Volkswagen Sharan 7N Rear Door Control Module Left Right N/O/S ECU 7N0959794F

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 3V0971694AA

Skoda Superb 3V Door Wire Cable Harness Loom Rear Right O/S 3V0971694AA

€32.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 7N0959792E

Volkswagen Sharan 7N Front Door Control Module Unit Passenger Side 7N0959792E

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5QF971345

Audi RSQ3 F3 Positive Plus + Battery Wiring Harness Cable Power 5QF971345

€28.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2139002722

Door Module Mercedes W205 W213 X253 Rear Left Door Control Unit A2139002722

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5A0FAE3

BMW G26 Earth Ground Cable Negative Battery Lead Wiring 5A0FAE3

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2465409934

Mercedes W176 W246 Rear Door Wiring Loom Harness Left Right N/O/S A2465409934

€51.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5G0971104AD

VW Volkswagen Golf Mk7 Wiring Loom PDC Rear Harness Parking Sensor 5G0971104AD

€28.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 7605061-1

BMW F10 F30 Alternator Generator Electrical Unit 210A N20 Petrol 7605061

€42.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 3R0971693A

Seat Exeo 3R Rear Door Wiring Harness Cable Loom Left Right N/O/S 3R0971693A

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. BV6T-14E073-AAB

Ford Kuga Mk2 Front Door Wiring Harness Cable Loom Left N/S BV6T-14E073-AAB

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8T8035570-1

Audi A4 B8 Radio Antenna Noise Signal Disturbance Suppressor 8T8035570

€23.95

Free delivery: Sep 11 – 14

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Part no. 8T0959795C

Audi A5 8T Rear Door Control Module Unit Left Right N/O/S 8T0959795C

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. H1B1-12A650-FA

Ford Fiesta Mk8 Engine Control Module ECU Unit 1.0 Petrol 2714615 100HP SFJE

€37.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A1718705494

Mercedes R171 Radio Player CD COMAND Head Unit Controller A1718705494

€332.95

Free delivery: Sep 11 – 14

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Part no. A0025428719

Mercedes W176 W204 W207 W166 Relay 4 Pin Grey Hella A0025428719

€23.95

Free delivery: Sep 11 – 14

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Part no. 8C1T-14A073-BE

Ford Transit Mk7 Body Control Module BCM 2.2 TDCi 8C1T-14A073-BE

€123.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. F1ET-14K138-CDE

Ford Focus Mk3 Front Wiring Cable Harness Door Passenger Side F1ET-14K138-CDE

€28.95

Free delivery: Sep 11 – 14

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Part no. 420971036

Audi R8 42 Front Door Wiring Harness Cable Loom Right O/S 420971036

€85.95

Free delivery: Sep 11 – 14

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Part no. 8506444-1

BMW E90 E91 LCI E92 330d Diesel N57 245HP ECU Engine Kit DDE 8506444 CAS3 + Key

€332.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. AH42-19C032-AE

Land Rover Discovery 4 L319 Radio Receiver DAB Module AH42-19C032-AE

€80.95

Free delivery: Sep 11 – 14

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Part no. 4L1937503

Audi Q7 4L Fuse Relay Box Module Electrical Control Unit 4L1937503

€23.95

Free delivery: Sep 11 – 14

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Part no. AH42-19G255-AA

Land Rover Range Rover L322 Aerial Antenna Amplifier Module AH42-19G255-AA

€23.95

Free delivery: Sep 11 – 14

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Part no. A2045408735

Mercedes W204 Front Seat Air Module Wiring Cable Front Right A2045408735

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 4K5971693BA

Audi A6 C8 Door Wiring Harness Cable Loom Rear Left Right N/O/S 4K5971693BA

€37.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 4G8971036K

Audi A7 4G8 Front Door Harness Wiring Loom Cable Passenger Side 4G8971036K

€47.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 3457416

Mini Cooper R58 Fuse Distribution Box Control Unit High PL3 SPEG H8 3457416

€165.95

Free delivery: Sep 11 – 14

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Part no. A4155404305

Microphone Cable Mercedes Citan W415 Wiring Loom Cable Harness 27083202

€56.95

Free delivery: Sep 11 – 14

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Part no. 4G2907311C-1

Audi A7 4G8 3.0 TDI CRTE 218HP Quattro Engine ECU Kit 4G2907311C BCM2 + 2 Keys

€664.95

Free delivery: Sep 11 – 14

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Part no. 83F971104F

Audi Q3 F3 Rear Bumper PDC Wiring Loom Cabling Parking Sensor 83F971104F

€56.95

Free delivery: Sep 11 – 14

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Part no. 2383676

Battery Cable BMW F22 Negative Earth Cable Minus Electrical Wire 7625999

€23.95

Free delivery: Sep 11 – 14

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Part no. 9873244

Mini F57 F60 Air Module Control Unit Sensor ECU 9873244

€237.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. H1BT-19949-AD

Ford Fiesta ST MK8 Heater Flap Control Wiring Cable WIre Loom H1BT-19949-AD

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. C1BT-14D559-AAC

Ford Fiesta Mk7 Boot Lid Tailgate Keyless Entry Wiring Loom C1BT-14D559-AAC

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 9380203

BMW G30 G31 G32 G11 G12 Cable Wiring Harness Holder Guide Mount 9380203

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

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