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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Mercedes W177 Glow Plug Relay Preglow Module Diesel OM654 A6549009900

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6970889

BMW 7 Series E65 E66 E67 Sensor Vehicle Centre Airbag 6970889

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9387452-2

Mini F55 F56 Dashboard Central Information Display Sat Nav Screen 8.8" 9387452

€336.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9294912-1

BMW F10 F11 X5 F15 X6 F16 Rear Seat Compartment Screen Display 9294912

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3B0951253

Volkswagen Golf 5G Caddy 2K Crafter SY Heated Windscreen Relay 4-Pin 3B0951253

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2K2945096T-1

VW Volkswagen Caddy Maxi 2k Rear Tail Light Lamp Plug Cable Left N/S 2K2945096T

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 52218980

Vauxhall Movano C Fuse Box Cover Covering Lid Top Housing 52218980

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0907159D

Volkswagen Golf Mk7 Sound Actuator Control Unit Module 4H0907159A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3C8941753R-2

Volkswagen Passat CC Front Headlight Wiring Harness Cable Left N/S 3C8941753R

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5F4971145

Seat Leon Mk3 5F Tailgate Boot Trunk Cable Wiring Loom Harness 5F4971145

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7E0915181G

Volkswagen Transporter T6 Camper T5 Battery Wiring Loom Harness Cable 7E0915181G

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5N0131552D

VW Volkswagen Tiguan 5N DPF Sensor Mount Bracket Holder Retainer 5N0131552D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. EJ32-14301-AC-1

Range Rover Evoque L538 Negative Battery Cable Terminal EJ32-14301-AC

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0971693M

Audi A4 B9 A5 F5 Door Wiring Loom Harness Cable Rear Left Right N/O/S 8W0971693M

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. M8A2-14632-DB

Land Rover Range Rover Velar L560 Door Wiring Loom Rear Right O/S M8A2-14632-DB

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5B3E982

Mini F65 F66 F67 Negative Minus Battery Cable Clamp IBS 5B3E982

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8592700

Glow Plug Wiring BMW F48 Mini F57 Wiring Harness Engine Module 8592700

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5A1B272-1

Mini Cooper F60 SE ALL4 B38X 220HP Engine Control ECU DME 5A1B272 Automatic

€427.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 98661313300

Porsche Boxster 986 Rear Windscreen Heating Switch Relay 5 Pins 98661313300

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. CV1T-14B533-AC

Ford B-Max Mk1 Front Door Module Control Unit Passenger's Side CV1T-14B533-AC

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8P4971035J

Audi A3 8P Door Wiring Harness Loom Cable Front Right O/S 8P4971035J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. EJ32-14A076-CA

Range Rover Evoque L538 Fuse Box Relay Cover Cap EJ32-14A076-CA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 473974AR

Audi A5 8T Head Unit Multimedia Screen Display Android Unit Rear Camera

€237.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 95B907530E

Porsche Cayenne 92A Body Gateway Module ECU Control Unit 95B907530E

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9381581

BMW i3 I01 IBS Cable Negative Battery Lead Wiring Harness Control Unit 9381581

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8X0971036T

Audi A1 8X Front Door Card Wiring Harness Loom Cable Left N/S 8X0971036T

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8S0820047

Audi TT FV 8S A/C Air Condition Climate Control Module Unit ECU 8S0820047

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9378071

BMW F12 F12 LCI Convertible Top Module 9378071

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9139899

BMW F07 F10 LCI F06 F12 F13 MMI Multimedia CD Player Reader Head Unit 9139899

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6927310

BMW E60 Seat Control Unit Module Left Right N/O/S Temic 6927270

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0035462-1

Audi A5 8T MMI Multimedia Interface Unit Module Control ECU 8T0035462

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7171587

Mini R60 Xenon Headlight Adaptive Ballast Control Unit 7171587

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9213373

Mini Cooper R57 Convertible Cabrio Petrol Fuse Box 9213373

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0038202826

Mercedes W164 W216 W221 W251 W639 W906 Crash Sensor Impact Control A0038202826

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. JK62-13404-AH-2

Range Rover Sport L494 Tail Light LED Right O/S Harness Wire Loom JK62-13404-AH

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 82A945094C-2

Audi A1 GB Rear LED Tail Light Lamp Wiring Plug Cable Right O/S 82A945094C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. LR053540-2

Range Rover L405 Rear Tail Lamp Light Plug Cable Wiring Left N/S EK5M-13405-AA

€23.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 8V4971035A

Audi A3 8V Front Door Wiring Loom Harness Cable Driver Side 8V4971035A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9345321

BMW F01 F02 Body Control Module Junction Box ECU 9345321

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5N0035554J

Audi Q7 4L VW Passat A3 Touareg 7P Multimedia Interface Cable Media 5N0035554J

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F9035225D

Audi A6 C6 Antenna Amplifier Control Unit Module ECU 4F9035225D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8S0907159B

Audi TT FV Acoustic Controller Control Module Unit ECU 8S0907159B

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0959655C

Audi Q7 4L Air Module Control Unit ECU Impact Sensor 4L0959655C

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 02E911024D

Volkswagen Golf Mk7 Audi A3 8V Engine Starter Motor Start Stop Denso 02E911024D

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. NU5T-15604-KACN

VW Volkswagen Amarok Mk2 BCM Body Control Module Control Unit NU5T-15604-KACN

€222.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0937530

Audi Q7 4M Fuse Box Module Holder Relay Box 8W0937530

€23.95

Free delivery: Aug 10 – 11

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 10 – 11

If paid before 14:00

Part no. 8E0907307D

Audi A4 B7 Servotronic Steering Control Unit Module 8E0907307D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5H2Z-14B345-BA-1

Land Rover Discovery 4 L319 Air Module Crash Impact Sensor 5H2Z-14B345-BA X2

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W6945093D-2

Audi S5 F5 Inner Rear Tail Light Lamp Wiring Cable Left N/S 8W6945093D

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5H0945208A-2

VW Golf Gti CD1 LED Tail Light Rear Lamp Cable Plug Wire Right O/S 5H0945208A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0959795Q

Audi A5 B8 8T Door Module Control Unit Left Right N/O/S 8T0959795Q

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. XQE000110PMA

Land Rover Freelander L314 Under Seat CD Changer Alpine XQE000110PMA

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A947356A

Audi Q3 F3 LED Front Door LED Lighting Module Control Unit Right O/S 83A947356A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. K95301AE

Range Rover Sport L494 Discovery Parking Aid Control Module ECU K95301AE

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8D0951253A-1

VW Audi Seat Skoda Multi Use Relay Module 4 Pins 373 Black 12V 40A 8D0951253A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A6395406609

Wiring Loom Vito Mercedes W639 Front Door Cable Left Right N/O/S A6395406609

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5A323C8

BMW F40 Fuse Relay Power Distribution Box Unit 5A323C8

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2055450700

Mercedes W205 W213 C253 Battery Busbar Cap Cover Trim Left N/S A2055450700

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8602973

Battery Cable BMW F45 Mini F54 F56 B48 Alternator Starter Wiring 8602973

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. JK62-13405-AH-2

Range Rover Sport L494 Tail Light Outer Left N/S Harness Wire Loom JK62-13405-AH

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L6971694H

Volkswagen Touareg 7L Rear Door Wiring Loom Harness Cable 7L6971694H

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V4971030

Audi A3 8V Front Door Wiring Loom Harness Passenger Side 8V4971030

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8T0941004BB-2

Audi A5 8T Front Right Halogen Headlight Headlamp Wiring Right O/S 8T0941004BB

€23.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 52218981

Vauxhall Movano C Fuse Box Cover Housing Bracket Case Enclosure 52218981

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2711500391-1

Mercedes W212 E200 BlueEFFICIENCY M271.860 184HP Engine ECU A2711500391

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3C8941754R-2

Volkswagen Passat CC Front Headlight Wiring Harness Cable Right O/S 3C8941754R

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0055421218

Crash Sensor Mercedes W176 W204 W212 Impact Airbag Unit Module A0055421218

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06H903017EX

Audi A3 8P Engine Alternator Generator 14V 140A 1.8 TFSI CDAA 06H903017E

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8573260-4

ECU Kit BMW F20 F21 116d ed Diesel N47N 116HP DDE 8573260 Key FEM Lock Manual

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4F0959655E

Audi A6 C6 SRS Crash Air Module Safety ECU Unit Control 4F0959655E

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. MB3T-14A411-SLC

VW Volkswagen Amarok NF Wiring Harness Loom Cable MB3T14A411SLC

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7542934

BMW 5 6 7 Series E60 E61 E65 N62N Petrol Alternator Generator 180A 7542934

€170.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 420035503-1

Audi R8 42 GSM Antennna Receiver Amplifier Radio 420035503

€213.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7540203

BMW X5 Series E70 Control Unit DME Module Emergency Release Lock 7582630

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8516739-3

Mini Cooper D R55 R56 LCI R60 N47N Engine ECU Kit DDE 8516739 CAS3 Key Automatic

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5B3E981

BMW F70 F74 F78 Battery Negative Minus - Earth Lead Cable Wiring 5B3E981

€104.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2479002216

Mercedes C118 W177 W247 W907 Bluetooth Control Unit Module ECU A2479002216

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8517862-15

BMW F10 F20 F30 F32 Engine Control Unit Diesel N47N 184HP xDrive ECU DDE 8517862

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A9078209600

Mercedes W907 L2H2 Electric Radio Player Head Unit A9078209600

€218.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. HU5T-15K866-AE

Ford Fiesta St Parking Aid System Module Distance Control Unit HU5T-15K866-AE

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1725400035

Electrical Cable Mercedes R172 Transmission To Body Wiring Harness A1725400035

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. C48041101

Range Rover Sport L494 Rear Tailgate Module Wiring Loom Harness C48041101

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2755518

Mini R55 R56 R57 Battery Tray Holder Mounting Bracket Housing Box 2755518

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7P5945095F-2

Porsche Cayenne 92A 958 Rear Tail Light Lamp Wiring Harness Left N/S 7P5945095F

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. CK52-14N144-BD

Land Rover Range Rover L405 Battery Positive Wiring Harness Cable CK52-14N144-BD

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. YMQ501730

Range Rover Sport L320 Front Seat Control Wire Loom Harness Cable YMQ501730

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4H0035670P

Audi A8 S8 4H A8 D4 MMI Control Unit Player MMI 3G+ SAT NAV Bluetooth 4H0035670P

€237.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7CA971819B

VW Crafter SY AdBlue Tank Wiring Loom 2.0 TDI Diesel 103kW 140HP 7CA971819B

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5F4971693

Audi A1 8X Door Window Switch Loom Cable Rear Left Right N/O/S 5F4971693

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. LR144095

Range Rover Sport L494 Alternator Generator 3.0D D300 MHEV KPLA-11A240-BA

€759.95

Free delivery: Aug 7 – 11

If paid before 14:00

Part no. 5B79161

Mini F66 Door Control Unit Module Driver's Side 5B79161

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 99661511700

Porsche Boxster 986 Rear Screen Heating Relay Module 99661511700

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5E0971104B

Skoda Octavia Mk3 5E Rear Bumper Parking Sensor Wiring Harness Loom 5E0971104B

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2046280218

Mercedes W204 Battery Bracket Mount Support Holder A2046280218

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5Q0907530AC

Volkswagen Golf Mk7 Gateway Control Unit Module 5Q0907530AA

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L0937503-1

Volkswagen Touareg 7L Relay Housing Plate Module Control Unit 7L0937503

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8X0919475AE

Audi A1 8X PDC Assistance Parking Distance Control Module Unit ECU 8X0919475AE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7L5035741G

Porsche Cayenne 9PA Telephone Phone Control Unit Module 7L5035741G

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

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