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

€222.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049060205-5

Mercedes W204 Rear SAM Module Fuse Box Relay Control Unit A2049060205

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. FM5A-12A650-AHA

Ford Focus ST Mk3 Engine Control Unit ECU Kit FM5A-12A650-AHA Manual

€208.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W0937530

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

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 8H22-10F845-AA

Land Rover Range Rover L322 Bluetooth Phone ECU Control Module 8H22-10F845-AA

€104.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8E0907307D

Audi A4 B7 Servotronic Steering Control Unit Module 8E0907307D

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8W8971030AC

Audi A5 F5 Front Passenger's Door Wiring Harness Loom 8W8971030D

€61.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

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: Sep 23 – 24

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: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. XQE000110PMA

Land Rover Freelander L314 Under Seat CD Changer Alpine XQE000110PMA

€56.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. K95301AE

Range Rover Sport L494 Discovery Parking Aid Control Module ECU K95301AE

€32.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 5A323C8

BMW F40 Fuse Relay Power Distribution Box Unit 5A323C8

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 8602973

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

€42.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 7L6971694H

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

€23.95

Free delivery: Sep 23 – 24

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: Sep 22 – 24

If paid before 14:00

Part no. 52218981

Vauxhall Movano C Fuse Box Cover Housing Bracket Case Enclosure 52218981

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2711500391-1

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

€284.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

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: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 4F0959655E

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

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. MB3T-14A411-SLC

VW Volkswagen Amarok NF Wiring Harness Loom Cable MB3T14A411SLC

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9231369

BMW F02 F10 F12 Multimedia TV DVD Remote Unit 9231369

€146.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7542934

BMW E60 E61 E65 N62N Petrol Alternator Generator 180A 7542934

€170.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8V3971036A

Audi A3 S3 8V Front Door Card Wiring Harness Passenger Side 8V3971036A

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. L1TT-14D624-CBC

Ford Puma St Cf7 Front Door Ambient Lighting Left Right N/O/S L1TT-14D624-CBC

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 420035503-1

Audi R8 42 GSM Antennna Receiver Amplifier Radio 420035503

€213.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7540203

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

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 5B3E981

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

€104.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2479002216

Mercedes C118 W177 W247 W907 Bluetooth Control Unit Module ECU A2479002216

€47.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8364542

BMW E46 X3 E83 Power Distribution Fusebox Cover Fuse Box 8364542

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 8V4971030AE

Audi RS3 8V Front Passenger Door Wiring Harness Loom Cable Left N/S 8V4971030AE

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A9078209600

Mercedes W907 L2H2 Electric Radio Player Head Unit A9078209600

€218.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. A1725400035

Electrical Cable Mercedes R172 Transmission To Body Wiring Harness A1725400035

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. C48041101

Range Rover Sport L494 Rear Tailgate Module Wiring Loom Harness C48041101

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 2755518

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

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. A2055456300

Mercedes C205 Rear Control Unit Module Bracket Mount Holder Support A2055456300

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. YMQ501730

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

€23.95

Free delivery: Sep 23 – 24

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: Sep 23 – 24

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: Sep 23 – 24

If paid before 14:00

Part no. 6810512

BMW F30 Negative Battery Lead Cable Wiring 6810512

€51.95

Free delivery: Sep 23 – 24

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: Sep 22 – 24

If paid before 14:00

Part no. 5B79161

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

€142.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 3C8035279B

Volkswagen Scirocco Mk3 Passat CC Sat Nav Radio CD Player Head Unit 3C8035279B

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2115451528

Mercedes W204 Cable Connector Plug Wiring Loom A2115451528

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. TC91675G2J

Ford Ranger Mk4 BT-50 Alarm Immobiliser ECU Control Module TC91675G2J

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5H32-14N131-MA

Range Rover Sport L320 Wiring Harness Loom Front Driver's Seat 5H32-14N131-MA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5E0971104B

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

€70.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2046280218

Mercedes W204 Battery Bracket Mount Support Holder A2046280218

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 4M0959793M

Audi S5 F5 Front Door Control Module Unit Driver Side 4M0959793M

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 5Q0907530AC

Volkswagen Golf Mk7 Gateway Control Unit Module 5Q0907530AA

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0009004639

Mercedes W177 Rear Blind Spot Control Module Unit Left Right N/O/S A0009004639

€61.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. BH42-14D617-AA

Land Rover 4 L319 Front Door Control Unit Module Passenger Side BH42-14D617-AA

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8X0919475AE

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7L5035741G

Porsche Cayenne 9PA Telephone Phone Control Unit Module 7L5035741G

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A0131541702

Alternator Mercedes W638 OM611 Engine Alternator Generator A0131541702

€85.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 8T0941006D-2

Audi A5 8T Front Headlight Wiring Loom Harness Cable Right O/S 8T0941006D

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9153418-2

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

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. F20-DASH-CAM

BMW F20 HD Front View Dash Cam Interior Mirror Cover Set

€132.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. YWQ100031

Land Rover Freelander L314 Interface Audio Navigation Control Module YWQ100031

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 83A947356C

Audi Q3 F3 LED Front Door LED Lighting Module Control Unit Right O/S 83A947356C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 079903015P

Audi A7 S7 4G 4.0 TFSI Petrol Engine Alternator Generator 079903015P

€66.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. F1ET-14B532-BE

Ford Focus Mk3 Kuga Mk2 Rear Door Control Module Left Right N/O/S F1ET-14B532-BE

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2709060500

Ignition Coil Mercedes W176 W204 C207 W212 Petrol Cable Connector A2709060500

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. GK62-14E108-AB

Range Rover Sport L494 Rear Tailgate Hands Free Motion Sensor GK62-14E108-AB

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0971349AM

VW Golf Mk6 Scirocco Mk3 Starter Wiring Harness Cable 1K0971349AM

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2208100112

Mercedes W220 Sun Visor Mount Loom Harness Wire Cable A2208100112

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. R8E2-14E159-AG

Land Range Rover Evoque Defender Air Control Unit Module ECU R8E2-14E159-AG

€284.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. XBC501773LZN-2

Range Rover Sport L320 Headlight Bi-Xenon Wiring Front Left N/S XBC501773LZN

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7634063

Gearbox Wiring BMW F10 F11 520i 528i N20 Automatic Engine Loom Harness 7634063

€75.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 9G9T-14B534-BC

Ford Mondeo Mk4 Rear Door Window Motor Module Left Right N/O/S 9G9T-14B534-BC

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 7641003-2

Mini Cooper S R55 R56 R57 N14 1.6 174HP ECU Kit DME 7641003 CAS3 Key Automatic

€617.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 82A945091C-2

Audi A1 GB Rear LED Tail Light Lamp Wiring Plug Cable Left N/S 82A945091C

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 46349347

Vauxhall Movano C Glow Plug Preheat Relay Controller Module 2.2 Diesel 46349347

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2465408109

Door Wiring Mercedes W176 Loom Cable Rear Left Right N/O/S A2465408109

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2215403108

Mercedes W221 Door Wiring Front Right O/S Harness Loom Cable A2215403108

€28.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. M8A2-14B518-BB

Land Rover Range Rover Velar L560 Door Wiring Loom Rear Right O/S M8A2-14B518-BB

€37.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 1K0937087L

Volkswagen Golf Mk6 Body Control Unit Module BCM ECU 1K0937087L

€113.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 057911022

Audi Q7 4M Engine Starter Motor Actuator Starter Valeo 3.0 TDI Diesel 057911022

€32.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2475402228

Mercedes W177 Recirculation Pump Wiring Loom Cable Harness A2475402228

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 431951253H

Audi TT 8N A4 B5 A6 C5 A8 D2 Relay Control Unit Module 12V 4 Pins 431951253H

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2045400017

Mercedes W164 X164 Distronic Radar Sensor Cruise Control A2045400017

€374.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2049055902

Mercedes-Benz W204 W212 W221 Radio Remote Control Keyless Key Button A2049055902

€42.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. XRC8259-1

BMW X1 E84 10.25" CIC Screen Display Multimedia Head Unit 32GB XRC8259

€142.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. A2055407112

Mercedes W205 Battery Wiring Loom Harness Cable A2055407112

€51.95

Free delivery: Sep 23 – 24

If paid before 14:00

Part no. 98661314300

Porsche Boxster S 986 Central Locking Switch Relay 5 Pins 98661314300

€23.95

Free delivery: Sep 23 – 24

If paid before 14:00

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