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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BMW X3 Series E83 E83N LCI Support Bracket Navigation Computer 3405141

€23.95

Free delivery: Sep 14 – 15

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Part no. 04L907309G-1

Volkswagen New Beetle 2.0 TDI CUUA 110HP Engine Unit ECU Kit 04L907309G Manual

€222.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. FK72-14633-BDD

Land Rover Discovery Sport L550 Rear Wiring Loom Harness Left N/S FK72-14633-BDD

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5M5T-14B192-AA-1

Ford Transit Mk8 Relay 4-Pin Black 12V 20A SET X2 5M5T-14B192-AA

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. BT4A-7H417-CB

Ford Kuga Mk2 Transfer Case Control Module Unit 2.0 TDCi AWD BT4A-7H417-CB

€37.95

Free delivery: Sep 14 – 15

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Part no. A2025405981

Mercedes Sprinter W907 W910 Wiring Cable Plug OBD Socket A2025405981 A9070005999

€23.95

Free delivery: Sep 14 – 15

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Part no. DE8T-19H463-BB

Ford B-Max Front Windscreen Rain Sensor Control Unit Module DE8T-19H463-BB

€23.95

Free delivery: Sep 14 – 15

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BMW E65 E66 GPS DVD CD Computer Reader Head Unit 5A50601

€132.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2479008109

Mercedes V177 W247 Body Control Module BCM V2 Unit ECU A2479008109

€118.95

Free delivery: Sep 14 – 15

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Part no. A2129001929

Mercedes W176 Keyless Control Module Unit ECU A2129001929

€23.95

Free delivery: Sep 14 – 15

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Part no. CPLA-14B484-AF

Land Rover Range Rover L405 Body Control Module Unit ECU CPLA-14B484-AF

€66.95

Free delivery: Sep 14 – 15

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Part no. 443937105B-1

Volkswagen Audi Skoda Seat Thermal Fuse Relay Amp 15A 12V 443937105B

€23.95

Free delivery: Sep 14 – 15

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Part no. A2059007143

SAM Module Mercedes W205 Trunk Rear SAM Control Module A2059007143

€85.95

Free delivery: Sep 14 – 15

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Part no. FK72-14B673-AD

Land Rover Discovery Sport L550 Tailgate Controle Module Unit ECU FK72-14B673-AD

€23.95

Free delivery: Sep 14 – 15

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Part no. 8T0907468

Audi A4 B8 A5 S5 Gateway Diagnosis Interface ECU Data Module 8T0907468G

€56.95

Free delivery: Sep 14 – 15

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Part no. 4K0937517E

Audi A6 C8 Relay Voltage Converter Current Relay Control Module 4K0937517E

€28.95

Free delivery: Sep 14 – 15

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Part no. 9187221

BMW E87 LCI Alpine Navi Japan Navigation HDD Navigation System 9187221

€170.95

Free delivery: Sep 14 – 15

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Part no. YTA500521

Land Rover L319 Positive Terminal HV Battery Lead Cable Wire Harness YTA500521

€23.95

Free delivery: Sep 14 – 15

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Part no. 81A971030AF

Audi Q2 GA Door Wiring Loom Harness Front Passenger's Side N/S 81A971030AF

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2058201201

Sunroof Wiring Mercedes C205 C238 Panoramic Motor Cable Harness A2058201201

€23.95

Free delivery: Sep 14 – 15

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Part no. 3G0971689

Volkswagen Passat B8 3G Door Wire Cable Harness Loom Rear Left N/S 3G0971689

€70.95

Free delivery: Sep 14 – 15

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Part no. A2034404432

PDC Wiring Mercedes CL203 Front Bumper Parking Sensor Loom Cable A2034404432

€66.95

Free delivery: Sep 14 – 15

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Part no. HPLA-14F041-BG

Range Rover Sport L494 Body Control Module Unit BCM ECU HPLA-14F041-BG

€123.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7570254

Plus Cable BMW X1 E81 E87 E90 E91 N45 N46 Alternator Starter Wiring 7570254

€23.95

Free delivery: Sep 14 – 15

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Part no. 5A234D0

Wiring Cable BMW F06 F12 F13 Electric Parking Hand Brake Handbrake Cable 5A234D0

€42.95

Free delivery: Sep 14 – 15

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Part no. A9079020303

Mercedes Sprinter W907 W910 AIr Module Sensor Unit ECU A9079020303

€113.95

Free delivery: Sep 14 – 15

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Part no. 6G92-15K866-BJ

Land Rover Freelander 2 L359 Parking Assist PDC Control Unit 6G92-15K866-BJ

€23.95

Free delivery: Sep 14 – 15

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Part no. NNW504640

Range Rover Velar L560 Differential Locking Module Control Unit NNW504640

€47.95

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Part no. GK2T-18C815-HG

Ford Transit Custom Stereo Radio Media Head Unit CD Player GK2T-18C815-HG

€85.95

Free delivery: Sep 11 – 15

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Part no. 7L0971767

Volkswagen Touareg 7L Washer Reservoir Bottle Wiring Harness Loom 7L0971767

€23.95

Free delivery: Sep 14 – 15

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Part no. M8D2-14E719-AVC

Land Rover Evoque L551 Front Seat Wiring Loom Harness Left N/S M8D2-14E719-AVC

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 2447525

Telematics Module BMW F21 Bluetooth Control Unit ECU 2447525

€51.95

Free delivery: Sep 14 – 15

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Part no. 7583526-1

BMW X3 Series E83 2.5si N52N 218HP Engine ECU Kit DME + Key 7583526 Manual

€332.95

Free delivery: Sep 14 – 15

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Part no. 6812248

BMW X1 F48 Front Door Wiring Loom Harness Cable Driver Side 6812248

€42.95

Free delivery: Sep 14 – 15

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Part no. 7605061-2

BMW F10 F30 N20 Alternator Generator 14V 170A Diesel Denso DAN1126

€66.95

Free delivery: Sep 14 – 15

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Part no. L8A2-14D374-CD

Land Rover Range Rover Velar L560 Air Module Control Unit L8A2-14D374-CD

€199.95

Free delivery: Sep 14 – 15

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Part no. UM466696Y

Ford Ranger Mk4 Door Loud Speaker Loudspeaker Front Left N/S UM466696Y

€23.95

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Part no. A1729008206

Interface Module Mercedes W176 W204 W212 Multimedia Control Unit A1729008206

€23.95

Free delivery: Sep 14 – 15

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Part no. 7E0971478C

Volkswagen Transporter T5 Additional Heater Wiring Harness Loom Cable 7E0971478C

€42.95

Free delivery: Sep 14 – 15

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Part no. 4H0907383N

Porsche Macan 95B Trailer Detection Control Module Unit ECU 4H0907383N

€213.95

Free delivery: Sep 14 – 15

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BMW G20 G21 Negative Battery Cable Wiring Hybrid 8704694

€28.95

Free delivery: Sep 14 – 15

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Part no. 4H0971224BA

Audi A8 D4 Alternator Starter Motor Wiring Harness Cable Loom 4H0971224BA

€56.95

Free delivery: Sep 14 – 15

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Part no. FK72-14632-BDD

Land Rover Discovery Sport L550 Rear Wiring Loom Harness Right O/S FK7214632BDD

€28.95

Free delivery: Sep 14 – 15

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Part no. A2213201058

Mercedes R231 Valve Block Air Suspension Control Unit A2123200358

€203.95

Free delivery: Sep 14 – 15

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Part no. N1XT-14630-TFE

VW Volkswagen Amarok NF Front Door Harness Wiring Passenger Side N1XT14630TFE

€42.95

Free delivery: Sep 14 – 15

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Part no. A2118703485

Mercedes W211 Door Module Rear Right O/S Control Unit ECU A2118703485

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. R8E2-14D618-CA

Land Rover Discovery L550 Front Door Control Module Driver Side R8E2-14D618-CA

€80.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 02M911023G

VW Volkswagen Golf 1K 2.0 TFSI BWA Starter Motor 02M911023G

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7118854

BMW Z4 Series E85 Cable Loom Wiring Harness Rear Window Heating 7043906

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5G4971694B

Volkswagen Golf Mk7 Rear Door Wiring Harness Cable Right O/S 5G4971694B

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5M5T-14B192-DA

Land Rover Freelander L359 Relay 4-Pin Black 12V 40A FOMOCO 5M5T-14B192-DA

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7848639

BMW F06 LCI F07 LCI F10 F11 LCI Steering Wheel Lane Change Control Unit 7848639

€151.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009006302

Mercedes W176 Automatic Gearbox Transmission Module Control Unit ECU A0009006302

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0959793S

Audi A4 B8 Front Door Control Module Unit ECU 8K0959793S

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. FK72-19C164-ZF

Land Rover Discovery Sport L550 Radio Audio Sound Amplifier FK72-19C164-ZF

€75.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4H0959655H

Audi A7 4G8 Air Module Control Unit ECU SRS Module Unit 4H0959655H

€23.95

Free delivery: Sep 14 – 15

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Part no. 9321022

BMW Mini Cooper F55 F56 F57 B Junction Terminal Box 300-400 W 9321022

€23.95

Free delivery: Sep 14 – 15

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Part no. 4H0907182H

Audi A8 D4 4H Front Seat Backrest Control Module Unit ECU 4H0907182H

€23.95

Free delivery: Sep 14 – 15

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Part no. 6812240

BMW F45 F46 Door Card Wiring Harness Adapter Cable Front Right O/S 6812240

€28.95

Free delivery: Sep 14 – 15

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Part no. LR143644

Range Rover Evoque L551 Transmission Harness 2.0 Diesel M8D2-7C078-BB

€70.95

Free delivery: Sep 14 – 15

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Part no. 5J6945112A-2

Skoda Fabia Mk3 Rear Tail Light Wiring Harness Cable Plug Right O/S 5J6945112A

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. FK72-14A614-ADC

Land Rover Discovery Sport L550 Steering Gear Wire Loom Harness FK72-14A614-ADC

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F0971981A

Audi A6 C6 Fuse Box Holder Cover Cap Lid 2.0 TFSI 4F0971981A

€23.95

Free delivery: Sep 14 – 15

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Part no. A1715400107

Mercedes SLK R171 Window Lifter Lift Switch Cable Wiring Harness A1715400107

€23.95

Free delivery: Sep 14 – 15

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Part no. 8617320

BMW G11 G12 G30 G31 Inverter Converter Bracket Mount B48X 8617320

€32.95

Free delivery: Sep 14 – 15

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Part no. 6G9T14A631AF

Ford Mondeo Mk4 Front Door Jumper Wire Assembly Vents Loom Left N/S 6G9T14A631AF

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8T0971035AR-1

Audi A5 S5 RS5 8T Door Card Wiring Loom Harness Wire Driver's Side 8T0971035AR

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6844137

BMW G20 G21 G23 G26 G29 Battery Positive Terminal Cover Lid Bracket 6844137

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 03L906018DR

Volkswagen Touran 1T 2.0 TDI CFHC 140HP Engine ECU 03L906018DR Automatic

€113.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. DV6T-14297-AE

Ford Transit Connect Front Wiper Motor Wiring Loom Harness Cable DV6T-14297-AE

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2469055003-1

Ignition Switch Mercedes W167 W177 W247 Lock Control Unit Module A2469055003

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6977982-2

Mini Cooper R50 R53 R56 R57 R60 Relay No Contact Taubenblau Blue Set 2X 6977982

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 95B907553T

Porsche Macan 95B Air Suspension Control Module Unit ECU 95B907553T

€237.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. GK2T-10300-CD

Ford Transit Custom S-Max Alternator Generator 240A 2.0 TDCi GK2T-10300-CD

€75.95

Free delivery: Sep 11 – 15

If paid before 14:00

Part no. LR062008

Range Rover Sport L494 Glow Plug Wiring Loom Left N/S FW93-12A378-AB

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 95B971030FP

Porsche Macan 95B Door Wiring Harness Loom Cable 95B971030FP

€66.95

Free delivery: Sep 14 – 15

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Part no. A6519006401-2

Mercedes W205 C300h 651.921 204HP Engine ECU Kit Key + Ignition A6519006401

€180.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. AH42-18B008-AH

Range Rover L322 Air Suspension Control Module Unit ECU AH42-18B008-AH

€23.95

Free delivery: Sep 14 – 15

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Part no. 51794732

Fiat Panda Mk2 Under Bonnet Relay Fuse Box Cover Housing 1.1 Petrol 51794732

€23.95

Free delivery: Sep 14 – 15

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Part no. 2538696

Ford Kuga C482 Door Edge Protector Front Left N/S LV4B-S201A57-AE

€56.95

Free delivery: Sep 14 – 15

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Fiat Ducato 2.2 Diesel Multijet Engine Starter Motor Unit 12V DENSO 51984362

€146.95

Free delivery: Sep 14 – 15

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Part no. A2038703589

Mercedes W203 CD Player Radio Audio Sat Nav Navigation A2038703589

€146.95

Free delivery: Sep 14 – 15

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Part no. 8E0057185KX

Audi A4 B7 Radio Media Player Audio CD Head Unit Player Concert 8E0057185KX

€94.95

Free delivery: Sep 14 – 15

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Part no. 02M911021B

VW Volkswagen Golf Mk6 Tiguan Mk1 Audi Q3 Mk1 VALEO Starter Motor 02M911021B

€32.95

Free delivery: Sep 14 – 15

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Range Rover L405 Radio Isolator Module Unit CPLA-18K891-AA

€23.95

Free delivery: Sep 14 – 15

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Part no. 5G4971693B

Volkswagen Golf Mk7 Rear Door Wiring Harness Cable Left N/S 5G4971693B

€37.95

Free delivery: Sep 14 – 15

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Part no. 8X0971036J

Audi A1 8X Door Card Wiring Harness Cable Loom Front Passenger Side 8X0971036J

€23.95

Free delivery: Sep 14 – 15

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Part no. AH42-14B192-AA

Land Rover Freelandr L359 Relay 4-Pin Black 12V 20A Unit AH42-14B192-AA

€23.95

Free delivery: Sep 14 – 15

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Part no. 98761267000

Porsche Cayman 987 Tailgate Wiring Harness Cable 98761267000

€37.95

Free delivery: Sep 14 – 15

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Part no. 6824116

BMW 3 F30 LCI 330e Hybrid High Voltage Battery Wiring Inverter Cable 6824116

€94.95

Free delivery: Sep 14 – 15

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Part no. A6429004300

Mercedes W221 Engine Control Unit Module ECU A6429004300

€189.95

Free delivery: Sep 14 – 15

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Part no. E90-ANDROID-3

BMW E84 E90 Infotainment Media System Unit 9" Screen GPS Android CarPlay

€165.95

Free delivery: Sep 14 – 15

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Range Rover Vogue L405 Rear Screen Socket USB Output Port Panel CK52-19C166-AA

€66.95

Free delivery: Sep 14 – 15

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Part no. 3C4971294NL

Volkswagen Passat B6 Control Module Wiring Harness 3C4971694NL

€37.95

Free delivery: Sep 14 – 15

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Part no. 3W83-9D372-AB

Range Rover Velar L560 Fuel Pump Module Unit ECU 2.0 Diesel 3W83-9D372-AB

€42.95

Free delivery: Sep 14 – 15

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Part no. 9468428

BMW G20 G30 Cell Monitoring Circuit Cell Supervision Module ECU Control 9468428

€85.95

Free delivery: Sep 14 – 15

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Part no. A2465407811

Mercedes A45 AMG W176 Door Wiring Loom Harness Wire Rear Left N/S A2465407811

€108.95

Free delivery: Sep 14 – 15

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Part no. A2035407308

Mercedes-Benz C-Class W203 Rear Left Right Door Wiring Loom Harness A2035407308

€23.95

Free delivery: Sep 14 – 15

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Part no. 8T0971035AR

Audi A5 S5 RS5 8T Door Card Wiring Loom Harness Wire Driver's Side 8T0971035AR

€23.95

Free delivery: Sep 14 – 15

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