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

€70.95

Free delivery: Sep 14 – 15

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Part no. A2046280218

Mercedes W204 Battery Bracket Mount Support Holder A2046280218

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4M0959793M

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

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0907530AC

Volkswagen Golf Mk7 Gateway Control Unit Module 5Q0907530AA

€37.95

Free delivery: Sep 14 – 15

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 14 – 15

If paid before 14:00

Part no. 7L5035741G

Porsche Cayenne 9PA Telephone Phone Control Unit Module 7L5035741G

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0131541702

Alternator Mercedes W638 OM611 Engine Alternator Generator A0131541702

€85.95

Free delivery: Sep 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

If paid before 14:00

Part no. YWQ100031

Land Rover Freelander L314 Interface Audio Navigation Control Module YWQ100031

€23.95

Free delivery: Sep 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

If paid before 14:00

Part no. A2709060500

Ignition Coil Mercedes W176 W204 C207 W212 Petrol Cable Connector A2709060500

€23.95

Free delivery: Sep 14 – 15

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 14 – 15

If paid before 14:00

Part no. 1K0971349AM

VW Golf Mk6 Scirocco Mk3 Starter Wiring Harness Cable 1K0971349AM

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2208100112

Mercedes W220 Sun Visor Mount Loom Harness Wire Cable A2208100112

€23.95

Free delivery: Sep 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

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

€636.95

Free delivery: Sep 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

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 14 – 15

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Part no. 1K0937087L

Volkswagen Golf Mk6 Body Control Unit Module BCM ECU 1K0937087L

€113.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A9064400713

Mercedes Sprinter W906 Fuel Tank Wiring Loom Harness Cable Diesel A9064400713

€23.95

Free delivery: Sep 14 – 15

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 14 – 15

If paid before 14:00

Part no. A2475402228

Mercedes W177 Recirculation Pump Wiring Loom Cable Harness A2475402228

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6700003892

Smart Fortwo C453 Power Steering Column Control Unit Module 6700003892

€37.95

Free delivery: Sep 14 – 15

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 14 – 15

If paid before 14:00

Part no. A2045400017

Mercedes W164 X164 Distronic Radar Sensor Cruise Control A2045400017

€374.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2049055902

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

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055407112

Mercedes W205 Battery Wiring Loom Harness Cable A2055407112

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 98661314300

Porsche Boxster S 986 Central Locking Switch Relay 5 Pins 98661314300

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2515401730

Mercedes V251 Positive Battery Cable Wiring Loom Harness A2515401730

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6907329

BMW E65 Door Cable Guide Rear Left N/S Wiring Loom Bracket Trim Cover 6907329

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4K0915171E

Audi A6 C8 A7 4K Hybrid Lithium Battery Housing Bracket 4K0915171E

€66.95

Free delivery: Sep 11 – 15

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Part no. 0CJ927749A

Audi A6 C8 Transfer Box Control Unit Four-Wheel Drive Module ECU 0CJ927749A

€284.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9366339

BMW G32 GT Door Wiring Harness Loom Cable Rear Left Right N/O/S 9366339

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. HK83-14D619-BB

Land Rover Discovery L550 Door Module Control Unit Rear Left N/S HK83-14D619-BB

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1K0915418F

VW Volkswagen Golf Mk6 HV Battery Jacket Cover Housing 1K0915418F

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9205269

BMW X5 E70 X6 E71 Mini Cooper R55 R56 R57 6 Disc CD Changer 9205269

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9203304

BMW X5 Series E70 Cable Loom Door Rear Left Right N/O/S Wiring Harness 9207857

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2229063202-1

Fuse Box Mercedes W205 W222 Electrical Relay Box Module Unit A2229063202

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4F0051510Q

Audi A5 8T A6 C7 USB Adapter Port Socket Connector Cable Wiring 4F0051510Q

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. GJ32-14D374-AB

Range Rover Evoque L538 Air Module Control Unit GJ32-14D374-AB

€61.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 2S6T-432A98-AF

Ford Fiesta St Mk5 Tailgate Trunk Boot Lid Lock Actuator Solenoid 2S6T-432A98-AF

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. GK62-14E110-AA

Range Rover Sport L494 Tailgate Handsfree Motion Sensor Unit GK62-14E110-AA

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1378238

BMW E60 E63 E87 E90 E91 Relay Make Contact Orange 1378238

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2124400706

Wiring Harness Mercedes W212 LED Lighting Air Nozzle Cable A2124400706

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. YWC500440

Range Rover Sport L320 Xenon Ballast Control Unit Module YWC500440

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9205476

BMW 1 Series E81 E87 LCI Positive Battery Lead Distribution Box Cable Rear

€85.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2038219751-1

Mercedes-Benz C-Class W203 Alarm Sensor Module Unit A2038219751

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8606022

BMW F10 F11 523i N53 204HP Engine Control Unit ECU DME 7614366 Automatic

€759.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7L6971121N

Volkswagen Touareg 7L Front Door Wiring Loom Harness Passenger's Side 7L6971121N

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 82G971688F

Audi A1 GB Mk2 Rear Door Wiring Loom Harness Cable Right O/S Side 82G971688F

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8512047-5

BMW E90 E91 LCI N47N 320d ed ECU KIT DDE 8512047 CAS 2 Keys Manual Transmission

€180.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. BJ32-14633-CC

Range Rover L538 Rear Door Wiring Loom Harness Cable Right O/S BJ32-14633-BC

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6865300

BMW F20 F22 F30 F32 F36 Air Module Control Module ICM Plus Unit 6865300

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9345379

BMW X3 F25 Footwell Light Control Module ECU Unit FRM3 TEMIC 9345379

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5QF959659

Seat Ibiza Mk5 Front Hood Bonnet Impact Sensor Unit 5QF959659

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9376789

BMW F39 F45 F48 Mini F60 Positive Battery Wiring Cable 9376789

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2189058500

Mercedes CLS X218 Antenna Amplifier Rear Aerial Control Module A2189058500

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8P0862335F

Audi A3 8P A4 B7 Bluetooth Module Interface Control Unit Hands Free 8P0862335F

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8V5114A175AA

Ford Fiesta Mk7 Fuse Relay Box Control Module 8V51-14A175-AA

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1569009100-1

Mercedes W204 C63 AMG 457HP M156.985 Engine ECU Kit Lock Barrel Keys A1569009100

€854.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9267465

BMW F01 Body Control Module ECU Junction Box V5 PL6 JBBFE III Lear 9267465

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. LR133623

Land Rover Discovery L550 Positive Plus Battery Wiring Cable L8D2-14N170-CB

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1Y0951177

VW Volkswagen New Beetle Alarm Motion Detector Sensor Module Unit 1Y0951177

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. F1ET-13N064-AB

Ford Focus Mk3 Steering Column Stalk Slip Mount Bracket Module F1ET-13N064-AB

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8642682

BMW 3 Series F30 LCI 330e Negative Earth Cable High Voltage Battery 8642682

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5H32-19C164-BA

Land Rover Range Rover Sport L320 Radio Sound Amplifier 5H32-19C164-BA XQK500095

€123.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1729007408

Mercedes SLK R172 Player Radio Audio Navi Head Unit CD A1729007408

€218.95

Free delivery: Sep 14 – 15

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Part no. A2669000300-2

Mercedes W169 W245 M266.920 95HP Engine Control ECU Kit A2669000300 Automatic

€237.95

Free delivery: Sep 14 – 15

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Part no. 4K0915181F

Audi A6 C8 50 TFSIe Hybrid Negative Battery Wiring Terminal Monitor 4K0915181F

€151.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5WB959107A

Skoda Octavia Mk4 Tailgate Control Module Unit ECU 5WB959107A

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0951253-2

Audi VW Volkswagen Seat Relay 643 Unit Module 4 Pins Set X3 8K0951253

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8589145-19

BMW F36 190 HP 420d B47 Engine Control Unit ECU KIT Diesel 8589145 Automatic

€560.95

Free delivery: Sep 14 – 15

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Part no. 1Q0951177A

VW Volkswagen Eos 1F Radar Motion Sensor Control Unit Module 1Q0951177A

€23.95

Free delivery: Sep 14 – 15

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Part no. H1BT-18C847-AA

Ford Fiesta Mk8 Aerial Antenna Amplifier Module H1BT-18C847-AA

€23.95

Free delivery: Sep 14 – 15

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Part no. 8582155-3

BMW F20 F30 F32 120dX 320dX 420dX 184HP N47N Engine ECU 8582155 Automatic

€66.95

Free delivery: Sep 14 – 15

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Part no. A2479002513

Telematic Control Module Mercedes W447 W907 W910 Telematics Unit A2479002513

€113.95

Free delivery: Sep 14 – 15

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Part no. HPLA-70718-SE

Land Rover Range Rover Sport L494 Telematics Control Module ECU HPLA-70718-SE

€85.95

Free delivery: Sep 14 – 15

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Part no. 5293147-4

Relay Glow Littlefuse Mega Fuse 450 A Amp 5293147

€23.95

Free delivery: Sep 14 – 15

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Part no. 2K0971813B

VW Volkswagen Caddy 2k Ultrasound Sensor Alarm Sensor Pearl Grey 2K0971813B

€42.95

Free delivery: Sep 14 – 15

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Part no. 5A088E6

BMW G20 Engine Control Unit ECU 258 HP 330i B48D 5A088E6 Automatic

€284.95

Free delivery: Sep 14 – 15

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Part no. 8576364-1

BMW F30 325d N47S1 218 HP Engine Control Unit ECU Kit DDE 8576364 Key FEM Manual

€503.95

Free delivery: Sep 14 – 15

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Part no. 9289374

BMW X5 X6 F15 F85 F16 F86 Front Battery Fuse Box Positive Distribution Terminal

€23.95

Free delivery: Sep 14 – 15

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Part no. A2048704626

Door Module Mercedes W204 Rear Right O/S Control Unit Module A2048704626

€23.95

Free delivery: Sep 14 – 15

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Part no. 912034H670

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

€28.95

Free delivery: Sep 14 – 15

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Part no. 5F4035225

Seat Leon Mk3 Antenna Amplifier Module AM/FM Left N/S Aerial Booster 5F4035225

€42.95

Free delivery: Sep 14 – 15

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Part no. 4L0910732F

Volkswagen Caddy SB Bluetooth Module Control Unit 4E0035723

€51.95

Free delivery: Sep 14 – 15

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Part no. A2105450703

Mercedes CL203 W210 R170 Wiring Loom Harness Plug Connector A2105450703

€23.95

Free delivery: Sep 14 – 15

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Part no. Q0004764V004000000

Smart C450 Rear Hatch Wiring Harness Door Cable Q0004764V004000000

€56.95

Free delivery: Sep 14 – 15

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Part no. A0009062103

Mercedes W205 Alternator Generator Petrol Engine Valeo 150A 14V A0009062103

€47.95

Free delivery: Sep 14 – 15

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