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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Land Rover Range Rover Velar L560 Alternator Wiring Cable Loom M8A2-14N164-AB

€75.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 95B907159T

Porsche Macan 95B Engine Sound Generator Actuator Module Control Unit 95B907159T

€165.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 9128570

PDC Loom Cables BMW E81 E87N LCI Front Bumper Wiring Set 9128570

€28.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2055408004

Mercedes W205 Alternator Wiring Harness Loom C300h Diesel OM651 A2055408004

€28.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. EL2T-19A391-ACW

Ford Transit Custom Mk8 Bluetooth Microphone Unit Module EL2T-19A391-ACW

€42.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. CV11-12A650-CE

Ford B-MAX 1.5 TDCI 75HP UGJC Diesel Engine Control ECU 8V2112A650KE Manual

€379.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. CPLA-14D617-AC

Range Rover L405 Front Door Control Unit Module Passenger Side CPLA-14D617-AC

€37.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8X0971693

Audi A1 8X Door Wiring Harness Loom Rear Left Right N/O/S Cabling 8X0971693

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2056100534

Mercedes W205 Battery Support Protection Bracket Tray A2056100534

€23.95

Free delivery: Sep 10 – 14

If paid before 14:00

Part no. 8Y0035042C

Audi S3 8Y Body Control Comfort Module ECU Unit Bluetooth 8Y0035042C

€1,139.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 9225619

BMW F10 Electronic Front Seat Memory Module Control Unit ECU 9225619

€70.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2048701826

Mercedes S204 Door Module Front Left N/S Control Unit ECU A2048701826

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 431951253D

Audi TT 8N Relay Unit Module 431951253D

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. DT1T-14B321-AF

Ford Transit Connect Mk2 II Air Module Control Unit ECU DT1T-14B321-AF

€170.95

Free delivery: Sep 11 – 14

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Part no. 9154349

BMW MINI Clubman R55 Cable Wiring Loom Splitdoor Split Door Rear Left N/S

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 283930431R

Roof Microphone Mercedes Citan W415 Interior Mic Unit Wiring Cable 283930431R

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 04E907309AC-2

Audi A1 8X 1.4 TFSI CZCA 125HP Engine Control ECU Kit 04E907309AC Manual

€180.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8606306-6

BMW F30 320i N20 184HP ECU Kit Engine Control Unit DME 8606306 Key FEM Automatic

€569.95

Free delivery: Sep 11 – 14

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Part no. 4H0959107AC

Audi A8 4D Tailgate Lift Boot Lid Control Unit Module Trunk 4H0959107AC

€32.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8W8971035AD

Audi A5 S5 F5 Door Trim Panel Harness Wiring Wire Front Driver Side 8W8971035AD

€80.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 1036060061

Range Rover Evoque L538 Xenon Headlight Control Module Ballast 1036060061

€28.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8651049

Mini Countryman F60 Battery Ground Earth Mass Cable 8651049

€47.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2229003619

Mercedes W205 W213 W222 Radio Sat Nav Head Unit A2229003619

€522.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A1665459340

Mercedes W166 C292 Fuse Box Relay Control Unit Module A1665459340

€32.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. ZR1328B

BMW X3 E83 PCT Automotive Towing Hitch Towbar Tow Bar Trailer Relay Unit ZR1328B

€94.95

Free delivery: Sep 11 – 14

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Part no. A2059000227

Mercedes C205 Vehicle Dynamics Suspension Control Module ECU A2059000227

€132.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5A2AA07

BMW U06 Active Tourer Cable Harness Battery Positive Wiring Lead Cable 5A2AA07

€51.95

Free delivery: Sep 11 – 14

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Part no. NNW502434

Land Rover Discovery 3 L319 Air Module Control Unit ECU NNW502434

€23.95

Free delivery: Sep 11 – 14

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Part no. A9068270005

Mercedes W639 W906 Voltage Stabilizer Control Unit Module A9068270005

€23.95

Free delivery: Sep 11 – 14

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Part no. FV6T-14324-BBB

Ford Transit Connect Mk2 Starter Earth Ground Wire Cable FV6T14324BBB

€32.95

Free delivery: Sep 11 – 14

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Part no. 4H0906093C

Audi Q7 4L A8 D4 Fuel Pump Control Unit Module ECU Diesel 4H0906093C

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 4F0937503

Audi A6 C6 R8 42 Dashboard Fuse Box Electrical Relay Unit 4F0937503

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 03L906018AJ-2

Audi A3 8P 2.0 TDI 170HP CFGB Engine Control Unit ECU 03L906018AJ Manual

€94.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2044406135

Mercedes W204 Door Harness Loom Cable Wiring Rear Right O/S A2044406135

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. KG9T-14D068-NA

Ford Mondeo Mk5 Fuse Box Control Unit Module KG9T-14D068-NA

€118.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. LR024097

Land Rover Discovery 4 L319 Key Fob Remote Control LR024097

€47.95

Free delivery: Sep 11 – 14

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Part no. 5BA33A3

Mini F66 Telematics Bluetooth Module Control Unit 5BA33A3

€161.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. C1BG-12A650-AE

Ford Fiesta Mk7 1.25 Duratec SNJA 82HP Engine Control ECU C1BG-12A650-AE Manual

€37.95

Free delivery: Sep 11 – 14

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Part no. 1K0971557AB

VW Golf Mk5 Front Door Wiring Loom Harness Cable Driver Side O/S 1K0971557AB

€47.95

Free delivery: Sep 11 – 14

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Part no. A2055401516

Mercedes W205 Battery Cable Negative Lead Wiring Harness Control A2055401516

€28.95

Free delivery: Sep 11 – 14

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Part no. NV4T14G229FA

Ford Puma ST CF7 Bluetooth Connection Module Control Unit NV4T-14G229-FA

€175.95

Free delivery: Sep 11 – 14

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Part no. A0019820823

Mercedes Sprinter W907 4-Pin Relay V23074-H1605-X123 A0019820823

€23.95

Free delivery: Sep 11 – 14

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Part no. 03E971815A

Volkswagen Polo 6R Cover Wiring Loom Guide Bracket Trim 03E971815A

€23.95

Free delivery: Sep 11 – 14

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Part no. 5M0971693M

Volkswagen Golf Plus Door Loom Wiring Harness Cable Rear Left N/S 5M0971693M

€32.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. YQH500130

Land Rover Discovery 3 L319 Engine Compartment Fuse Panel Cover Lid YQH500130

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 9354226

BMW X5 F15 F20 F21 F23 F30 F31 Rain Light Solar Sensor Windscreen 9354226

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. LR007373

Land Rover EVOQUE L538 2.2 TDCI Diesel Engine Starter Motor LR007373

€51.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2214407910

Mercedes W221 Rear Door Wiring Loom Harness Cable Left Right N/O/S A2214407910

€28.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5A4A9D6

BMW G20 Front Door Wiring Harness Cable Driver Side 5A4A9D6

€37.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 0148459-BRG

Mini Cooper One R50 Fuel Filler Cover Flap British Racing Green A67 0148459

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8E0035456C

Audi A4 B7 Telephone Aerial Antenna Signal Amplifier Module 8E0035456C

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 9159311

BMW 5 Series F10 F11 Mini R55 R56 R57 Door Sensor Airbag 9159311

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 6946073

BMW E46 Battery Cable Positive Plus Lead Wire 6946073

€113.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 3C0937125-1

VW Passat B6 Sharan 7N Fuse Box Relay Electrical Module Unit 3C0937125

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 04E907309AC-1

Audi A1 8X 1.4 TFSI CZCA 125HP Engine ECU Kit BCM Lock + Key 04E907309AC Manual

€161.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. LK62-12B684-KAA

Range Rover L494 Engine ECU Control 3.0 Diesel Hybrid Automatic LK62-12B684-KAA

€807.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A1669005417

Mercedes X117 Communication Telematics Control Module Unit ECU A1669005417

€28.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8W0971030CH

Audi A4 B9 Front Door Wiring Loom Harness Passenger Side 8W0971030CH

€51.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2389009000

Air Module Mercedes A205 A238 A217 SRS Protection Control Unit A2389009000

€99.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8586573

BMW F20 F30 LCI Wiring Harness Engine Gearbox Module 120dX 320dX B47 8586573

€156.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 6G9T-14A631-BF

Ford Mondeo Mk4 Rear Door Wiring Loom Harness Cable Left N/S 6G9T-14A631-BF

€28.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2709000900-10

Mercedes W176 A 180 270.910 122HP Blue Efficiency ECU Kit A2709000900 Automatic

€379.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 9436289

BMW G20 G21 Rear Door Wiring Loom Cable Control Unit Left Right N/O/S 8718245

€32.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5Q0803219C-1

Battery Clamp Golf R Mk7 Audi A3 S3 8V Battery Base Bracket Holder 5Q0803219C

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 1K2971615A

Audi A3 8P Engine Bay Wiring Holder Harness Loom Cable Guide Bracket 1K2971615A

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5B93615

Mini F66 B48P 231HP Engine Control Unit DME Kit 5B93615 Automatic

€284.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 7802929

BMW 5 7 E60 E61 E65 M57N M57N2 Compact Alternator Generator VALEO 170A 7802929

€161.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 7L0971225

Audi Q7 4L 4.2 TDI Quattro Positive HV Battery Terminal Cable Harness 7L0971225

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 070906016B

Volkswagen Phaeton 3D 5.0 V10 AJS 313HP Engine Control ECU 070906016B Automatic

€85.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 4M5T-18C815-BK

Ford Focus St-2 Mk2 Sony MP3 CD Player Radio Head Unit 4M5T-18C815-BK

€56.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5A7E4D1

BMW F40 F44 Gran Coupé G20 Front Windscreen KaFas Camera 5A7E4D1

€94.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 038907281D-1

Genuine VW Audi Seat Skoda Diesel Glow Plug Relay Unit Black 038907281D

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5M0971694M

Volkswagen Golf Plus Door Loom Wiring Harness Cable Rear Right O/S 5M0971694M

€32.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 6798872-1

BMW F10 F11 F30 F31 Wheel Module Tire Pressure Control RDC 433MHZ Unit 6798872

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 4H0951223

Audi A6 C7 Single Horn Alarm Siren High Tone Control Unit Module 4H0951223

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. CK52-F260145-CC

Land Rover Range Rover L405 Negative Earth Battery Cable Lead CK52-F260145-CC

€37.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. HK72-18C847-CA

Land Rover Discovery Sport L550 Aerial Antenna Amplifier Unit HK72-18C847-CA

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A0009000646

Mercedes C118 C167 W177 W247 Parktronic Parking Control Unit Module A0009000646

€284.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A0008200806

Mercedes Vito W639 Rear Air Conditioning Wiring Harness Loom A0008200806

€56.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 06M907309D-4

Audi S5 F5 3.0 TFSI 354HP CWGD Quattro Engine ECU Kit BCM + 2 Key 06M907309D

€455.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2048701226

Mercedes S204 Door Module Rear Right O/S Control Unit ECU A2048701226

€32.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8F0972814

Audi A5 8F Cabriolet Hydraulic Roof Pump Motor Wiring Harness Loom 8F0972814

€47.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. LR105985

Land Rover Discovery Sport L550 Alternator 14V 230 Amp 2.0 Diesel GX7310300DF

€61.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 4K5971687BA

Audi A6 C8 Door Wiring Cable Harness Loom Rear Left Right N/O/S 4K5971687BA

€28.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A6401500734-2

Mercedes W169 W245 OM640.941 140HP Engine Control ECU Kit A6401500734 Automatic

€189.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 6868724

BMW X5 F15 F85 X6 F16 F86 ICM Control Unit ACC Support V-5.7 6868724

€332.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A2125403100

Mercedes W212 Rear Parking Sensor PDC Wiring Harness Loom A2125403100

€42.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 7560377

Cable Alternator BMW E81 E82 E87 E88 E90 E91 LCI Starter B+ 7560377

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5A7A0B5

BMW F70 F74 X1 U11 X2 U10 Engine Wiring Loom Harness Cable B38 Petrol 5A7A0B5

€146.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 6851242

ICM Module BMW F01 F02 Integrated Chassis Management QL ES Control Unit 6851242

€28.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 7634059

BMW F30 F31 F32 N20 Engine Gearbox Module Wiring Cable Loom Harness 7634059

€32.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 6F0971199

Seat Ibiza Mk5 Fr Door Wire Wiring Harness Loom Cable Front Left N/S 6F0971199

€47.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A0045450201-1

Mercedes Sprinter W906 Fuse Prefuse Box Relay Electrical Unit A0045450201

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 5Q4959593K

Seat Ateca Door Module Control Unit Front Driver's Side Door 5Q4959593K

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. A4515400906

Smart Fortwo C451 Front Door Wiring Harness Cable Driver Side O/S A5415400906

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

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Vauxhall Movano C Lambda Oxygen Sensor 2.2 BlueHDI 46356034

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Part no. 9391253

BMW F10 F11 Wiring Cable Loom 9391253 9391252

€23.95

Free delivery: Sep 11 – 14

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Part no. HY32-14A597-BA

Land Rover Range Rover Velar L560 Sun Light Sensor HY32-14A597-BA

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

Part no. 8621016-1

BMW G20 G30 Accumulator Battery Negative Ground Cable Wiring Plug 8621016

€23.95

Free delivery: Sep 11 – 14

If paid before 14:00

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