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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Ford Fiesta Mk7 Battery Box Tray Housing Holder Bracket 8V21-10718-AD

€23.95

Free delivery: Nov 12 – 13

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Part no. JK2T-14B446-ABE

Ford Transit Custom Front Bumper Wiring Loom Harness Alarm Cable JK2T-14B446-ABE

€37.95

Free delivery: Nov 12 – 13

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Part no. A2048204639-3

Mercedes W204 Headlight Lamp Light Front Right O/S Wire Harness Loom A2048204639

€23.95

Free delivery: Nov 12 – 13

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Part no. AH22-14D617-AD

Range Rover Sport L320 Front Door Control Module Passenger Side AH22-14D617-AD

€32.95

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Part no. 7644251

Mini Cooper One R55 R56 R57 R60 Battery Mounting Bracket Clamp Bolt Holder

€23.95

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Part no. EB3P-12B565-AB

Ford Ranger Lim 2.2 Diesel AutomaticGearbox ECU Control Unit EB3P-12B565-AB

€104.95

Free delivery: Nov 12 – 13

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Mercedes W221 Air Suspension Module Regulation Control Unit A2219005503

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1175402309

Mercedes CLA C117 X117 Roof Electrical Wiring Harness Cable Loom A1175402309

€32.95

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Part no. 9215951

BMW 6 Series E63 E64 Negative Battery Cable Minus Pole IBS Control Unit 9215951

€42.95

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Part no. AH42-14D392-AB

Land Rover Discovery 4 L319 Air Suspension Module Control Unit AH42-14D392-AB

€23.95

Free delivery: Nov 12 – 13

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Part no. BS7T-14K131-B

Land Rover Freelander 2 L359 Fuse Relay Box BS7T-14K131-B

€23.95

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Part no. 03L903024M

Volkswagen Tiguan 5N Golf Mk5 Alternator Generator Diesel Power 03L903024M

€32.95

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Part no. BJ32-14A076-CA

Range Rover Evoque L538 Fuse Box Relay Lid Cover BJ32-14A076-CA

€23.95

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Part no. 9W83-15K866-BB

Jaguar XF X250 Parking Assist Control Module ECU 3.0 Diesel 9W83-15K866-BB

€23.95

Free delivery: Nov 12 – 13

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Ford Transit Connect Mk2 Transit Custom Radar Sensor Module ECU JX7T-9G768-AD

€66.95

Free delivery: Nov 12 – 13

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BMW F10 F11 F12 F13 Tweeter Speaker Bang&Olufsen Rear Left Right N/O/S 9224868

€37.95

Free delivery: Nov 12 – 13

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Part no. A2229004213

Keyless Module Mercedes W205 W213 C253 ECU Door Lock Control Unit A2229004213

€23.95

Free delivery: Nov 12 – 13

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Part no. 7301271-2

BMW X5 F15 F85 Rear Trunk Lid Boot Tailgate Lamp Light Wiring Left N/S 7301271

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5H0945308A-2

Volkswagen Golf Mk8 CD1 Tail Light Lamp Wiring Inner Rear Right O/S 5H0945308A

€23.95

Free delivery: Nov 12 – 13

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Part no. 8581551

BMW F39 F40 F44 F45 F48 Diesel Engine Wiring Loom Harness Cable 8581551

€156.95

Free delivery: Nov 12 – 13

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Part no. 8W0906121B

Audi A4 B9 A5 F5 2.0 TDI Engine Fuel Pump Control Unit Module 8W0906121B

€23.95

Free delivery: Nov 12 – 13

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Part no. 2622341

BMW 2 3 5 Series F10 F22 F30 F32 Antenna Amplifier Module Trap Circuit 2622341

€23.95

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Part no. A0009059300-KB

Mercedes W205 W212 W246 Parking Distance Sensor Parktronic Black 191 A0009059300

€23.95

Free delivery: Nov 12 – 13

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Part no. 5J6971161AQ

Skoda Fabia Mk2 Rear Door Wiring Loom Harness Left N/S 5J6971161AQ

€37.95

Free delivery: Nov 12 – 13

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Part no. A2125407605

Door Wiring Mercedes W212 Loom Cable Rear Left Right N/O/S A2125407605

€23.95

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BMW X3 F25 EPS Control Wiring Harness Loom Cable 9243626

€75.95

Free delivery: Nov 12 – 13

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Audi A4 B8 A5 8T Engine Starter Motor Actuator Unit Petrol 06D911021B

€23.95

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BMW F45 F48 F49 Mini Countryman F60 Ground Earth Cable Adapter Mass 9437208

€23.95

Free delivery: Nov 12 – 13

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BMW F30 Fuse Box Front Body Control Module ECU BCM Unit 8781423

€237.95

Free delivery: Nov 12 – 13

If paid before 14:00

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BMW 1 Series F20 F21 Antenna Aerial Noise Suppression Filter 9226888

€23.95

Free delivery: Nov 12 – 13

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Part no. 6940778

BMW E65 E66 Front Seat Wiring Loom Harness Right O/S 6940778

€23.95

Free delivery: Nov 12 – 13

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Part no. A0055461340

Mercedes W447 Energy Distributor Plug Module A0055461340

€23.95

Free delivery: Nov 12 – 13

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Part no. BG9T-14240-GFC

Ford Mondeo Mk4 Rear Door Wiring Loom Harness Cable Left N/S BG9T-14240-GFC

€28.95

Free delivery: Nov 12 – 13

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Part no. A2059006651

Mercedes C205 GLC C253 Body Control Comfort Module Unit SAM BCM A2059006651

€398.95

Free delivery: Nov 12 – 13

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Part no. A2215407307

Mercedes W221 Rear Door Wiring Loom Harness Cable Left N/S A2215407307

€23.95

Free delivery: Nov 12 – 13

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Part no. 3426159

BMW X3 E83 2.5i 3.0i M54 Wiring Loom Harness Engine Automatic Gearbox 3426159

€47.95

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Part no. 04L907445E

Audi Q2 GA 1.6 TDI DDYA 115HP Engine Module Unit ECU Kit 04L907445E Manual

€332.95

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Part no. 5Q0907361A

Volkswagen Golf Mk7 Leon Mk3 Fuse Relay Box Lid Cover 5Q0907361A

€23.95

Free delivery: Nov 12 – 13

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Part no. 6812252

BMW X1 F48 Door Wiring Loom Harness Cable Rear Left Right N/O/S 6812252

€28.95

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Part no. 4M0906093L

Audi Q7 4M 3.0 TDI Fuel Pump Control Unit Module ECU 4M0906093L

€23.95

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Part no. M8A2-14N164-AB

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

€75.95

Free delivery: Nov 12 – 13

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

€165.95

Free delivery: Nov 12 – 13

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Part no. 9128570

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

€23.95

Free delivery: Nov 12 – 13

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Part no. A2055408004

Mercedes W205 Alternator Wiring Harness Loom C300h Diesel OM651 A2055408004

€28.95

Free delivery: Nov 12 – 13

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Part no. EL2T-19A391-ACW

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

€42.95

Free delivery: Nov 12 – 13

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Part no. 3D0951253A

VW Volkswagen Audi Seat Skoda Relay Black 5 Pins 12V 50A Set 433 3D0951253A

€23.95

Free delivery: Nov 12 – 13

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Part no. 95B907530F

Porsche Macan 95B Gateway Control Unit Module ECU 95B907530F

€56.95

Free delivery: Nov 12 – 13

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Part no. CV11-12A650-CE

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

€379.95

Free delivery: Nov 12 – 13

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Part no. CPLA-14D617-AC

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

€37.95

Free delivery: Nov 12 – 13

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Part no. 03L906018PN

Volkswagen New Beetle Engine Control Unit ECU 140HP 2.0 CFFB Manual 03L906018PN

€189.95

Free delivery: Nov 12 – 13

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Part no. A2469053903

Mercedes CLA C117 X117 Key Reader Ignition Switch Lock Control Unit A2469053903

€127.95

Free delivery: Nov 12 – 13

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Part no. 8X0971693

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

€23.95

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Mercedes W205 Battery Support Protection Bracket Tray A2056100534

€23.95

Free delivery: Nov 10 – 13

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Jaguar XF X250 Defrost Servo Motor Unit Module Control Panel 8X23-19E616-CB

€32.95

Free delivery: Nov 12 – 13

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Part no. 8Y0035042C

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

€1,139.95

Free delivery: Nov 12 – 13

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BMW F10 Electronic Front Seat Memory Module Control Unit ECU 9225619

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2048701826

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

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 431951253D

Audi TT 8N Relay Unit Module 431951253D

€23.95

Free delivery: Nov 12 – 13

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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: Nov 12 – 13

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Part no. 283930431R

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

€23.95

Free delivery: Nov 12 – 13

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Part no. 04E907309AC-2

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

€180.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

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Part no. 4H0959107AC

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

€32.95

Free delivery: Nov 12 – 13

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Part no. 8W8971035AD

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

€80.95

Free delivery: Nov 12 – 13

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Part no. 1036060061

Range Rover Evoque L538 Xenon Headlight Control Module Ballast 1036060061

€28.95

Free delivery: Nov 12 – 13

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Mini Countryman F60 Battery Ground Earth Mass Cable 8651049

€47.95

Free delivery: Nov 12 – 13

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Part no. A2229003619

Mercedes W205 W213 W222 Radio Sat Nav Head Unit A2229003619

€522.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1665459340

Mercedes W166 C292 Fuse Box Relay Control Unit Module A1665459340

€32.95

Free delivery: Nov 12 – 13

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

€94.95

Free delivery: Nov 12 – 13

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Mercedes C205 Vehicle Dynamics Suspension Control Module ECU A2059000227

€132.95

Free delivery: Nov 12 – 13

If paid before 14:00

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

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

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Land Rover Discovery 3 L319 Air Module Control Unit ECU NNW502434

€23.95

Free delivery: Nov 12 – 13

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Part no. A9068270005

Mercedes W639 W906 Voltage Stabilizer Control Unit Module A9068270005

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. FV6T-14324-BBB

Ford Transit Connect Mk2 Starter Earth Ground Wire Cable FV6T14324BBB

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F0937503

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

€23.95

Free delivery: Nov 12 – 13

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Part no. A2044406135

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

€23.95

Free delivery: Nov 12 – 13

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Part no. KG9T-14D068-NA

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

€118.95

Free delivery: Nov 12 – 13

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Land Rover Discovery 4 L319 Key Fob Remote Control LR024097

€47.95

Free delivery: Nov 12 – 13

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Part no. 5BA33A3

Mini F66 Telematics Bluetooth Module Control Unit 5BA33A3

€161.95

Free delivery: Nov 12 – 13

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: Nov 12 – 13

If paid before 14:00

Part no. 1K0971557AB

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

€47.95

Free delivery: Nov 12 – 13

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Part no. A2055401516

Mercedes W205 Battery Cable Negative Lead Wiring Harness Control A2055401516

€28.95

Free delivery: Nov 12 – 13

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Part no. NV4T14G229FA

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

€175.95

Free delivery: Nov 12 – 13

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

€23.95

Free delivery: Nov 12 – 13

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€23.95

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€66.95

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€23.95

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€61.95

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€23.95

Free delivery: Nov 12 – 13

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Land Rover EVOQUE L538 2.2 TDCI Diesel Engine Starter Motor LR007373

€47.95

Free delivery: Nov 12 – 13

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VW Caddy 2K Body Control Comfort Unit Module Convenience Unit 1K0959433CP

€23.95

Free delivery: Nov 12 – 13

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Audi A4 B7 Engine Injectors Wiring Harness Cable 2.0 TFSI 06D971627B

€51.95

Free delivery: Nov 12 – 13

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Part no. A2214407910

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

€28.95

Free delivery: Nov 12 – 13

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Part no. 5A4A9D6

BMW G20 Front Door Wiring Harness Cable Driver Side 5A4A9D6

€37.95

Free delivery: Nov 12 – 13

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Part no. 0148459-BRG

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

€23.95

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Audi A4 B7 Telephone Aerial Antenna Signal Amplifier Module 8E0035456C

€23.95

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

€23.95

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BMW E46 Battery Cable Positive Plus Lead Wire 6946073

€113.95

Free delivery: Nov 12 – 13

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

€23.95

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