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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Toyota Yaris P9 Music Radio CD Player Head Unit 86120-0D490

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Free delivery: Nov 12 – 13

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Smart W452 Wiring Harness Side Door Cable Harness 0015078V002

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Free delivery: Nov 10 – 13

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Jaguar XF X250 Front Side Door Control Module ECU Right O/S BH42-14D618-AA

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Toyota Avensis T270 Corolla E12 Verso R2 Auris Relay Bosch 4 Pin 9008087019 Set

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BMW F70 F74 48V Battery Tray Clamping Mount Holder Bracket 9855632

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€23.95

Free delivery: Nov 12 – 13

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Mercedes W907 Starter Wiring Battery Alternator Cable Harness Loom A9075401305

€32.95

Free delivery: Nov 12 – 13

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Part no. C1BT-14B321-CD

Ford Fiesta Mk7 Air Unit SRS Restraint System Control Module C1BT-14B321-CD

€32.95

Free delivery: Nov 12 – 13

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Part no. 8K0959663C

Audi A8L 4H Voltage Converter Stabilizer Control Module Unit ECU 8K0959663C

€23.95

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BMW X1 U11 F74 Gran Coupé Fuel Pressure Sensor Control Unit 220i B38 81CP103

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Free delivery: Nov 12 – 13

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Part no. 1K8971104F

Volkswagen Scirocco Mk3 Rear PDC Parking Sensor Wiring Harness Loom 1K8971104F

€37.95

Free delivery: Nov 12 – 13

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Part no. A2055400972

Mercedes C205 iDrive System Wiring Loom Harness Cable Unit A2055400972

€28.95

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Land Rover Discovery 4 L319 Battery Positive Wiring 3.0 Diesel EH22-14310-KE

€56.95

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Mercedes C219 320 CDI 224HP OM642.920 Engine Unit ECU Kit A6421507991 Automatic

€275.95

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Ford Transit Mk8 Bluetooth Multimedia Control Module Unit ECU EK2T-14B428-NA

€42.95

Free delivery: Nov 12 – 13

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Range Rover Sport L322 Key Fob Door Opener Button CH22-15K801-BB

€23.95

Free delivery: Nov 12 – 13

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Part no. HK62-14B673-BA

Range Rover Sport L494 Boot Lid Tailgate Power Control Module HK62-14B673-BA

€23.95

Free delivery: Nov 12 – 13

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Part no. 4G0907566J

Audi A7 4G Sportback Lane Change Assist Control Module Rear Left N/S 4G0907566J

€108.95

Free delivery: Nov 12 – 13

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Part no. 8582280-1

BMW F20 F21 116d N47N 116HP Engine Control ECU Kit DDE 8582280 Manual

€303.95

Free delivery: Nov 12 – 13

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Mercedes W212 Front Axle Suspension Wishbone Ball Joint Mount A2123300135

€23.95

Free delivery: Nov 12 – 13

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Part no. A0555452928

Mercedes W204 C207 C209 W212 W222 Engine Wiring Loom Harness Cable A0555452928

€23.95

Free delivery: Nov 12 – 13

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Part no. 4H0937529

Volkswagen Passat B7 Golf Mk6 Relay Repair Plug Wiring Connector Loom 4H0937529

€23.95

Free delivery: Nov 12 – 13

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Part no. 4H0907101H

Audi A8 D4 Fuse Box Relay Mounting Board Holder 4H0907101H

€23.95

Free delivery: Nov 12 – 13

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Part no. 5J0959631A

Skoda Fabia 5J Lateral Acceleration Air Module Adaptor Relay 12V 5J0959631A

€23.95

Free delivery: Nov 12 – 13

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Part no. DN1T-15K600-CE

Ford Fiesta Mk7 Body Control Module BCM Unit Central Locking DN1T-15K600-CE

€23.95

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BMW E87 E90 E91 LCI Rear PDC Ultrasonic Parking Sensor SET X2 Barberarot - A39

€28.95

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VW Volkswagen Passat B7 Convenience Body Control Module Unit ECU 3AA959433E

€23.95

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Ford Fiesta Mk7 Fuel Injector Wiring Loom Harness Cable Connector JX7T-9F666-AC

€42.95

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BMW X6 E71 Washer Reservoir Wiring Harness Cable Loom 9133131

€28.95

Free delivery: Nov 12 – 13

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Part no. 6958526-1

BMW 5 X5 X6 Series 1 E60 E61 E70 E71 F10 F11 Seat Adjustment Switch Right O/S

€23.95

Free delivery: Nov 12 – 13

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Fan Wiring Mercedes W204 W211 Heater Blower Unit Motor Cable Harness A2114404705

€51.95

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Porsche Cayenne 955 Telematics Bluetooth Telephone Module Unit 95504490277

€56.95

Free delivery: Nov 12 – 13

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Part no. 2077261

Ford Fiesta Mk8 Alternator Generator 120A 14V Petrol H1BT-10300-EC

€28.95

Free delivery: Nov 12 – 13

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Part no. 1J6035111-1

VW Volkswagen Touareg 7L Golf Mk4 CD Changer Radio Unit 1J6035111

€23.95

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Volkswagen Polo 9N Rear Door Speaker Wire Harness Left Right N/O/S 6Q4971161A

€23.95

Free delivery: Nov 12 – 13

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Part no. A2118704026

Mercedes W211 Door Module Rear Left N/S Control Unit ECU A2118704026

€23.95

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Door Wiring Plug Mercedes W176 W246 Cable Lead Connector A1769980001

€23.95

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Mercedes W166 Front Seat Headrest Wiring Cable Harness A1665404802

€23.95

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Part no. 3Q0907338G

Audi VW Seat Skoda Headlight Aim Range Control Unit Module ECU Xenon 3Q0907338G

€23.95

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Part no. AH42-15K603-AA

Range Rover L405 Aerial Antenna Control Unit Keyless Entry AH42-15K603-AA

€23.95

Free delivery: Nov 12 – 13

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Part no. 3R0971095

Seat Exeo 3R Front Bumper Wiring Loom Harness Cable 3R0971095

€42.95

Free delivery: Nov 12 – 13

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Part no. 8W0035454

Audi A4 B9 Front Centre Dashboard Tweeter Speaker 8W0035454

€23.95

Free delivery: Nov 12 – 13

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Part no. 03C906014FB

Seat Ibiza 6J Engine Control ECU 86HP 1.4 Petrol CGGB Manual 03C906014FB Set

€23.95

Free delivery: Nov 12 – 13

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Part no. 9317866

BMW 3 Series F30 330e Hybrid Battery Accumulator Bracket Holder Mount 9317866

€23.95

Free delivery: Nov 12 – 13

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Part no. 6928658

BMW E87 LCI Front Door Wiring Loom Drivers Side 6928658

€23.95

Free delivery: Nov 12 – 13

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Part no. 5E2857367B

Skoda Octavia Mk3 5E AUX USB Socket Port Console Panel Trim Cover 5E2857367B

€23.95

Free delivery: Nov 12 – 13

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Part no. 7E0937090B

Volkswagen Transporter T6 BCM Body Control Module 433MHZ ECU 2.0 TDI 7E0937090B

€270.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1175402605

Mercedes C117 Rear Door Wiring Loom Harness Cable Left N/S A1175402605

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9389286

Door Wiring Mini Clubman F54 Front Passanger Side N/S Door Harness 9389286

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6M21-13404-FG-2

Ford Galaxy Mk3 Tail Light Lamp Right O/S Cable Wire Harness Loom 6M21-13404-FG

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6932399

BMW X5 E53 Cable Loom Plug Socket Connector Wiring Harness 6932399 6932396

€23.95

Free delivery: Nov 12 – 13

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Part no. 7CA971691

VW Volkswagen Crafter Sy Sliding Door Wiring Harness Cable Left N/S 7CA971691

€23.95

Free delivery: Nov 12 – 13

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Part no. 8642705

Mini Cooper F56 B38 136HP Engine Control ECU DME 8642705 Automatic

€227.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 82A945092C-2

Audi A1 GB Sportback Rear Tail Light Wiring Cable Outer Right O/S 82A945092C

€23.95

Free delivery: Nov 12 – 13

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Part no. 8X0971029D

Audi A1 8X Door Loom Wiring Harness Cable Front Driver Side O/S 8X0971029D

€23.95

Free delivery: Nov 12 – 13

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Part no. 9123739

BMW 1 3 5 7 Series E81 E87 E90 E91 E92 F01 USB USB Hub Audio Interface Module

€23.95

Free delivery: Nov 12 – 13

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Part no. A2478207502

Mercedes C118 W177 W243 W247 Centre Console Dual USB-C Socket Ports A2478207502

€32.95

Free delivery: Nov 12 – 13

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Part no. UM4766960

Ford Ranger Mk4 Door Interior Speaker Loudspeaker UM4766960

€23.95

Free delivery: Nov 12 – 13

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Part no. 6991401

BMW G20 330e Hybrid Jump Start Positive Terminal 6991401

€23.95

Free delivery: Nov 12 – 13

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Part no. 5N0035342E

VW Volkswagen Polo 6R Multimedia Electronic Control Interface Module 5N0035342E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0959655AD

Audi A5 F5 Air Module Control Unit ECU 8W0959655AD

€113.95

Free delivery: Nov 12 – 13

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Part no. 5Q0959107M

Volkswagen Tiguan Mk2 Electric Boot Lid Tailgate Control Unit Module 5Q0959107M

€137.95

Free delivery: Nov 12 – 13

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Part no. F1FT-10C679-CB-1

Ford Transit Connect Mk2 Battery Negative Earth Lead Cable F1FT-10C679-CB

€23.95

Free delivery: Nov 12 – 13

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€23.95

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Part no. 7H0971158L-1

Volkswagen Transporter T5 Battery Cable Positive Wiring 7H0971158J

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

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BMW F32 420iX Petrol N20 184HP Engine Module ECU Kit DME 8617551 Automatic

€379.95

Free delivery: Nov 12 – 13

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Engine Wiring BMW F45 Mini F60 B38 Loom Harness Injection Valve Ignition 8634244

€28.95

Free delivery: Nov 12 – 13

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Part no. YQE500370

Range Rover L322 Rear Interior Fuse Box Unit Module 3.6 Diesel 368DT YQE500370

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9287439

BMW F21 Front Door Harness Wire Loom Electric Cable Passenger Side 9287439

€85.95

Free delivery: Nov 12 – 13

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Part no. 5WA919275C-DGR

Audi S3 8Y PDC Parking Distance Sensor Daytona Grey Metallic - Z7S 5WA919275C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. FPLA-9G768-AC

Range Rover Sport L494 Adaptive Cruise Control Sensor Unit ECU FPLA-9G768-AC

€184.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8J0907361

Audi TT 8J Central Electric System Fuse Box Housing Bracket Retainer 8J0907361

€23.95

Free delivery: Nov 12 – 13

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Part no. 982971036A

Porsche Boxster Cayman 982 Door Wiring Harness Passenger Side 982971036A

€56.95

Free delivery: Nov 12 – 13

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Smart Fortwo C451 Yaw Rate Lateral Acceleration Sensor Unit A4515420718

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6429007401-1

Mercedes W213 350D OM642.873 Diesel Engine Unit ECU A6429007401 Automatic

€75.95

Free delivery: Nov 12 – 13

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Part no. 7L5919275B-ICS

Audi TT 8J Rear Parking Sensor Module Unit PDC Ice Silver X7W 7L5919275B

€23.95

Free delivery: Nov 12 – 13

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Part no. 03L907309-3

Volkswagen Passat B6 2.0 TDI CBDC 110HP Engine Unit ECU Manual 03L907309

€47.95

Free delivery: Nov 12 – 13

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Part no. 059907309L-1

Audi A6 C8 A7 4K 3.0TDI Quattro CCVB 286HP Engine ECU Kit 059907309L Automatic

€408.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. DV6T-14A076-AB

Ford Transit Connect Mk2 Fuse Box Cover Lid Trim DV6T-14A076-AB

€42.95

Free delivery: Nov 12 – 13

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Part no. A1664401606

Mercedes W166 Rear Door Wiring Harness Cable Loom Left Right N/O/S A1664401606

€23.95

Free delivery: Nov 12 – 13

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Volkswagen Tiguan 5N Audi Q3 8U Keyless Antenna Amplifier Unit 5K0962131

€23.95

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BMW Mini Cooper R55 R56 R57 Passenger's Door Module Cables N/S 9142400

€23.95

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Part no. 8E0971085A

Audi A4 B7 Rear Bumper PDC Parking Sensor Wiring Harness Loom 8E0971085A

€23.95

Free delivery: Nov 12 – 13

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Part no. 6M21-13405-FG-2

Ford Galaxy Mk2 Outer Tail Light Lamp Rear Left N/S Harness Loom 6M21-13405-FG

€23.95

Free delivery: Nov 12 – 13

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Part no. 5F0945307K-2

Seat Leon Mk3 Cupra Rear Tail Light Lamp LED Wiring Inner Left N/S 5F0945307K

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

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Ford Fiesta Mk5 Fuse Box Power Distribution Junction Relay 2S6T-14A073-BC

€23.95

Free delivery: Nov 12 – 13

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Part no. 7P5971384J

Porsche Cayenne 92A Seat Backrest Wiring Loom Cable Left Right N/O/S 7P5971384J

€42.95

Free delivery: Nov 12 – 13

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Part no. A1729007313

Mercedes SLC R172 PDC Parking Sensor Module Unit ECU A1729007313

€75.95

Free delivery: Nov 12 – 13

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Part no. DT1113C148AD

Ford Transit Connect Mk2 Headlight Module Control Unit ECU DT11-13C148-AD

€61.95

Free delivery: Nov 12 – 13

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Audi A3 8V Q3 F3 VW Golf M7 Antenna Control Module Keyless Entry Line 5Q0962131

€23.95

Free delivery: Nov 12 – 13

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Mercedes W204 Display Screen Information Navigation Dashboard A2049007408

€66.95

Free delivery: Nov 12 – 13

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Part no. A2514402409

Mercedes W251 V251 Rear Door Wiring Loom Harness Cable Right O/S A2514402409

€28.95

Free delivery: Nov 12 – 13

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Part no. 9350314

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€28.95

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Part no. M8D2-14N164-AB

Land Range Rover Evoque L551 Battery Cable Harness Loom Cable M8D2-14N164-AB

€94.95

Free delivery: Nov 12 – 13

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Part no. 9269941

BMW X1 E84 Front Door Cable Harness Loom Driver Side Wiring 9233551

€32.95

Free delivery: Nov 12 – 13

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Part no. 04E903021M

Skoda Rapid NH1 1.4 TSI Petrol Alternator Generator Bosch 04E903021M

€37.95

Free delivery: Nov 12 – 13

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Part no. 3C8971693DM

VW Volkswagen Passat CC Rear Door Wiring Harness Cable Left N/S 3C8971693DM

€28.95

Free delivery: Nov 12 – 13

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