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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VW Volkswagen Transporter T6 Air Module Control Unit ECU 7E0959655D

€104.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 03L906021P-1

Volkswagen Crafter 2E 35 2.0 TDI CSLA 109HP Engine ECU Kit 03L906021P Manual

€569.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. KK2T-19L540-AC

Ford Transit Custom Mk8 Sliding Side Door Wiring Loom Left N/S KK2T-19L540-AC

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7P5959107E

Porsche Macan 95B Rear Tailgate Control Module Unit 7P5959107E

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8U0971035S

Audi Rs Q3 8U Front Door Wiring Harness Loom Wire Driver's Side 8U0971035S

€28.95

Free delivery: Sep 14 – 15

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Part no. A2049007408-1

Mercedes W204 Display Screen Information Navigation Dashboard A2049007408

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009826222

Mercedes W205 W213 W238 W253 Starter Battery 48V A0009826222

€759.95

Free delivery: Sep 11 – 15

If paid before 14:00

Part no. A9076830400

Mercedes W907 Fuse Box Relay Cover Lid Control Unit Bracket Trim A9076830400

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. BK2T14B144BA

Ford Transit Custom MK8 2.2 TDCI Fuse Relay Box Unit Module BK2T14B144BA

€23.95

Free delivery: Sep 14 – 15

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Part no. DH52-14B296-AB

Land Rover FREELANDER 2 L359 Electronic Module DH52-14B296-AB

€28.95

Free delivery: Sep 14 – 15

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Part no. 284B14011R

Smart 453 Fortwo Body Control Module SAM Control Unit 284B14011R

€104.95

Free delivery: Sep 14 – 15

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Part no. AH42-18B008-AG

Range Rover L322 Air Suspension Control Unit Module CVD AH42-18B008-AG

€113.95

Free delivery: Sep 14 – 15

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Part no. 4K0035502A

Audi A6 C8 A7 4K Centre Console Wireless Charging Station 4K0035502A

€113.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q4959592F

VW Crafter Sy Skoda Octavia 5E Door Control Unit Front Passenger Side 5Q4959592F

€23.95

Free delivery: Sep 14 – 15

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Part no. A1725400433

Electric Wire Mercedes SLK R172 M271 Alternator Prefuse Box Wiring A1725400433

€28.95

Free delivery: Sep 14 – 15

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Part no. A1664400137

Mercedes W166 AdBlue Tank Reservoir Wiring Harness Loom Cable Wire A1664400137

€94.95

Free delivery: Sep 14 – 15

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Part no. 8585384-1

BMW X4 F26 X5 F15 N57 Diesel Engine Control ECU Kit Set 8585384 Automatic

€393.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9221953

BMW X5 E70 Interior Inner Wiring Loom Harness Cable 9221953

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W0962239

Audi A5 S5 F5 Boot Trunk Lid Tailgate Opening Sensor Line Harness Wire 8W0962239

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9151864-1

HiFi Speaker BMW X5 E70 X6 E71 X3 E83 Top HiFi Sound Unit Door Card 6949734

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4E0035652E

Audi A6 C6 MMI Multimedia Sat Nav Navigation Control Head Unit 4E0035652E

€108.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. L8B2-14F012-BA

Range Rover Velar L560 Tyre Pressure Sensor Control Module L8B2-14F012-BA

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4030026

BMW Z4 E85 Xenon Headlight Resistor Ballast Relay Module Unit 4030026

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 06K907425B-11

VW Golf Mk7 R 2.0 TFSI CJXC 300HP Engine Control ECU Kit 06K907425B Automatic

€227.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A1725408705

Mercedes R172 Electrical Wiring Harness Cable Window Regulator A1725408705

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 3WA959393A

Volkswagen Crafter Mk2 SY Door Control Unit Module Driver Side 3WA959393A

€70.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 81A971035AP

Audi Q2 GA Front Door Wiring Harness Loom Cable Driver Side 81A971035AP

€47.95

Free delivery: Sep 14 – 15

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Part no. REAV6N-11000-GE

Ford Focus Starter Motor 1.5 Diesel Start/Stop REAV6N-11000-GE

€37.95

Free delivery: Sep 14 – 15

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Part no. 9G9T-14240-HBA

Ford Mondeo Mk4 Rear Door Wiring Loom Harness Cable Right O/S 9G9T-14240-HBA

€23.95

Free delivery: Sep 14 – 15

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Part no. A2198203761-1

Headlamp Mercedes W219 Headlight Xenon Light Front Left N/S Harness A2198203761

€23.95

Free delivery: Sep 14 – 15

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Part no. 8091664

Baterry Cable Bracket BMW X3M F97 X4M F98 S58 Alternator Wire Holder 8091664

€28.95

Free delivery: Sep 14 – 15

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Part no. A1668200400

Mercedes GLE W166 C292 Front Seat Occupancy Sensor Wire Harness A1668200400

€89.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9288299

BMW F20 F30 F31 Body Comfort Module Control Unit FEM 9288299

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 2198947-1

Ford Fiesta Mk8 Engine Alternator Generator 1.5 EcoBoost 150A JX6T-10300-FA

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9171900

BMW X5 E70 X6 E71 Computer Control Unit DVD Player RSE MID PLUS PL4 9171900

€360.95

Free delivery: Sep 14 – 15

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Part no. A2749003900

Mercedes Vito W447 Electronic Control Unit Module ECU A2749003900

€94.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8K0907064FE

Audi A4 B8 BCM2 Body Comfort Module Control Unit Board Power Supply 8K0907064FE

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4G5945093A-2

Audi A6 C7 Rear Tail Light Lamp LED Wiring Cable Inner Left N/S 4G5945093A

€23.95

Free delivery: Sep 14 – 15

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Part no. LR157219

Range Rover Sport L494 Glow Plug Wiring Loom 3.0D MHEV LR157219

€99.95

Free delivery: Sep 14 – 15

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Part no. A1775409141

Mercedes W177 W243 W247 Front Door Wiring Harness Cable Driver Side A1775409141

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W0907160B

Audi A4 A5 S5 F5 Engine Noise Sound Actuator Control Module 8W0907160B

€208.95

Free delivery: Sep 14 – 15

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Part no. A2215400305

Mercedes W221 Rear Axle Wiring Harness Loom Brake Wear Indicator A2215400305

€23.95

Free delivery: Sep 14 – 15

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Part no. DS7T-15603-CA

Volkswagen Amarok Mk2 Keyless Entry Antenna Amplifier Module ECU DS7T-15603-CA

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 34F231301

Fiat Ducato Omron Lancia Fiat Alfa Relay 12V 10/20A 34F231301

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9134646

Seat Module BMW E65 E66 Front Seat Control Unit Module ECU 9134646

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. L8D2-14N290-AE

Land Rover Discovery Sport L550 Negative Battery Cable 1.5 PHEV L8D2-14N290-AE

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8483816

BMW X3 G01 X4 G02 Cable Alternator Starter Base B Wire Line 8483816

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6860182

BMW F30 F31 F34 Acc Sensor Distronic Radar Module Unit 66316860182

€393.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8J0907274

Audi TT 8J Tyre Pressure Control Module Unit 8J0907274

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. FW93-14F012-BE

Land Rover Discovery Sport L550 Tyre Pressure Control Unit TPMS FW93-14F012-BE

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. AH42-14N030-AE

Land Rover Range Rover L322 Rear Fuse Relay Box AH42-14N030-AE

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5A70A69

BMW F40 Parking Module Comfort Control Unit ECU 5A70A69

€142.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9318368

BMW X3 F25 F06 F06N F07 F07N F10 F10N F11 CAS4 Comfort Control Module 9318368

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8740343-3

BMW F20 F30 F32 LCI B48 184HP Engine Control Unit ECU DME 8740343 Manual

€360.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009006907

Mercedes W205 Tire Pressure Control Module A0009006907

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 81A971687N

Audi Q2 GA Door Wiring Loom Harness Cable Rear Right Left N/O/S 81A971687N

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. BT4T-14F014-AE

Ford Mondeo Mk5 USB SD Card Module Input Port Media Gateway BT4T-14F014-AE

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8W0941828

Audi A4 B9 A5 F5 Fuse Box Battery Terminal Housing 3.0 TDI 8W0941828

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A0009050038

Mercedes W212 Multi-Purpose Windscreen Camera Control Unit Module A0009050038

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8387568-1

BMW E65 Battery B Engine Compartment Terminal Point Cover 8387568

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2055409229

Mercedes C205 Rear Shock Absorber Wiring Harness Cable Left N/S A2055409229

€28.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. GK3T-14A120-AC

Ford Transit Positive Battery Lead Harness Wiring Cable Loom GK3T-14A120-AC

€51.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. DB39-14A073-DC

Ford Ranger Mk6 Comfort Control Unit BCM 3.2 DB39-14A073-DC

€398.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8730190

BMW G30 G31 Rear Door Wiring Loom Harness Cable Right O/S 8730190

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A4148200526

Mercedes Vaneo W414 Front Left Right Door N/O/S Control Unit Module A4148200526

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7G9T-14B534-BE

Ford Mondeo Mk4 Door Window Control Module Rear Left Right N/O/S 7G9T-14B534-BE

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2218708992

Mercedes W221 C216 Telephone Bluetooth Connection Control Module A2218708992

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6C1T-14A076-AD

Ford Transit Mk7 Fuse Box Housing Lid Cover Trim 6C1T-14A076-AD

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. BK3T-19L540-DE

Ford Transit Mk8 Rear Sliding Door Wiring Loom Harness Cable BK3T-19L540-DE

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8576341-4

BMW F20 F21 F30 F31 118d 318d 143HP N47N ECU Kit DDE 8576341 + Key + FEM

€284.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5G0971104P

Volkswagen Golf R Mk7 Rear Bumper PDC Parking Sensor Wiring Harness 5G0971104P

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4H0959795B

VW Touareg 7L Rear Door Control Unit Module Left Right N/O/S ECU 4H0959795B

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. BV6T-14E073-BAB

Ford Kuga Mk2 Front Door Wiring Harness Cable Loom Right O/S BV6T-14E073-BAB

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5WA959354

VW Volkswagen Golf Mk8 Air Module Control Unit Crash Impact Sensor 5WA959354

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7644747

BMW F10 F11 F30 Petrol N20 ECU DME Engine Control Unit Module 7644747 Manual

€398.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. NU5T-14B531-JA

VW Amarok Mk2 Door Module Control Unit Front Rear Driver's Side NU5T-14B531-JA

€56.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. BH42-12A650-NAC

Range Rover L322 4.4 448DT 313HP Engine Control ECU BH42-12A650-NAC Automatic

€294.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 2628162

Ford Kuga C482 Radio CD Player Head Unit Satelite Navigation MX6T-18K810-ZA

€75.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A4209008704

Mercedes Sprinter W907 W910 Stereo Media Sat Nav Head Unit A4209008704

€279.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7649938

BMW Z4 Series E89 Roadster Wiring Loom Harness Engine Gearbox Module Petrol N20

€23.95

Free delivery: Sep 14 – 15

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Part no. 9364817

BMW X1 E84 ECU Body Comfort Control Module Junction Box PL2RR JBBFE IIIR 9364817

€42.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 4K0906121C

Fuel Pump Control Audi A4 B9 A5 F5 A6 C8 Pump Unit Module ECU 4K0906121C

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 3V9971104A

Skoda Superb Mk3 3V Rear Bumper Wiring Harness Cable 3V9971104A

€32.95

Free delivery: Sep 14 – 15

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Part no. 4M0907508

Audi A6 C8 Acceleration Crash Impact Sensor Control Unit 4M0907508

€32.95

Free delivery: Sep 14 – 15

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Part no. 8W0941823

Audi A5 F5 Power Distribution Relay Fuse Box Battery 8W0941823

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. H1BT-18C815-VN

Ford Fiesta MK8 Radio Head Unit Sat Nav Module H1BT-18C815-VN

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6833256-1

BMW G20 G21 G28 Pedestrian Protection Crash Sensor Unit Module 6833256

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 03G906021FT

VW Eos 2.0 TDI BMM 140HP Engine Control Unit Module ECU 03G906021FT Manual

€66.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 8793253

BMW X3 G01 Rear Right O/S Door Wiring 8793253

€28.95

Free delivery: Sep 14 – 15

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Part no. 9382418

BMW F45 X1 F48 G30 Telematics Module Bluetooth Telephone Control Unit 9382418

€28.95

Free delivery: Sep 14 – 15

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Part no. 9315981

BMW F33 F33 LCI Seat Wire Harness Cable Loom Front Right O/S 9315981

€94.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 7S7F-18C821-CB

Ford Transit Mk7 Sony Radio Player 6 CD Changer Head Unit 4M5T-18C815-CJ

€89.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2208216879

Mercedes W220 Rear Door Control Module Unit Right O/S A2208216879

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. A2198200315

Mercedes C219 Console Car Phone Voice Control Harness Wire Loom A2198200315

€47.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. GK2T-9K499-ABB

Ford Transit Custom Engine Fuse Box Wiring Loom Harness Cable GK2T9K499ABB

€113.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. KG9T-14B275-DD

Ford Mondeo Mk5 Heated Windscreen Rear View Mirror Wiring Cable KG9T-14B275-DD

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 1T0909606

VW Volkswagen Touran 1T Air Module Control Unit Crash Impact Sensor 1T0909606

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5B3FE16

Mini Cooper F66 PTS Pedestrian Protection Sensor Control Unit 5B3FE16

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Part no. 8U0971029AJ

Audi Rs Q3 8U Front Door Wiring Loom Cable Harness Driver's Side 8U0971029AJ

€32.95

Free delivery: Sep 14 – 15

If paid before 14:00

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