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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Fuse Box Mercedes S205 Interior Front Relay Fuse Box Sam Module A2059007539

€108.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. HK83-14D617-BB

Land Rover L550 L538 Jaguar XE Door Module Front Passenger Side HK83-14D617-BB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6956505-1

BMW 5 6 Series E60 E61 E63 E64 1 Power Distribution Fuse Relay Box Rear 6956505

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4G5971693A

Audi S6 C7 Door Trim Panel Wiring Wire Harness Cable Rear Left N/S 4G5971693A

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5A4CFA9

BMW G20 LCI Fuse Box Control Module Unit 5A4CFA9

€165.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5C0951171

Volkswagen Scirocco Mk3 Amarok Alarm Motion Sensor Control Module 5C0951171

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0959793Q

Audi A4 B8 Door Module Control Unit ECU Front Driver's Side 8K0959793Q

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P4035223B

Audi S3 8P Audio Sound BOSE Amplifier Stereo System Module 8P4035223B

€132.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8662411-7

BMW F20 LCI 118i B38 136HP Engine Control ECU Kit DME 8662411 Manual

€569.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0971035C

Audi A5 S5 RS5 8T Door Wire Harness Loom Cable Wiring Driver's Side 8T0971035C

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2S7T-14B192-AA

Range Rover L322 Black Relay 4-Pin Unit 12V 40A 2S7T-14B192-AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9371790

BMW 1 Series F20 Telematics Control Unit Module Bluetooth 9371790

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9426210

Mini F56 F57 BMW F45 B48D 231HP Engine Control Module Unit ECU 9426210 Manual

€313.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0971615CT

Volkswagen Passat CC 3C B7 Engine Wiring Harness Loom Cable Guide 1K0971615CT

€23.95

Free delivery: Nov 12 – 13

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Part no. 4H0971160A

Audi A8 D4 Door Card Wiring Harness Loom Front Passenger Side 4H0971160A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 04L907309R-9

Audi A3 8V 2.0 TDI 150HP DCYA Engine Control ECU Kit 04L907309R Manual Gearbox

€142.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0971029B

Audi Q5 8R Front Door Wiring Loom Harness Cable Driver's Side 8R0971029B

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3G5035953

Skoda Karoq Superb 3V USB Distributor Voltage Converter Unit Module 3G5035953

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8676222

BMW 3 F30 LCI Hybrid 330e Battery Starter Connecting Lead Cable Wiring 8676222

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3AF945093K-2

Volkswagen Passat B7 Rear Tail Light Left N/S Harness Loom Wire Cable 3AF945093K

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4H0907468AE

Audi A8 D4 Gateway Control Module Diagnostic Interface BUS 4H0907468AE

€89.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2711508033

Mercedes W204 Engine Wiring Harness Cable Loom A2711508033

€313.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9184560

BMW E65 E66 Seat Control Module Unit ECU 9134633 9184560

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. CV6Q-12A650-BJ

Ford Focus Mk3 Engine Control Unit ECU 115HP 1.6 TDCi Manual CV6Q-12A650-BJ

€232.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2S7T-14B192-AA-1

Range Rover L322 Black Relay 4-Pin Unit 12V 40A 2S7T-14B192-AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P0971679J

Audi A3 8P Dashboard Glove Box Wiring Hanress CD Changer Cable 8P0971679J

€32.95

Free delivery: Nov 12 – 13

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Part no. 3M5T-14A464-ZZF

Ford Focus Mk3 ABS Brake Pump Control Unit Connector Plug 3M5T-14A464-ZZF

€23.95

Free delivery: Nov 12 – 13

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Part no. 9134642

BMW E60 LCI Front Seat Control Module Unit ECU Left Right N/O/S 9134642

€51.95

Free delivery: Nov 12 – 13

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Part no. 5H0971100K

VW Golf Mk8 Interior Headliner Roof Wiring Harness Cable Connector 5H0971100K

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9124585

BMW 1 3 Series E87 E90 Front Rear PDC Ultrasonic Parking Sensor Sedonarot Red

€26.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8681981

BMW F39 F48 Mini F56 F60 Gearbox Transmission Control Unit Module ECU 8681981

€142.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K6945095-1

Volkswagen Golf Mk5 Rear Tail Light Outer Lamp Wiring Cable Left N/S 1K6945095

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1380701080

Peugeot Boxer Bluetooth Aerial Antenna Control Unit Module Mopar 1380701080

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2GA947202

VW Volkswagen T-ROC A11 Front Door LED Handle Light Wiring Right O/S 2GA947202

€23.95

Free delivery: Nov 12 – 13

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Part no. A2055409995

Mercedes C205 Pressure Sensor Wiring Loom A2055409995

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2038202664-2

Mercedes Cl203 Taillight Lamp Light Rear Right O/S Harness Loom Wire A2038202664

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9323477

BMW X5 F15 X5 M F85 Rear Door Wiring Harness Left Right N/O/S 9323477

€42.95

Free delivery: Nov 12 – 13

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Part no. 8978002040

Toyota Auris E15 Central Locking Immobilizer Control Unit Module 8978002040

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 270600T010

Toyota Auris E15 Corolla E12 Yaris Verso Alternator 90A 12V 270600T010

€66.95

Free delivery: Nov 12 – 13

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Part no. 6906392

Land Rover Range Rover L322 Dashboard Security Alarm Indicating Light 6906392

€23.95

Free delivery: Nov 12 – 13

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Part no. 3C0959433AQ

VW Volkswagen Passat B6 Body Convenience Control Module Unit BCM ECU 3C0959433AQ

€32.95

Free delivery: Nov 12 – 13

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Part no. 04L906021BH-1

Audi A4 B8 2.0 TDI CNHA 190HP Quattro Engine Control ECU Kit 04L906021BH Manual

€284.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9244417

Mini Navigation Head Unit R55 R56 R57 LCI R60 R61 CHAMP 2 Sat Nav DAB 9244417

€322.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 83A035382A

Audi RSQ3 F3 Boot Trunk Subwoofer Rear Bass Speaker 83A035382A

€75.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 07L971627F

Audi S8 D3 Wiring Harness Wire Injectors Cylinders 1-5 5.2 FSI Petrol 07L971627F

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8P4971693S

Audi A3 8P Rear Door Wiring Loom Harness Left Right N/O/S 8P4971693S

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7645837

BMW i3 I01 Electric Gearbox Gear Shifting Actuator Module Unit 7645837

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L911021G

Audi A4 B8 A5 8T A6 C7 Starter Motor Actuator Bosch Diesel Engine 03L911021G

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6401504034-1

Mercedes W245 B200 OM640.941 140HP Engine Control ECU Kit A6401504034 Automatic

€189.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7612860

BMW F20 F21 F30 F31 F32 Battery Holder Bracket Supporting Rail 7612860

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6915327

BMW E46 E39 E60 E81 E87 E90 E91 F10 F20 F30 Relay Make Contact Sky Blue 6915327

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9337200

BMW 4 Series F32 F32N LCI Cable Loom Door Driver's Side Wiring Harness 9337200

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8490136

BMW F20 F21 F30 LCI B47 Wiring Loom Harness Engine Module 8490136

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8716575

BMW G20 G21 G21 LCI Door Wiring Harness Loom Front Driver's Side 8716575

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9353419

BMW F10 F11 Body Control Comfort Module Unit Junction Box ECU 9353419

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2048200089

Mercedes-Benz C E Class W204 W207 Aerial Antenna Amplifier Unit A2048200089

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9253209

BMW E81 E87 LCI E90 E91 N43 DC/DC Wandler Torque Converter Module ECU 9253209

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8806980

BMW i3 I01 LCI Door Wiring Cable Loom Harness Rear Left Right N/O/S 8806980

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6955469

BMW E64 Air Module ECU Control Unit Centre Vehicle Sensor 6955469

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9387151-1

BMW F30 Hybrid 330e B48X Positive Battery Lead Cable Starter Unit Wiring 9387151

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. KG9T-2B392-ED

Ford Mondeo Mk5 Front Height Level Sensor Wiring Cable Adapter KG9T-2B392-ED

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. XS-FB1030

Speakers Three Way Speaker Loudspeaker Sony XS-FB1030 4"

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5QF802631

Volkswagen Tiguan Mk2 Audi RSQ3 Mk2 Battery Mount Bracket Support 5QF802631

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9315152

BMW X3 F25 Fuse Box Grouping Map Diagram Location 9315152

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. N1BT19H406CA

Ford Puma ST CF7 Front Window Windscreen Camera Control Unit N1BT-19H406-CA

€61.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8579479-6

BMW F20 F21 F30 F31 116HP N47N Engine Control Unit ECU Kit DDE 8579479 Manual

€275.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AH42-18808-BC

Land Rover Range Rover L322 Front Door Tweeter Speaker Right O/S AH42-18808-BC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0009069905

Mercedes W205 W213 Engine Alternator Generator M264 Petrol A0009067703

€161.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 02M911023S

Audi TTRS 8J VW Golf Mk6 Starter Motor Engine Bosch 2.0 TDI Diesel 02M911023S

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2079002800

Mercedes W207 Convertible Door Module Front Right O/S Control Unit A2079002800

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. C451-SCREEN

Smart ForTwo C451 Screen Radio Multimedia Display Module Unit Center Console

€89.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0035729C

Volkswagen New Beetle Multimedia Interface Control Module ECU 5N0035729C

€151.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3M5T-14N003-SB

Land Rover Discovery 4 L319 Wiring Harness Loom Passenger Seat 3M5T-14N003-SB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8X0945093-2

Audi A1 8X Boot Trunk Taillight Rear Left N/S Loom Wire Harness 8X0945093D

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9X23-14300-FC

Jaguar XF X250 Battery Positive Power Terminal Cable Wiring 9X23-14300-FC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 95561209201

Porsche Cayenne 955 9PA Starter Negative Minus Battery Cable Wiring 7L0971228F

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F0907468R

AUDI Q7 4L Quattro 3.0 TDI BUS Diagnostic Gateway Interface Module 4F0907468R

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F0919887M

Audi A5 8T Navigation System Car Sat Nav Computer Head Unit 4F0919887M

€104.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8S0971228C

Audi TTS FV Starter Motor Wiring Loom Cable Harness 8S0971228C

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8580192

Glow Plug Cable BMW G20 X3 G01 B47 Wiring Harness Engine Glow Module 8580192

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BJ32-14A614-BBD

Range Rover Evoque L538 Power Steering Rack Wiring Loom Harness BJ32-14A614-BBD

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7798141

BMW E87 E90 Control Unit Box Closed Lid Cover Trim Bracket Diesel 7798141

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 130002613-1

BMW 5 X5 7 Series E60 E61 E65 E70 Longitudinal Seat Adjusment Drive Motor

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

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Audi A4 S4 8W A5 S5 F5 Battery Positive Terminal Cover Housing Cap 8W0915429A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. HY32-4C117-AD

Range Rover Sport L494 Rear Differential Control Module Unit HY32-4C117-AD

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8387568

BMW 7 Series E65 E66 Battery B Engine Compartment Terminal Point 8387568

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9389248

Mini F55 Door Wiring Loom Harness Cable Passenger Side 9389248

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3AC971557E

VW Volkswagen Passat B7 Door Wiring Loom Harness Front Right O/S 3AC971557E

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9436256

BMW G20 G21 Front Passenger Door Cable Harness Wiring Control Unit 9436256

€61.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8H0919889A

Audi A4 B7 Convertible Aerial Antenna Amplifier Control Unit Module 8H0919889A

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03L907309AE-3

Volkswagen Passat CC 2.0 TDI CFGC 177HP Engine ECU Kit 03L907309AE Automatic

€237.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9226333-1

BMW E88 Cabrio ECU Body Control Module H3 Junction Box 9226333

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F0910177

Audi A6 C6 Safety Ultra Sonic Alarm Movement Detector Module Unit 4F0910177

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9806332

Mini R60 R61 Ultra Sonic Module Alarm System Sensor 9806332

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6R0971839A

VW Volkswagen Polo 6R 1.2 TSI Petrol Fuel Sender Pump Cover Panel 6R0971839A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6R0959655M

VW Volkswagen Polo 6R Seat Ibiza 6J Air Module Control Unit ECU 6R0959655M

€104.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AM5T-18C815-HL

Ford Fiesta Mk7 C-Max Mk2 Radio CD Player Stereo Head Unit AM5T-18C815-HL

€151.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2465404300

Mercedes W176 Door Harness Loom Cable Wiring Rear Right A2465404300

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AH42-14630-ACB

Land Range Rover L322 Front Door Wire Loom Harness Passenger Side AH42-14630-ACB

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

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