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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Audi A4 B9 Q7 4M Glow Plug Relay Control Unit 3.0 TDI 4M0907282A

€51.95

Free delivery: Nov 12 – 13

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Part no. 141951253B-2

VW Volkswagen Audi Seat Skoda Relay Unit 4 Pins 12V 40A 141951253B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9337205

BMW F32 Door Wiring Front Door Right Loom Cable Wiring Harness 9337205

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2536423

Ford Kuga C482 Radio Navigation Touchscreen Display Screen LJ6T-18B955-FE

€75.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4F0915519-1

Audi TT TTS 8J Battery Overload Protection Control Unit 4F0915519

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. NAD500280

Range Rover L322 Engine Starter Motor Unit 3.6 TDV8 Diesel NAD500280

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8509036-9

BMW E92 LCI Engine Control ECU 3.0 Diesel 335d M57N2 306D5 Automatic 8509036 Kit

€569.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 02Z911024B

Audi A3 8V VW Golf Mk7 Skoda Octavia Mk3 Starter Motor 1.6 TDI 02Z911024B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AB39-12A650-FF

Ford Ranger Mk6 3.2 TDCi SAFA 200HP ECU Engine Unit Manual AB39-12A650-FF

€303.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4E0919977A

Audi A8 D3 Sat Nav DVD Disc Drive Reader Head Unit Audio 4E0919977A

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9288301

BMW 1 2 3 4 Series F20 F21 F22 F30 F31 F32 F36 Module Control Unit FEM 9288301

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. HY32-18K812-CF

Jaguar XF X260 F-Pace X761 Radio Sat Nav Head Unit CD Player HY32-18K812-CF

€89.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3T1T-14301-AE

Ford Transit Connect Mk1 Battery Wiring Harness Power Cable 3T1T-14301-AE

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 997671821907

Porsche 911 997 Cabrio Air Module Control Unit 99761821907

€70.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6798872-2

BMW F10 F11 F30 F31 Wheel Electronics Module RDC 433MHZ Control Unit X2 6798872

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2055457200

Mercedes W205 Radio Stereo Head Unit Mount Bracket Holder Support A2055457200

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6H32-13W029-JA-2

Range Rover L320 Headlight Front Lamp Right O/S Wire Cable Plug 6H32-13W029-JA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8576341-14

BMW F20 F21 F30 F31 118d 318d Engine Control ECU DDE Kit FEM Key 8576341 Manual

€161.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9798377-2

Mini F60 B48X 224HP Engine Control Module Unit ECU DME Kit 9798377 Automatic

€379.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A4475400053

Mercedes Vito W447 Negative Battery Cable A4475400053

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2049060805-1

Mercedes S204 Estate Rear SAM Control Module Unit Fuse Box A2049060805

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5QA919294

PDC Module Audi A3 8V Q2 GA VW Crafter PDC Assist Control Unit 5QA919294

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1729051301

Mercedes SLK R172 Roadster Antenna Amplifier Control Module A1729051301

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. JPLA-14D619-BB

Range Rover Sport L494 Door Control Module Rear Left N/S JPLA-14D619-BB

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A6461501934-1

Mercedes CL203 CLC200 CDI 122HP M646.963 Engine ECU Kit A6461501934 Key Lock

€123.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3Q0937125C

Audi RS3 F3 RSQ3 F3 Fuse Box Housing Module Left N/S 2.5 TFSI 3Q0937125C

€99.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0015423723

Mercedes A E Class W169 W211 Parking Sensor Display Control PDC A0015423723

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8589948

BMW G20 G21 Positive Battery Cable Wiring Loom 8589948

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6934011

BMW 7 Series E65 E66 Cable Harness Loom Front Door Wiring Left N/S 6934010

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2205402645

Mercedes C215 W220 R230 Gateway Control Module System Diagnosis Unit A2205402645

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P5035500B-1

Porsche Cayenne 92A VTS Vehicle Tracking Aerial Antenna Amplifier 7P5035500B

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6819936

BMW F30 F31 F32 F15 F16 Rear Door Card Light Lamp LED Wiring Harness 6819936

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2135409916

Earth Ground Cable Mercedes W213 S213 Battery Wiring Loom Engine A2135409916

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A1779069601-1

Fuse Box Mercedes W177 W247 Front Relay Engine Control Unit Module A1779069601

€123.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0038207426

Mercedes W221 Door Module Control Unit Rear Right O/S A0038207426

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6812250

BMW X1 F48 Door Wiring Loom Harness Cable Front Passenger Side N/O/S 6812250

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8H22-14633-AA

Land Rover Discovery 3 L319 Rear Door Wiring Harness Loom Left N/S 8H22-14633-AA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6809472

Mini Cooper F56 Front Door Wiring Loom Harness Driver Side 9389221

€56.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2078205489

Mercedes-Benz W207 A207 Left Right A-Pillar Radio Aerial Antenna Amplifier Unit

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BV6T-14B526-BA

Ford Focus Mk3 Voltage Stabilisation Control Module Unit BV6T-14B526-BA

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8V0971100C

Sunroof Wiring Cable Audi A3 8V Roof Motor Electrical Harness Loom 8V0971100B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2214405413

Mercedes W221 Front Door Wiring Harness Driver's Side A2214405413

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5G0971175C

Volkswagen Golf Mk7 Rear Tailgate Boot Lid Wiring Adapter Loom 5G0971175C

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7253188

BMW E92 Sport Seat Left Right Thigh Support Heated Cover Trim Leather Dakota

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7588502-2

BMW Mini Cooper R55 R56 N12 1.6 Petrol Engine ECU Kit DME 7588502 CAS3 + 2 Keys

€237.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K2907115S-2

Audi A5 8T Engine Control ECU 2.0 TFSI CDNB 180HP Manual 8K2907115S Kit

€89.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2079000600

Mercedes C207 Door Module Rear Right O/S Control Unit ECU A2079000600

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. AH22-01445-AB

Land Rover Discovery 4 L319 Battery Tray Heat Shield N/S Left AH22-01445-AB

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2485827

Ford Transit Connect Mk2 Smart Data Link Module Connection Unit LV6T-14F642-DB

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A0005468602

Mercedes W167 W205 W213 X253 Positive Battery Terminal Cover Cap A0005468602

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0959795F

Audi A5 8F Window Lifter Module Control Unit Rear Left Right N/O/S 8T0959795F

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8U0971104E

Audi Q3 8U Rear Bumper PDC Parking Sensor Wiring Harness Loom Cable 8U0971104E

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8T0971029AE

Audi A5 S5 8T Coupe Front Door Wiring Loom Harness Driver's Side 8T0971029AE

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 93457542

Radio Player Renault Trafic III Vauxhall Vivaro B Audio Head Unit 93457542

€227.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8K0959795E

Audi A4 B8 A5 8F Door Window Control Module Front Left Right N/O/S 8K0959795E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2135401087

Mercedes W205 W213 Battery Starter Alternator Wiring Harness OM654 A2135401087

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. BS7T-14K131-BA

Range Rover Evoque L538 Fuse Relay Box Module 2.2 Diesel BS7T-14K131-BA

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2045451040

Mercedes W204 W212 Multimedia Interface Unit Module Bracket Mount A22045451040

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. JPLA-14D618-BB

Range Rover Sport L494 Front Door Control Module Driver's Side JPLA-14D618-BB

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7823314

Mini Cooper R55 R56 R57 LCI N47N 1.6 Diesel Engine Starter Motor 7823314

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9118262

Antenna Amplifier BMW F10 F22 F30 F32 Module Trap Circuit Control Unit 9118262

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 3c0937125

Volkswagen VW Passat B6 Fuse Box Relay Electrical Module Unit 3C0937125

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5B4D4A9

BMW X1 U11 B38X 245HP xDrive Engine Control ECU DME 5B4D4A9 Automatic

€807.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9326452

Door Wiring Harness BMW F34 Rear Left Right Door N/O/S Wiring Loom 9326452

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2129060605

Mercedes W212 Fuse Box Rear Relay Control Unit Electric Module SAM A2129060605

€85.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9252812

BMW F10 F11 F01 Fuse Box Power Distribution Junction Relay Rear 9252812

€51.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8067511

BMW F98 Adapter Cable Wiring RBS Rear Axle 8067511

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7P0907311C-1

Volkswagen Touareg 7P 3.0 TDI CJMA 204HP Engine ECU Set 7P0907311C Automatic

€707.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6819934

BMW X5 F15 X6 F16 Front Door Card Light Wiring Loom Left Right N/O/S 6819934

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1J0972732

Audi Q7 4L Rear Tail Light Lamp Bulb Connector Wiring Left Right N/O/S 1J0972732

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2215408335

Mercedes W221 Door Harness Left Right N/O/S Rear Door Wiring Loom A2215408335

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8674262-1

Mini Cooper S F55 F56 B48 192HP Engine Control Unit ECU Kit DME 8662849 Manual

€189.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9323378

BMW X5 F15 X6 F16 Front Door Card Wiring Loom Harness Cable Left N/S 9323378

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5N0971693A

Volkswagen Tiguan 5N Rear Door Harness Cable Wiring Left Right N/O/S 5N0971693A

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9348356

BMW F20 F21 F22 F30 F32 Front Electronic Module Control Unit FEM 9348356

€118.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1Z0035729E

Seat Ibiza 6J Bluetooth Interface Box Control Unit Module ECU 1Z0035729E

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6958414

BMW E60 E61 Alarm System Unit Ultra Sonic Module 9149673

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 1K0907530H

Volkswagen Golf Mk5 Gateway Control Unit Module Controller 1K0907530H 1K0907951

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8X0915459

Audi A1 8X Positive Battery Overload Protection 8X0915459

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. PZ3T-15K868-ABC

Ford Transit Custom Mk2 Rear Bumper Parking Wiring Loom Harness PZ3T-15K868-ABC

€104.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 03P906021BD

Seat Ibiza Mk4 6J Engine Control Module ECU 1.2 Diesel 03P906021BD + Key Manual

€113.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8W0907063CF

Audi A4 B9 Body Control Comfort Unit Module BCM Unit ECU 8W0907063CF

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 4K0803123B

Audi A6 C8 Battery Clamping Strip Holder Support Carrier Mount 4K0803123B

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A4539002104

Smart 453 Fortwo Audio System Radio Navigation Unit Module A4539002104

€94.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5WP33531

Ford Kuga 2.0 TDCi 4x4 Haldex Control Module Transfer Box HAP542 5WP33531

€275.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 9X23-14305-EC

Jaguar XF X250 Starter Motor Wire Harness Wiring Loom Cable Line 9X23-14305-EC

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5Q0915181E

Audi A3 8V Negative Battery Terminal Cable Harness Wiring Loom 5Q0915181E

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5K4971694AH

Volkswagen Golf Mk6 Door Wiring Loom Harness Rear Right O/S 5K4971694AH

€42.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8506666

Mini Cooper D R60 ALL4 N47N Diesel Engine Control Unit ECU DDE 8506666 Manual

€47.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 6863386

BMW F33 ICM Control Unit Module ECU 6863386

€80.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 5E7035577B

Skoda Octavia Mk4 NX Aerial Antenna Amplifier Control Unit 5E7035577B

€37.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8582280-11

BMW F20 F30 F31 118d 318d N47N 143HP Engine Unit ECU DDE Kit 8582280 FEM + Key

€165.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8590102

Alternator Cable BMW 5 G30 G31 G12 B57 Battery Wiring Alternator B+ 8590102

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2044409005

Mercedes W204 Battery Wiring Starter Alternator Wiring Harness A2044409005

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. H1BT-14F642-AE

Ford Fiesta ST MK8 Port Data Link Module OBD Smart Link H1BT-14F642-AE

€28.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 7621178-5

BMW E81 E87 LCI E90 N43 118i 318i Engine Control ECU DME Kit 7621178 Automatic

€375.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 2755704

Genuine BMW Mini Cooper One R55 R56 R57 R60 R61 Fuse Box Empty Housing 2755704

€23.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. A2195404605

Mercedes C219 Rear Bumper PDC Wiring Parking Sensor Loom Harness A2195404605

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

Part no. 8R0971030B

Audi Q5 8R Front Door Wiring Loom Harness Cable Passenger Side 8R0971030B

€32.95

Free delivery: Nov 12 – 13

If paid before 14:00

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