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 Tiguan Mk1 5N Audi A1 8X Alternator Generator 1.4 TFSI 03C903025DX

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6819335

BMW F20 F30 BCM Body Comfort Control Module CCM Unit ECU 6819335

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7533283

BMW X3 Z4 Series E83 LCI E85 E86 Cover Top Power Distribution Fuse Box 7533283

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2K5971557C

Volkswagen Caddy 2K Door Wiring Harness Cable Front Left Right O/S 2K5971557C

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2055406621

Starter Cable Mercedes W205 GLC X253 Electrical Wiring Harness A2055406621

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1321501033

Smart Fortwo 451 Starter Alternator Wiring Loom Cable 1.0 M132 A1321501033

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8678968

Engine Wiring Mini F56 F60 BMW F45 F46 Petrol Sensor Module 1 Harness 8678968

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 982907159B

Porsche Cayman 718 982 Impulse Sender Control Unit Module 982907159B

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 95B907801C

Porsche Macan 95B Electric Parking Brake Module Control Unit 95B907801C

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7951288

BMW F20 F30 F31 Mini F55 F56 F60 Control Unit Air Conditioning Module 7951288

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971030AP

Audi A4 B8 Passenger Front Door Wiring Harness Loom Cabling 8K0971030AP

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 04L907309R-4

Skoda Octavia III 5E 2.0 TDI 184HP CUNA Engine Control ECU Kit 04L907309R Manual

€142.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6920469

BMW E65 E66 E67 Sensor A-pillar Right Airbag 65776920469 6920469

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. F1F1-12A650-SA-1

Ford Focus Mk3 1.5 TDCI XWD 120HP Engine ECU Kit F1F1-12A650-SA BCM + 2 Key

€208.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. AH42-15K602-BC

Range Rover L405 Radio Antenna Reciver Module Unit AH42-15K602-BC

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4E0959655K

Audi A8 4E S8 D3 SRS Bag Control Air Module Unit Bosch 4E0959655K

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2218702086

Mercedes W221 Rear Seat Control Module Unit ECU A2218702086

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2055408709

Mercedes W205 Door Wiring Harness Loom Cable Front Driver's Side A2055408709

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9873545

PDC Module BMW F40 G20 G21 Parking Assistant Control Unit Module ECU 9873545

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8X23-17D547-AE

Land Rover Discovery 4 L319 Windscreen Rain Sensor Unit Module 8X23-17D547-AE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 141951253B-5

Porsche Carrera 996 Relay Number 53 Unit Module 4 Pins Set X3 141951253B-5

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6H22-18C815-AA

Land Rover Discovery 3 L319 Stereo Radio CD Player Head Unit 6H22-18C815-AA

€151.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7519401

BMW 5 Series E60 E61 Positive Battery Starter Alternator Wire Cable 7519401

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A971104AP

Audi Q3 RSQ3 F3 Rear PDC Parking Sensors Wiring Loom Harness 83A971104AP

€85.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03G906021AB-1

Audi A3 8P 1.9 BLS 105HP Engine Control Unit ECU Kit 03G906021AB Manual

€165.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4N0906093D

Audi Q3 F3 Fuel Pump Control Module ECU 2.5 Petrol DNWA 4N0906093D

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. XQD000230PMA

Land Rover Freelander L314 Sat Nav Head Unit Navigation System XQD000230PMA

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7570488

Mini Cooper One R50 R52 R53 W10 1.6 Petrol Engine Starter Motor 7570488

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. AM2T-14D202-BA

Ford Galaxy Bluetooth Voice Control Wire Loom Cable Harness AM2T-14D202-BA

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7N5837202AC

Seat Alhambra 7n Ibiza 6J Leon 1P 5 Button Car Key Remote 434 MHZ 7N5837202AJINF

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5M5T-14B192-EA

Ford Transit Custom Grey Relay 12V 70A 4 Pin ++165271F 5M5T-14B192-EA

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 83A945091B-1

Audi Q3 RSQ3 F3 Rear Tail Light Wiring Cable Plug Outer Left N/S 83A945091B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8J0971615B

Audi TT TTRS 8J Front Gearbox Wiring Harness Cable Guide Left N/S 8J0971615B

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A4519060480

Smart ForTwo C451 Radio Stereo Audio Head Unit CD Bluetooth Bosch A4519060480

€227.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7PP907279CF

Porsche 718 Boxster 982 Body Control Module BCM ECU 7PP907279CF

€332.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0038208426

Crash Sensor Mercedes ML W164 W221 Front Rear Impact Airbag Unit A0038208426

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. BM5T-14D212-CC

Ford B-Max Bluetooth Electronic Control Module Unit ECU Mk1 BM5T-14D212-CC

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6823589

BMW F10 Xenon Footwell Light Module Control Unit ECU FRM III 9126314

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2139068701-2

Mercedes W205 W213 Fuse Box Rear SAM Module Electrical Control Unit A2139068701

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V0907376G

Audi A3 S3 8V Suspension Damping Control Unit Module 8V0907376G

€170.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W6945092N-1

Audi A5 F5 Rear Outer Taillight Lamp Wiring Loom Cable Right O/S 8W6945092N

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. DG9T-14B533-CF

Ford Mondeo Mk5 Front Door Control Unit Module Passenger Side DG9T-14B533-CF

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8582279

BMW F30 320d ed Diesel N47N 184HP Engine Control Unit ECU DDE 8582279

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4M5T-18812-EAC

Ford Focus Mk2 Antenna Aerial Wiring Harness Adapter 4M5T-18812-EAC

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V41-13A603-AD-2

Ford Kuga MK1 Rear Tail Light Inner Left N/S Cable Wire Harness 8V41-13A603-AD

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. K8D2-19H440-BB

Land Range Rover Sport L494 Keyless Entry Control Module ECU K8D2-19H440-BB

€94.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2045401307

Mercedes W204 Centre Console Lightning Dashboard Cable Wiring A2045401307

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. N9D3-14E159-AF

Land Range Rover Velar L560 Evoque L551 Air ECU Control Module N9D3-14E159-AF

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1665401913

Mercedes W166 GLE Heater Booster PTC Wiring Harness Loom Cable A1665401913

€37.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9247481

BMW X3 F25 Control Module CAS Unit ECU 20dX Diesel N47N 9247481

€113.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8583423-3

Mini R60 Cooper SD N47N 2.0 143HP Engine ECU Kit DDE 8583423 CAS3 Key Manual

€194.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03G906021PD-1

Volkswagen Caddy 1.9 TDI BLS 105HP Engine ECU Kit 03G906021PD BCM + Key Manual

€237.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8V51-14B144-BA

Ford Fiesta Mk7 Fuse Relay Box Module Control Unit 8V51-14B144-BA

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3C0035195C

Volkswagen Golf Mk5 Jetta Passat B6 Radio CD Player MP3 Unit 3C0035195C

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9380933

BMW F45 Front Door Wiring Driver's Door Cable Wiring Loom Harness 9380933

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A1639800164

Mercedes W163 Rear Bench Backrest Gas Strut Right O/S Side A1639800164

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4G5971035AH

Audi A6 C7 Front Door Wiring Harness Loom Cable Driver Side O/S 4G5971035AH

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8D0951253-1

Audi A4 B6 B7 B8 Q7 4L A6 C7 A8 D4 Multi Use Relay Unit Module 4 Pins 8D0951253

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 3449686

Mini Cooper R55 R56 R57 Passive Go Module Control Unit 3449686

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. RVH000055

Land Rover Range Rover Sport L320 Air Suspension Valve Block Module RVH000055

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7P5971114B

Porsche Cayenne 92A Crash Impact Sensor Fanfare Wiring Harness Cable 7P5971114B

€70.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 06F903023HX

Volkswagen Golf Mk5 2.0 TFSI Petrol Alternator Generator 06F903023HX

€32.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. JK2T-18D815-CL

Ford TRANSIT 12 Radio Stereo Head Unit JK2T-18D815-CL

€104.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 03L906018JR

Audi A4 B8 2.0 TDI CJCB 136HP Engine Control Unit Module ECU 03L906018JR Manual

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4E0910888E

Audi A4 B8 A5 8T Navigation Sat Stereo Radio Head Unit CD Player 4E0910888E

€28.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. H1BT-14B321-AH

Ford Fiesta Mk8 Air Control Unit Module ECU H1BT-14B321-AH

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. DG9T-14B534-BD

Ford Mondeo Mk5 Door Control Module Rear Left Right N/O/S DG9T-14B534-BD

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6824128

BMW F45 Mini F60 Hybrid High Voltage Cable Harnes 6824128

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A0035420219-3

Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue A0035420219

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7G9T-14B534-BC

Land Rover Freelander 2 L359 Rear Door Module Left Right N/O/S 7G9T-14B534-BC

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 95861200811

Porsche Cayenne S 92a Power Electronics Cable Wire Harness Loom 95861200811

€759.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5A61AA3

BMW X1 U11 Radio Remote Control Car Key Wireless BDC ECE ROW 5A61AA3

€7,599.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 1K0937503A

Audi TT 8J A3 8P Volkswagen Golf Mk6 Octavia Relay Fuse Box Panel 1K0937503A

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2135400200

Mercedes W205 W213 W238 Fuse Box Cover Control Unit Holder Bracket A2135400200

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. YWC107000LUM

Land Rover Discovery 2 L318 Ultrasonic Alarm Sensor Module YWC107000LUM

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8S0971104

Audi TT FY Rear Bumper PDC Cables Set Wiring Loom Harness 8S0971104

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6C4971693E

VW Volkswagen Polo 6R Rear Door Harness Wiring Loom Cable Left N/S 6C4971693E

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. CK52-14B079-FE

Range Rover L405 Centre Console Wiring Loom Harness Cables CK52-14B079-FE

€56.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. BJ32-14632-BC

Range Rover L538 Door Wiring Loom Harness Cable Rear Left N/S BJ32-14632-BC

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9217234

Module Bracket BMW X3 F25 X4 F26 Control Unit Holder Carrier 9217234

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8W0971030AF

Audi A4 S4 B9 Front Door Wiring Harness Loom Cable Passenger Side 8W0971030AF

€42.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6943835

BMW E90 E91 E60 E61 E64 CAS3 Module Control Unit 6943835

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9383063

Mini Cooper F55 F56 Navigation DAB Head Unit Sat Nav Professional 9383063

€233.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. KPLA-14D550-AA

Land Rover Range Rover Sport L494 Hybrid Battery Cooling Fan KPLA-14D550-AA

€51.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. CPLA-18D540-AA

Range Rover Vogue L405 Auxiliary Heater Control Module ECU CPLA-18D540-AA

€99.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8578495

Engine Wiring BMW F30 F31 330d F32 F36 430d N57N Loom Harness Cable 8578495

€66.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 7G92-14301-AE

Land Rover Freelander 2 L359 Battery Negative Earth Lead Cable 7G92-14301-AE

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2469000717

Mercedes C117 X156 All Wheel Drive Control Unit Module ECU MFA A2469000717

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9T11-12A650-HG

Ford Transit Connect Engine Control Unit ECU ECM Module 9T11-12A650-HG

€151.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. A2044401402

Mercedes W204 Parktronic Parking Distance Control Module Unit ECU A2044401402

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. AG91-12A650-TP

Ford Mondeo Mk4 2.2 TDCI KNBA 200HP Engine Control ECU AG91-12A650-TP Manual

€317.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 2K5959655B

Volkswagen Caddy Mk4 Air Control Unit Module ECU 2K5959655B

€75.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8582280-13

BMW F20 Engine Control ECU 117HP 116d N47N N47D20C 2.0 Diesel 8582280 Manual

€284.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 4L0959651

Audi A5 Q7 A6 Front Crash Impact Sensor Control Unit 4L0959651

€47.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9259581

BMW X3 F25 Map Card Fuse Box Grouping Diagram 9259581

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 9270354-1

Mini F55 F56 BMW F45 X1 F48 Rear Electric Power Distribution Fuse Box 9270354

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 6835346

Mini F60 Rear Door Harness Loom Cable Wiring Left Right N/O/S 6835346

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 5G0907451

Volkswagen Golf Mk7 Dashboard Sun Solar Sensor 5G0907451

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

Part no. 8K0971687Q

Audi A4 B8 Door Wiring Harness Cable Loom Rear Left N/S 8K0971687Q

€23.95

Free delivery: Aug 10 – 11

If paid before 14:00

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