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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Mercedes W212 Fuse Box Control Unit Module SAM Relay Box A2129008307

€47.95

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Part no. 6958526

BMW 5 X5 X6 Series E60 E61 E70 E71 F07 F10 F11 Seat Adjustment Switch Right O/S

€23.95

Free delivery: Sep 14 – 15

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Part no. 8506375

BMW 1 3 Series E81 E87 E90 E91 LCI N47 Diesel ECU DDE engine control 8506375

€32.95

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Part no. 2K0971557AG

Volkswagen VW Caddy Door Harness Loom Cable Wiring Front Left 2K0971557AG

€23.95

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Part no. 8573260-2

BMW F20 F21 116d ed Diesel N47N 116HP Engine Control Unit DDE 8573260 Manual

€47.95

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Part no. A2469000012-1

Mercedes W176 W246 Radio Head Unit COMAND Navi Player Control Unit A2469000012

€94.95

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Part no. A4159066000

Starter Motor Mercedes W415 Citan OM607 OM608 Diesel Engine Starter 233006508R

€37.95

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Part no. 9174269-1

BMW F07 F10 F11 Speakers Amplifier Bracket Holder Mount Unit Module 9174269

€23.95

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Part no. 9111165-PB2

PDC Sensor BMW E81 E82 E87 E88 E90 E91 Ultrasonic Parking SET X4 Platinbronze

€51.95

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Part no. A0009067902

Mercedes W204 S204 C204 Alternator Generator 150A 14V 1.8 Petrol A0009067902

€37.95

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Part no. CK52-14C676-AA

Range Rover L405 Sensor Air Module Impact Crash Sensor CK52-14C676-AA

€23.95

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Part no. A4479050004

Mercedes Vito W447 Negative Battery IBS Cable Wiring A4479050004

€32.95

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Part no. 8473167

BMW F30 F31 F32 LCI 330dX N57N Engine Gearbox Module Wiring Cable Loom 8578498

€28.95

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Part no. 8T0959792H

Door Module Audi A5 8T A4 B8 Control Front Left N/S Unit 8T0959792H

€23.95

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Part no. 3C0919275S-CGR

Audi TT 8J PDC Parking Distance Sensor Control Condor Grey - Y7E 3C0919275S

€23.95

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Part no. 9264974

BMW E81 E82 E87 E88 E90 E91 Front Seat Control Module 9264974

€47.95

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Part no. A2075401102

Mercedes W207 A207 C207 Loudspeaker Cable Wiring Loom Harness

€23.95

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Part no. 3G0919605D

VW Volkswagen Golf Mk7 Multimedia MMI Sat Nav Radio Display Screen 3G0919605D

€42.95

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Part no. 9255135

BMW E81 E87 E90 E91 PDC Parking Sensor Front Rear Mineralgrau Mineral Gray B39

€23.95

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Part no. 6930006

BMW X5 3 Series E70 E90 Clamping Ring B+ Transition Battery Cable 6930006

€23.95

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Part no. A1679050700

Mercedes W177 Crash Impact Sensor Front Door Left Right Unit A1679050700

€23.95

Free delivery: Sep 14 – 15

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Part no. 8678962

Mini Cooper S F55 F56 F57 Petrol Injector Wiring Cable Loom Harness 8678962

€37.95

Free delivery: Sep 14 – 15

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Part no. 9269956

BMW X1 Series E84 Cable Loom Door Passenger Side Wiring Harness 9269948

€23.95

Free delivery: Sep 14 – 15

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Part no. 1Z0971120FQ

Skoda Octavia II Door Wiring Cable Harness Loom Front Driver's Side 1Z0971120FQ

€42.95

Free delivery: Sep 14 – 15

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Part no. A2059006413

Door Module W205 Rear Right O/S Door Control Unit Module ECU A2059006413

€23.95

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Part no. 7075907

BMW Z4 E85 Left N/S Contact Bush 7075907

€23.95

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Part no. A2124404851

Mercedes W212 Rear Bumper PDC Wiring Parking Sensor Loom Harness A2124404851

€32.95

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Part no. 1K0971250AH

VW Golf Mk5 V Negative Battery Terminal Cable Wiring 1K0971250AH

€23.95

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Part no. 9287530

BMW 1 Series F20 Control Unit Air Conditioning A/C Module 9287530

€23.95

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Part no. A0009002720

Mercedes Sprinter W907 Parking Control Unit Module Sensor Parktronic A0009002720

€70.95

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Part no. 8639583

BMW F20 F21 F30 LCI M140i 340i B58 Wiring Harness Motor Sensorsystem Module

€208.95

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Part no. 8741637

BMW X1 F40 F48 Mini F55 F56 F57 F60 Earth Cable Battery Cable 8741637

€23.95

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Part no. A1725400950

Mercedes SLK R172 Relay Fuse Box Control Unit A1725400950

€37.95

Free delivery: Sep 14 – 15

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Part no. 6954130

BMW 1 3 Series E87 E90 E92 Front Seat Adjustment Switch Right O/S 6954130

€23.95

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Part no. 8581872

Engine Wiring BMW F10 F11 N57Z Diesel Gearbox Loom Module Harness 8581872

€42.95

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Part no. A2439000800

Drivetrain Module Mercedes H243 Transmission Control Unit ECU A2439000800

€161.95

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Part no. 9264973-1

BMW X5 E70 Seat Control Unit Module ECU 9264973

€47.95

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Part no. 4F0959792T

Audi A6 C6 Front Left N/S Door Lock Control Module Unit ECU 4F0959792T

€23.95

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Part no. A0009822112

Energy Distributor Mercedes W205 W238 Power Control Unit Module A0009822112

€23.95

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Part no. 9176884

BMW E93 ECU Body Control Module H3 Junction Box 61359176884 9176884

€32.95

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Part no. 8200587119

Renault Trafic III Vauxhall Vivaro B Relay 5-Pin Grey Unit 8200587119

€23.95

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Part no. 8R0907468C

Audi A5 8T 2.0 TDI Gateway Control Module Unit ECU 8R0907468C

€23.95

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Part no. 8510221-18

BMW E90 E91 E92 LCI 325d N57 204HP ECU Engine Module DDE 8510221 Automatic

€42.95

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Part no. 6839821

Battery Cable BMW G01 G02 F97 F98 Positive Plus Pole Lead L= 712MM 6839821

€75.95

Free delivery: Sep 14 – 15

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Part no. 9367837

Air Module BMW F45 X1 F48 Mini F54 F55 F56 Air Control Unit ECU 9367837

€170.95

Free delivery: Sep 14 – 15

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Part no. A2469002616

Mercedes W176 W246 PDC Parking Distance Sensor Control Unit Module A2469002616

€56.95

Free delivery: Sep 14 – 15

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Part no. 7M0951253C-3

VW Volkswagen Audi Seat Skoda Relay Black Control 5 Pin 12V 7M0951253C Set X2

€23.95

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Part no. 5Q0959435A

Volkswagen Golf CD1 Keyless Go Module ECU Entry Control Unit 5Q0959435A

€23.95

Free delivery: Sep 14 – 15

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Part no. 7599378

Transmission Wiring BMW F20 Petrol N55 Automatic Gearbox- Engine Harness 7599378

€66.95

Free delivery: Sep 14 – 15

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Part no. 8T0907468P

Audi S5 8T Gateway Control Unit Module ECU 8T0907468P

€23.95

Free delivery: Sep 14 – 15

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Part no. 8T0035785A

Audi A5 8T MMI Multimedia Interface Unit Module Control ECU 8T0035785A

€23.95

Free delivery: Sep 14 – 15

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Part no. 6909235

BMW Z4 Series E85 E86 Petrol Pressure Hose Compressor Condenser 6909235

€32.95

Free delivery: Sep 14 – 15

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Part no. 6801509

Wireless Charger BMW F90 M5 G30 Centre Console Phone Module Unit 6801509

€89.95

Free delivery: Sep 14 – 15

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Part no. A2118203375

Antenna Booster Mercedes W211 Rear Boot Lid Tailgate Amplifier A2118203375

€23.95

Free delivery: Sep 14 – 15

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Part no. A2215400205

Mercedes W221 Brake Pad Wear Indicator Sensor Front Left Right N/O/S A2215400205

€23.95

Free delivery: Sep 14 – 15

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Part no. A0009068706

Mercedes W205 C43 Alternator Generator VALEO 200A 3.0 Petrol A0009068706

€113.95

Free delivery: Sep 14 – 15

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Part no. 5Q0937084DC

Audi A3 RS3 8V Body Control Module BCM Control Unit ECU Power Supply 5Q0937084DC

€47.95

Free delivery: Sep 14 – 15

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Part no. 9371789

BMW F20 F21 F30 F31 Bluetooth Teleservices GPS Telematics Module 9371789

€23.95

Free delivery: Sep 14 – 15

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Part no. A2049004306

Mercedes W204 Navigation CD Player COMAND Radio Sat Nav Head Unit A2049004306

€42.95

Free delivery: Sep 14 – 15

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Part no. 9196591

BMW E88 Cabrio Convertible Folding Top Roof ECU Module CVM6 9196591

€23.95

Free delivery: Sep 14 – 15

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Part no. 02T911023R

VW Polo 6R Seat Ibiza Mk4 Starter Motor Bosch 1.2 Petrol CGPB 02T911023R

€23.95

Free delivery: Sep 14 – 15

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Part no. 5WA937615

Audi A3 S3 8Y Fuse Box Control Module Relay Box Electrical Unit 5WA937615

€23.95

Free delivery: Sep 14 – 15

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Part no. 8U0907468Q

Audi Q3 8U Gateway Control Module Unit ECU 8U0907468Q

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9291731

BMW F10 Seat Wiring Cable Front Right O/S Electrical Loom Harness 9291731

€23.95

Free delivery: Sep 14 – 15

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Part no. A1635402333

Mercedes-Benz M ML W163 Centre Console Wiring Harness Cable Loom A1635402333

€23.95

Free delivery: Sep 14 – 15

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Part no. 6941485

BMW X5 X3 E53 E83 Control Module Unit Sliding Lifting Roof

€23.95

Free delivery: Sep 14 – 15

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Part no. A2075400440

Mercedes-Benz E-Class A207 Additional Battery Tray Holder Mounting Bracket

€23.95

Free delivery: Sep 14 – 15

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Part no. 8T0907468H

Audi A4 B8 Gateway Interface Control Module Unit ECU 8T0907468H

€23.95

Free delivery: Sep 14 – 15

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Part no. 7843349

BMW F10 F11 LCI M5 F06 F13 M6 S63N Cable Alternator Starter Base B+ 7843349

€28.95

Free delivery: Sep 14 – 15

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Part no. 8K0959792S

Audi A4 B8 Front Door Control Module Unit ECU Passenger Side 8K0959792S

€23.95

Free delivery: Sep 14 – 15

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Part no. 8K0959793H

Audi A4 B8 A5 8T Door Module Control Front Unit ECU 8K0959793H

€32.95

Free delivery: Sep 14 – 15

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Part no. 4K0906121D

Audi A4 B9 A5 F5 A6 C8 Fuel Pump Control Pump Unit Module ECU 4K0906121D

€70.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9241005

BMW 3 Series E90 LCI Footwell Light Control Module LCM LED Basis 9241005

€37.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 9115107-1

BMW X5 Series E70 E70N LCI Wiring Set Wash Water Container Cable Loom 9115107

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 022906032BE

VW Touareg 7L 3.2 V6 Petrol 220HP Module ECU Control Unit 022906032BE Automatic

€165.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 6906606

Mini Cooper One R50 R52 R53 Fuse Box Electrical Unit Cover Cap Black 6906606

€23.95

Free delivery: Sep 14 – 15

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Part no. 8T0862335F-1

Audi A4 B8 Bluetooth Multimedia Interface Control Module Unit ECU 8T0862335E

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5Q0937615C-2

Seat Leon Mk3 5F Fuse Relay Box Module Electrical Control Unit 5Q0937615C

€23.95

Free delivery: Sep 14 – 15

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Part no. 3M5T-14B006-AD

Land Rover Freelander L359 Sensor Front Impact Crash Sensor 3M5T-14B006-AD

€23.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 420919275

Audi A4 B8 A5 8T Rear Bumper PDC Sensor Parking Distance Control 420919275

€23.95

Free delivery: Sep 14 – 15

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Part no. 8509036-8

BMW E90 E91 335d M57N2 286HP Engine ECU DDE Kit CAS3 + Key Fob 8509036 Automatic

€569.95

Free delivery: Sep 14 – 15

If paid before 14:00

Part no. 5G0971104D

VW Volkswagen Golf Mk7 Wiring Loom PDC Rear Harness Parking Sensor 5G0971104D

€23.95

Free delivery: Sep 14 – 15

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Part no. 1J0906381B

Audi TT 8N Fuse Box Relay Control Unit Module 1J0906381B

€23.95

Free delivery: Sep 14 – 15

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Part no. 6799887

Crash Module BMW F01 F02 LCI F10 F11 F13 ICM Control Unit ECU 6799887

€23.95

Free delivery: Sep 14 – 15

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Part no. A9079008805

Mercedes Sprinter W907 W910 Head Unit Multimedia Controller Module A9079008805

€80.95

Free delivery: Sep 14 – 15

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Part no. A2129060105

Fuse Box Mercedes W212 Rear SAM Relay Control Unit Module A2129060105

€37.95

Free delivery: Sep 14 – 15

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Part no. 90494959

GM Vauxhall Opel Relay 4-Pin Multi Use Glow Plug Unit Magenta 90494959

€23.95

Free delivery: Sep 14 – 15

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Part no. 8R0907468L

Audi A5 8F Gateway Control Unit Module ECU 8R0907468L

€23.95

Free delivery: Sep 14 – 15

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Part no. 8W8035225D

Audi A5 F5 Radio Aerial Antenna Amplifier Left Upper N/S 8W8035225D

€32.95

Free delivery: Sep 14 – 15

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Part no. 4L0910289K

Audi Q7 4L Body Control Comfort Unit Module BCM Unit ECU 4L0907289K

€237.95

Free delivery: Sep 14 – 15

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Part no. 9383182

BMW F20 F21 F22 F30 F31 F32 F36 Body Control Module Unit FEM LR01 9383182

€199.95

Free delivery: Sep 14 – 15

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Part no. 5Q0951605B

Audi Seat Skoda Volkswagen Golf Mk8 Anti Theft Alarm Siren 5Q0951605B

€23.95

Free delivery: Sep 14 – 15

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Part no. 5WA035741B

Volkswagen Golf CD1 Antenna Amplifier Transmitter Receiver Module ECU 5WA035741B

€51.95

Free delivery: Sep 14 – 15

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Part no. 8574091

BMW F10 F11 520d N47N 184HP Engine Control Unit ECU DDE 8574091 Automatic

€85.95

Free delivery: Sep 14 – 15

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Part no. 6911038

BMW E46 X5 E53 Air Module Side Impact Crash Sensor Bosch 6911038

€23.95

Free delivery: Sep 14 – 15

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Part no. 7527610

Mini Cooper R50 W10 116HP Petrol Engine Control Unit ECU DME 7527610 Automatic

€23.95

Free delivery: Sep 14 – 15

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Part no. 5Q0906121R

Seat Alhambra 7n Fuel Pump Control Unit ECU Module 2.0 TDI 5Q0906121R

€37.95

Free delivery: Sep 14 – 15

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Part no. A0131547002

Mercedes W211 CLS C219 Alternator Generator OM642 Diesel 14V 180A A0131547002

€99.95

Free delivery: Sep 14 – 15

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Part no. A1179009200

Mercedes W176 Air Module Belts System Control Unit ECU Bosch A1179009200

€70.95

Free delivery: Sep 14 – 15

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