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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BMW F74 Gran Coupé FDR High REDE Control Unit ECU Front Driver Door 5B79167

€180.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A9068204126

Mercedes Sprinter W906 Door Module Front Right O/S Control Unit A9068204126

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2139008013

Bluetooth Module Mercedes W176 W213 Control Unit Hands Free A2139008013

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7542934-1

BMW E60 E61 E65 N62N Petrol Alternator Generator 180A 14V 7542934

€89.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 3M5T-19E663

Ford Kuga C394 Mk1 Sun Solar Light Sensor Control Unit 3M5T-19E663

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7L0971771B

Volkswagen Touareg 7L Gear Selector Switch Harness 7L0971771B

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. HPLA-14301-AC

Range Rover Sport L494 Negative Battery Cable Wiring Loom HPLA-14301-AC

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2229002308

Mercedes W205 S205 W222 Door Control Module ECU Rear Right O/S A2229002308

€47.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5Q4959593R

Seat Leon Cupra Mk3 Front Door Control Module Unit Driver Side 5Q4959593R

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2218201875

Mercedes W221 Aerial Antenna Control Unit Keyless Go Entry Module A2218201875

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7248911-1

BMW F20 F21 F22 F30 F31 Fog Light Lamp Wiring Harness Plug Left N/S 7248911

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7P0937548J

Porsche Cayenne 92A Fuse Box Module Hybrid 7P0937548J

€89.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4F0971687A

Audi A6 C6 Door Window Motor Wiring Cable Loom Front Right O/S 4F0971687A

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 3455306

Mini R57 Cabrio Convertible DWA Alarm System Relay ECU 3455306 65753455306

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5Q0959655BD

Audi A3 8V Air Module Control Sensor SRS System ECU Unit 5Q0959655BD

€156.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8T8971029K

Audi A5 S5 8T Door Wiring Loom Harness Cable Wire Front Right O/S 8T8971029K

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7P5971225B

Porsche Cayenne 92A Positive Battery Cable Wiring 3.0 Diesel 7P5971225B

€47.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1175401500

Mercedes X117 Front Door Wiring Harness Loom Cable Right O/S A1175401500

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 83A945093D-2

Audi Q3 F3 Rear Tail Light Lamp LED Wiring Harness Cable Left N/S 83A945093D

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 3C8035279S

VW Volkswagen Passat CC Multimedia Stereo Radio CD Player Head Unit 3C8035279S

€161.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5NA945207C-2

VW Volkswagen Tiguan Mk2 Rear Tail Light LED Wiring Left Nearside N/S 5NA945207C

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 3B0972722

Audi A1 8X A3 S3 RS3 8P 8V A6 S6 C7 Lumbar Support Harness Loom Wire 3B0972722

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. BK2T-14B446-AD

Ford Transit Custom Mk1 Front Panel Catch Cable Wiring Harness BK2T-14B446-AD

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5WB959107B

Audi Q2 GA Rear Boot Trunk Lid Tailgate Control Unit Module ECU 5WB959107B

€70.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7P0941828B

Volkswagen Touareg 7P 3.0 TDI Fuse Box Control Module 7P0941828B

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. AA6557903HQ

Ford Mustang Mk6 Headlight Module Control Unit ECU AA65-57903-HQ

€47.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8W1959595

Audi Q5 FY Rear Door Control Module Unit Left Right N/O/S 8W1959595

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0009057302

Windscreen Camera Mercedes W204 W212 Front Windshield Camera Unit A0009057302

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6929554

BMW E65 E66 Door Air Module Sensor Control Unit Front Right O/S 6929554

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9468429

BMW F45 LCI Battery Cell Module Supervision Circuit Control Unit 225xe 9468429

€170.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8714773

BMW 5 G30 F90 M5 Door Wire Cable Harness Loom Wiring Front Driver's Side 8714773

€85.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. FK72-14633-BCD

Land Rover Discovery Sport L550 Door Wiring Rear Left N/S FK72-14633-BCD

€75.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8044501

BMW F06 F10 F12 F13 LCI Fuel Injectors Wiring Loom Harness Cyl 1-4 S63N 8044501

€75.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5K0907159A

Volkswagen Golf Mk6 Impact Sound Control Module Unit 5K0907159A

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8K0907297A

Audi S5 8T Parking Aid PDC ECU Control Unit Bracket Holder Retainer 8K0907297A

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4K0915459F-1

Audi A6 C8 Power Disctribution Control Module 4K0915459F

€51.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9365212

BMW X5 F15 Door Light Wiring Harness Cable Loom Front Left Right N/O/S 9365212

€89.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2709002100-1

Mercedes W176 W246 A180 B180 BlueEFFICIENCY 270.910 122HP Engine ECU A2709002100

€332.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2045450003

Mercedes W204 Fuse Box Battery Starter Cable Cap Cover Top Lid A2045450003

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1765400103

Battery Cable Mercedes C117 W176 Starter Alternator Wiring Harness A1765400103

€75.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6980177

BMW X1 X3 X5 X6 Z4 Z8 Relay Changeover Function Green 6980177

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5J0951172

Skoda Fabia 5J Interior Roof Alarm Sensor Ultra Sonic Module 5J0951172

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2129061703-2

Mercedes S212 Rear Tail Light Lamp Wiring Harness Outer Left N/S A2129061703

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8635813

Engine Wiring BMW F20 F30 F31 LCI B38 Valvetronic Servomotor Cable Loom 8635813

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5S6Y-19G229-AB

Ford Fiesta St Mk5 Alarm Siren Horn 2.0 DURATEC ST150 N4JB 5S6Y-19G229-AB

€94.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9152262

BMW X5 E70 X6 E71 Front Crash Impact Sensor Module 9152262

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. LR133289

Range Rover Sport L494 Transfer Box Wiring Harness 3.0 Diesel LPLA-13N850-BB

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. DK52-14B673-AC

Range Rover Vogue L405 Upper Tailgate Control Module Unit DK52-14B673-AC

€42.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9V4N-12A650-BG

Ford Kuga C394 Engine Control Unit ECU 200HP 2.5 Petrol 9V4N-12A650-BG Automatic

€332.95

Free delivery: Jul 29 – Aug 3

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: Jul 29 – Aug 3

If paid before 14:00

Part no. A6561593100

Mercedes W213 OM656 Diesel Engine Wiring Guide Cable Duct A6561593100

€28.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2469008516

Parking Brake Module Mercedes W176 W246 Electric Control Unit ECU A2469008516

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8509722-2

Control Unit Box BMW F20 F21 F22 F30 F31 Cover Panel Protection 8509722

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2129063001-1

Radio Head Unit Mercedes W212 Command Navi CD DVD Player Navigation A2129063001m

€161.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. FW93-14F012-BD

Land Rover Discovery Sport L550 Tyre Pressure Control Module FW93-14F012-BD

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7P5971363CL

Porsche Cayenne S 92A Seat Wiring Harness Cable Loom Front Left N/S 7P5971363CL

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7537612

BMW X5 E53 E60 E81 E87 E90 Engine Vacuum Control Electric Valve 7537612

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 2225618

Ford Transit Custom Mk1 Engine Starter Motor 2.0 EcoBlue GK2T-11000-AB

€66.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6953424-2

BMW Z4 Series 2 E85 E86 Positive Battery Cable Plus Pole Lead 6953424

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8K9035225

Audi RS4 B8 Radio Aerial Antenna Amplifier AM/FM 8K9035225

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1635400382

Mercedes ML W163 Fuse Relay Box ECU Cover Trim A1635400382

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7521582-2

BMW 3 X3 Z4 Series 2 E46 E83 E85 Engine Electronics Unit Box 7534922

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8V0971228

Audi RS3 8V 2.5 TFSI Quattro Starter Motor Battery Cable Wiring 8V0971228

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 98764710500-1

Porsche Cayman 987 Antenna Aerial Amplifier Radio Booster 98764710500

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 1T0035530

VW Volkswagen Touareg 7L Antenna Aerial Amplifier Booster Unit 1T0035530

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4M0971227CB

Audi Q7 4M 3.0 TDI Battery Earth Cable Lead Negative Wiring 4M0971227CB

€37.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2048701826

Mercedes S204 Door Module Front Left N/S Control Unit ECU A2048701826

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7798875

BMW X5 Series E70 LCI Ventilation Grommet Unit Box Cover 7798875

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A2055457200

Mercedes W205 Radio Stereo Head Unit Mount Bracket Holder Support A2055457200

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0025421219

Mercedes W168 W203 W211 Relay 6-Pin Black Tyco A0025421219

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. CK52-14F641-AF

Range Rover L405 Digital TV Tuner Control Module Unit CK52-14F641-AF

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9137804

Mini Cooper One R55 R56 R57 R58 R59 Drivers Door Wiring Harness Loom 9137804

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. EB3G-12B508-BB

Ford Ranger Mk3 Fusebox Bracket Fuse Box Panel Tray Mount EB3G12B508BB

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9327318

BMW 1 2 3 4 5 F10 F20 F22 F30 F32 Navigation Sat Nav DAB Head Unit High 9327318

€237.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A6395400150

Mercedes Vito W639 Battery Terminal Fuse Box Control Unit Module A6395400150

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. BJ32-14C249-AB

Range Rover Evoque L538 Seat Control Module Unit ECU BJ32-14C249-AB

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9812297

Mini R55 R56 R57 Air Module ECU Control Unit Module 9812297

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8K1907115A-1

Audi A4 B8 1.8 TFSI CABB 160HP Engine Control Module Unit ECU 8K1907115A Manual

€80.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5A8E799

BMW G20 Radio Multimedia Satellite Navigation Head Unit 5A8E799

€284.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8691838-1

Mini F54 F55 F57 B48 136HP Petrol Engine Control ECU Kit DME 8674258 Manual

€284.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8U0919603

Audi Q3 8U Multimedia MMI Head-Up Display Screen 6" RMC Sat Nav 8U0919603

€123.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 03G906056S-2

Audi A3 8P 1.9 TDI BLS 105HP Engine Control Unit ECU Kit 03G906056S Manual

€113.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A9066800214

Mercedes Sprinter W906 Radio Fan Adapter Cooling Control Unit Module A9066800214

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. JK2T15K868AB

Ford Transit Custom Rear Bumper PDC Cables Wiring Loom Harness JK2T-15K868-AB

€47.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7634061

BMW F10 Engine Transmission Module Cable Loom Wiring Harness 7634061

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. YDB500290

Land Rover Discovery 3 L319 Windscreen Rain Sensor ECU Control Unit YDB500290

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1779059402

Mercedes W177 Remote Car Key Electronic A1779059402

€94.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 5A0FAD6

BMW i4 G26 Hybrid Electric Earth Ground Cable Negative Battery Lead 5A0FAD6

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 95863109602-2

Porsche Cayenne 92A Rear Tail Light Lamp Cable Wire Plug Right O/S 95863109602

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6953424-3

BMW Z4 E85 E86 Positive Battery Cable Plus Pole Lead 6953424

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 6842986

BMW F20 F30 F31 Mini F55 F56 F60 Control Unit Air Conditioning Module 6842986

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1779002510

Mercedes W177 W247 Safety Module Air Module SRS Control Unit ECU A1779002510

€142.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A0061514401

Starter Motor Mercedes W204 W211 W212 OM642 Diesel Engine A0061514401

€56.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 8K0907279D

Audi A5 8T Gateway Convenience Body Module Control Unit ECU 8K0907279D

€32.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 4F1971035N

Audi A6 C6 Front Driver Side Door Wiring Harness Loom Cable 4F1971035L

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 9165623

BMW X5 X6 Series E70 E71 Airbag Control ECU Unit Module 9165623

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 7N0971845

Seat Alhambra 7N Control Unit Module Bracket Mount Holder Support 7N0971845

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. A1638200456

Mercedes W16 Spare Wheel Carrier Additional Brake Light Stop Lamp A1638200456

€94.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

Part no. 3C0035711A

VW Volkswagen Passat B7 Hands Free Microfon Cable Wiring 3C0035711A

€23.95

Free delivery: Jul 29 – Aug 3

If paid before 14:00

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