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 W204 Rear SAM Relay Control Unit Module A2049009501

£237.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8614302

BMW 1 Series F20 F21 114i N13 Engine Control Unit ECU Module DME 8614302 Manual

£275.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9249083

BMW E91 LCI Footwell Light Control Module LCM LED Basis 9249083

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8X0907357C

Audi TT 8J Headlight Head Light Lamp Range Control Unit Module ECU 8X0907357C

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7636292

BMW F20 F30 116i 316i N13 136HP Engine ECU Module DME 7636292 Manual

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-7549246

BMW 1 3 Series E87 E90 116i 316i Engine Wiring Loom Harness 7545163 7549246

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. R50-PARK-LANE

Mini R50 Park Lane Sticker Rear Window Decals Plates Set

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7490465-1

BMW F10 F20 F30 F31 Mini F55 F56 Front Heated Seat Control Module ECU 7490465

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2469009112

Control Unit Mercedes W176 W246 Body Control Module BCM ECU A2469009112

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2045403750

Mercedes W204 SAM Module Control Unit Electrical Fuse Box Unit A2045403750

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1648207926

Mercedes ML W164 Air Module SRS Control Unit ECU A1648207926

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8510591-3

BMW E81 E87 E90 LCI 120d 320d N47 ECU Kit DDE 8510591 CAS3 + Key Automatic

£199.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9215184

BMW E60 E87 E90 E91 Hands Free Electronics Charging Module MULF2 9215184

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2128203985

Mercedes W204 W212 Door Module Rear Left N/S Control Unit Module A2128203985

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7PP907283

Audi RS6 C7 Tire Tyre Pressure Monitor System Moduel Control Unit ECU 7PP907283

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9226331

BMW E87 LCI ECU Body Control Module Unit H2 9226331

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7621178-1

BMW E81 E87 LCI E90 N43 118i 318i ECU Kit DME CAS3 Key 7621178 Manual

£142.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 9159041

BMW E90 E91 E92 Professional CCC Navigation System Controller 9159041

£189.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9227752

BMW F20 F21 F22 F23 F30 F80 M3 F82 F36 Distributor B Multifuse 9227752

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8R0907468N

Audi A5 8T Gateway Control Module Unit ECU 8R0907468N

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9258350

Air Module BMW F20 F21 F22 F30 F31 F32 Control Unit ECU 9258350

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9069006503

Door Module Mercedes W906 Front Left Right N/O/S Control Unit ECU A9069006503

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2059008618

Mercedes W205 Module SRS Control Module Unit A2059008618

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129008224

Headlight Control Module Mercedes W207 W212 Unit A2129008224

£70.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2045421518

Mercedes W204 Negative Cable Battery Terminal Wiring A2045421518

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0035420819

Mercedes W176 W205 W213 W242 W447 W907 Relay 4-Pin Black Tyco Unit A0035420819

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229006008

Mercedes W205 W217 W222 Tailgate Trunk Control Module Unit A2229006008

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9346799

BMW F01 F02 LCI F10 Diversity Aerial Antenna Amplifier DAB 9346799

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2719060200

Mercedes W204 W211 W212 S212 Engine Starter Motor A2719060200

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1645453316

Mercedes ML W164 Parktronic Parking Control Unit Module A1645453316

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9241694

Wiring Harness BMW F10 F11 Front Bumper PDC Wiring Loom Cable 9241694

£32.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8509722-1

Control Unit Box BMW F20 F21 F22 F30 F31 Engine Ecu Cover 8509722

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9302256

BMW F10 F20 F30 Reversing Camera ECU Control Unit Module 9302256

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6858017

BMW F10 F11 LCI Control Unit EMF Module 6858017

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2475411000

Mercedes C118 W177 W247 Battery Box Tray Trim Housing Cover A2475411000

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7801158

BMW 3 5 X5 Series E60 N E70 E90 F30 Exhaust Lambda Probe Oxygen Sensor 7801158

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0025428819-1

Mercedes W176 W246 Relay Current 4 Pin 12V Hella A0025428819 Set x2

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7624412

BMW 1 3 Series F20 F21 F30 Cable Alternator Starter Base B Wire 7624412

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9251984

BMW F10 F11 F20 F21 F30 Control Unit Module Voltage Transformer VSU180 9233143

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9064401066

Mercedes Sprinter W906 W907 Positive Battery Cable Wiring A9064401066

£51.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9189200

BMW 1 3 Series E81 E87 E90 E91 E92 Radio Professional CD Audio Player 9189200

£142.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7188487

BMW E93 Convertible Battery Mounting Bracket Clamp Bolt Holder Mount 7188487

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6826984

Air Module BMW F20 F21 F30 F31 Control Unit 6826984 0285013630

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129008307

Mercedes W212 Fuse Box Control Unit Module SAM Relay Box A2129008307

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9130047

BMW E92 F32 E61 LCPA Seat Belt Module ECU

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129006624

Fuse Box Mercedes W204 Front Relay Control Unit Module SAM A2129006624

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8V0035874B

Audi A3 8V Multimedia Radio Sat Nav CD Player Head Unit 8V0035874B

£189.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 6942677

BMW E60 E61 E63 E65 PDC Parking Control Module Unit ECU 6942677

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9065450003

Fuse Cover Mercedes Sprinter W906 Box Trim Panel Lid Grey A6395450003

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9361145

Mini Cooper One R55 R56 R57 LCI R58 R59 CHAMP 2 Navigation 9361145

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6971370

BMW 1 3 X1 Series E81 E82 E84 E87 E90 E91 E92 Power Distribution Box 6971370

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9134707

BMW X5 E60 E61 E63 E64 E70 Control Unit Module Passive Go 9134707

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9365764

Head Unit BMW F10 F20 F22 F30 Navigation Sat Nav High Control Module 9365764

£104.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 8516246

BMW F10 LCI F20 F22 F30 F32 B37 Wiring Harness Engine Glow Plug Module 8516246

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9113064

BMW 5 Series E60 E61 LCI Centre Console Switch Cluster Control Unit ECU 9113064

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. RHD-6974666

BMW E84 E90 E91 Instrument Cluster Speedo Clocks Automatic 6974666

£28.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7160897

BMW X5 E53 E60 E61 E65 E81 E87 E90 E91 Turn Indicator Silver Bulb 7160897

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2075400340

Battery Fuse Box Mercedes W204 Control Unit Module SAM A2075400340

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8636064

Wiring Cable BMW F20 F30 LCI B48 Engine Injector Ignition Loom 8636064

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 1K0907530K

Audi A3 8P Central Gateway Control Unit Module Relay ECU 1K0907530K

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2048210851

Mercedes W212 Windscreen Rain Sensor Temperature Humidity Unit A2048210851

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9326010

Radio Player BMW F20 F21 F30 F31 CD DAB Bluetooth Head Unit Audio Player 9326010

£61.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8621840

BMW 1 3 Series F20 F21 F30 LCI Starter Motor Engine 8621840

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0055461240

Mercedes W169 W245 Distributor Box Front Control Unit Module A0055461240

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7457871

BMW 1 3 Series F20 F21 F30 LCI Headlight Control Unit Module FLE2 7457871

£75.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7574294

Mini Cooper S R56 Automatic Gearbox TCU ECU Control Unit EGS Module 7574294

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2128203485

Door Module Mercedes W204 W212 Front Left N/S Control Unit Module A2128203485

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8734748

Telematics Control Unit BMW F20 F31 LCI F32 Module ATM ECE 4G WLAN 8734748

£61.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049007408

Mercedes W204 Display Screen Information Navigation Dashboard A2049007408

£56.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049057501

Mercedes W204 W212 Dashboard Light Sun Solar Sensor Unit A2049057501

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A9065410400

Battery Bracket Mercedes Sprinter W906 W910 Mount Trim Holder A9065410400

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6929347-1

BMW 1 3 SERIES E82 E90 E92 Roof Antenna Aerial Shark Fin GPS Radio TeL 1682646

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-3451585

BMW X3 E83 Instrument Cluster Speedo Clocks Automatic 3451585

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7515206

Mini Cooper One R50 R52 Battery Alternator Starter Cable Wiring 7515206

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1648209385

Mercedes ML W164 Door Module Front Left N/S Control Unit Module A1648209385

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2188200187

Mercedes W221 Multimedia Interface USB Adapter Port Socket A2188200187

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A1769051000

Mercedes W176 Front Crash Impact Air Module Sensor Unit A1769051000

£23.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9261599

BMW F20 F21 F22 Rear Bumper PDC Ultrasonic Sensor Estoril Blue 2

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8X0959792H

Audi Q3 8U Door Module Front Door Left N/S Control Module 8X0959792H

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2229005118

Mercedes W205 Ambient Color Light Module ECU A2229005118

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. rhd-A2479007004

Mercedes W177 Dash Monitor Display Speedo Meter SAT NAV Screen A2479007004

£104.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9381114

BMW F20 F21 F30 F31 F32 Mini F56 F57 Seat Control Unit Module Heating 9381114

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8F0959255

Audi A5 8F Convertible Folding Roof Module Control Unit 8F0959255

£118.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9217004

Battery Cable Plus BMW X5 E70 E70N LCI X6 E71 Positive Pole 9217004

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 8512499

Engine Control Unit BMW E81 E87 E90 E91 LCI N47 Diesel ECU DDE 8512499

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2125405710

Mercedes W212 PDC Wiring Parktronic Parking Sensor Cable Rear A2125405710

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9134661

BMW E87 E90 E91 E92 Seat Control Unit Module ECU 9134661

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9267514

BMW F10 F11 F12 Central Gateway Module ECU Control Unit Lear ZGW-02 High 9267514

£37.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9273671

BMW 4 F33 Cabrio Convertible DAB Digital Radio Aerial Antenna Amplifier 9273671

£66.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9213373

Mini Cooper R57 Convertible Cabrio Petrol Fuse Box 9213373

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2049013502

Mercedes W204 S204 Airbag Module Air Bag SRS Control Unit ECU A2049013502

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2038270642

Mercedes-Benz CLC-Class CL203 Antenna Amplifier Rear Right O/S A2038270642

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7579142-13

BMW 1 3 Series E87 LCI E90 120i 320i Petrol ECU Kit N43 DME 7579142 CAS3 Key

£113.95

Free delivery: Aug 27

If paid before 14:00

Part no. A2129007104

Mercedes W212 SAM Module Control Unit Electrical Fuse Box Unit A2129007104

£142.95

Free delivery: Aug 28 – Sep 7

If paid before 14:00

Part no. 6809050

BMW F20 F30 Rear Electronic Module REM Fuse Box Control Unit V2 ECU 6809050

£18.95

Free delivery: Aug 27

If paid before 14:00

Part no. 6911024

BMW Z4 E85 E86 Battery Mounting Bracket Part Holder 6911024

£13.95

Free delivery: Aug 27

If paid before 14:00

Part no. 9149843

BMW E81 E87 LCI E90 Hands-Free Bluetooth Module High MULF2 9149843

£47.95

Free delivery: Aug 27

If paid before 14:00

Part no. 7492026-1

Headlight Control Unit BMW F20 F21 F30 LCI Module FLE2 7492026

£85.95

Free delivery: Aug 27

If paid before 14:00

Part no. A0009821923

Mercedes W205 Interior Trunk Fuse Box Automotive Pink Relay A0009821923 Red

£13.95

Free delivery: Aug 27

If paid before 14:00

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