Power supply system
* Batteries
* Generator
* Starter
* Fuses and relays
* Cable harness
Lighting
* Low and high beam headlights
* Direction indicators
* Brake lights
* Side lights
* Fog lights
Instrument panel
* Speedometer
* Tachometer
* Fuel level indicator
* Engine temperature gauge
* Voltmeter
* Warning board
Communications
* Radio communication
* GPS navigation
*Bluetooth
Security systems
* Anti-lock braking system (ABS)
* Traction Control System (TCS)
* Stabilization system (ESP/ESC)
* Tire pressure sensors
Engine
* Engine Management System (ECM)
* Temperature and pressure sensors
* Injectors and spark plugs (for diesel engines)
Transmission
* Electronic gear shift (for automatic transmissions)
* Speed and position sensors
Brake system
* Brake system control units (EBS/ABS)
* Wheel speed sensors
* Electronic parking brake
Pneumatic system
* Compressor
* Air receivers
* Pressure and humidity sensors
Hydraulic system
*Hydraulic pump
*Hydraulic cylinders
* Pressure and temperature sensors
Body
* Electric windows and mirrors
* Central locking
* Cabin lift control
Trailers
* Electrical connection between truck and trailer
* Lighting
*Brake system
*Alarm