Ignition system
* Spark plugs
* Ignition coils
* Ignition modules
*Distributors
* Spark plug wires
* Circuit and battery
Power system
* Fuel pump
* Fuel filters
* Fuel injectors
* Fuel pressure regulator
* Fuel line
* Fuel tank
Exhaust system
* Exhaust manifold
* Catalytic converter
* Silencers
* Exhaust pipe
* Oxygen sensor
Electrical system
* Battery
* Generator
* Starter
* Electrical wiring
* Relay
* Fuses
* Engine control unit (ECU)
Lighting system
* Headlights
* Tail lights
* Side lights
* Turn signals
* Fog lights
Dashboard
* Speedometer
* Tachometer
* Fuel level indicator
* Temperature indicator
* Indicator lights
Security system
*Hazard alarm
* Anti-lock braking system (ABS)
* Stability Control (ESC)
* Airbags
* Immobilizer
Comfort and convenience
* Audio system
* Air conditioner
* Window lifters
* Central locking
* Electric seats
Specialized systems
* Hybrid and electric systems
* Navigation systems
* Driver assistance systems
* Telematic systems