1. Engine:
1.1 Engine Lubrication System 1.2 Engine Cooling System 1.3 Fuel System 1.4 Exhaust System
1.5 gas distribution system 1.6 ignition system 1.7 starting system 1.8 engine management system
2. The gearbox:
2.1 manual gearbox
2.2 automatic gearbox
3. Transmission system: engine and transmission
4. Car interior