Unit 1 Engine Construction and Operation Principle Unit 2 Fuel System of the Electronically-Controlled Engine Unit 3 Engine Cooling System Unit 4 Engine Lubrication System Unit 5 Clutch Unit 6 Transmission (Including Automatic Transmission) Unit 7 Steering System Unit 8 Braking System Unit 9 Ignition System Unit 10 Battery, Lights and Signal System Unit 11 Car Maintenance ( I ) Unit 12 Car Maintenance ( II )