The engine air filter is typically a paper element that reduces harmful dirt particles from entering the engines air intake system where they may cause engine damage.

Engine and Cylinder Head Covers are made from plastic both as part of an intake system and separately as a functional or design part. These cylinder head covers seal the oil-pressurized camshaft space externally. The main functions include sealing the crankcase, protecting the valve train and covering peripheral parts.

The main purpose of engine control system is to allow the engine to perform at maximum efficiency for a given condition. It controls various aspects of an internal combustion engine's operation. It also determines the quantity of fuel, ignition timing and other parameters by monitoring the engine through sensors. These sensors can include, MAP sensor, throttle position sensor, air temperature sensor, oxygen sensor and many others.