Why is it important?
Air is drawn into the engine as a critical part of the combustion process. The engine air filter captures airborne contaminants such as dirt, dust and even bugs before they can enter the engine. A dirty, clogged engine air filter can contribute to poor overall engine performance.
The air filter should be replaced approximately every year depending upon mileage, weather conditions and visual inspection. By not replacing a dirty air filter a vehicle will not achieve optimal mpg.