Air filters can be easily overlooked. They often don't get replaced until they are absolutely clogged with dirt and soot. If these dust particles allowed to get inside the engine, even in microscopic sizes, they can damage pistons, cylinder walls and and all other moving parts of the engine...
A clogged air filter generates :
· An increase in the pressure drop during engine air intake
· Combustion problems (unbalanced air to fuel ratio).
· Drop in vehicle performance.
· Increase in polluting gas emission and unburned fuel.