Your vehicles engine Air Filter is used to filter air that is drawn into the engine, when you service your vehicle such as an oil change have them check your Air Filter, if it isn't dirty at the time have the shake it out to remove sand and particles. If your Air Filter become dirty, wet or clogged it can keep your engine from running properly. The is constant suction through the Air Filter keeps debris and particles out of the engine which can cause damage with prolong build up. Filters should be changed at least every 10,000 miles.
Cabin Air Filter
Cabing Air Filters should be changed every 24,000 to 30,000 miles.