A cabin air filter is used to clean incoming air for the car’s HVAC system.  The cabin air filter helps trap pollen, bacteria, dust, and exhaust gases that may find their way into a vehicle’s ventilation system, making the interior of the car a healthier place.

Cabin air filters should be replaced according to owners’ manual guidelines, usually every 15,000 miles. It’s not uncommon, however, for cabin air filter replacement to be overlooked in the owner’s manual.