Detailed Notes: Is your vehicle equipped with a cabin filter? Cabin filters are generally found in one of two locations: under the hood, or under the dash board. Recommended replacement is every 12,000 to 15,000 miles, or once a year. Cabin filter Benefits: Particulate Filters; Activated Charcoal Filters with 5-Layer Design = Max Performnc & Durability, Capturing larger contaminants and particles; Absorbs toxic & foul-smelling gases such as ozone, nitrogen oxide, suphur dioxide & hydro-carbons.