Champion CCF1816 Activated Carbon Replacement Cabin Air Filter Activated carbon enhanced media eliminates odors inside vehicles Filters 98% of airborne contaminants passing through vehicles air conditioning, heating & ventilation system Installation sheets included in every replacement filter package Filter can be used on models of Lexus, Pontiac, Scion, Subaru and Toyota Replacement interval: 12 months or 12,000-18,000 miles