Prius Engine Air Filter 2004 2005 2006 2007 2008 2009 All Models This High Quality Engine Air Filter Protects Your Engine and Improves Engine Performance and Gas Mileage. Toyota Recommends Regular Replacement of Engine Air Filters to Ensure Top Performance and Mileage Premium Quality Aftermarket / Top Manufacturer / Direct-Fit / New In Box Fits ALL MODELS of the Toyota Prius 2004 2005 2006 2007 2008 2009 including Touring Very Easy to Change - see our images. Save Money versus Dealer Parts / Labor