****Note: Vehicles listed below were NOT factory equipped with a Cabin Air Filter - filter only fits vehicles with dealer Installed Cabin Air Filter retrofit kit - verify presence of filter in vehicle before filter purchase Bosch HEPA Premium Cabin Air Filters are designed and tested to meet High Efficiency Particulate Air (HEPA) standards based on ISO 29463-3:2011 and provide filtration efficiency of 99.97% at 0.3 microns This efficiency provides ultimate protection in trapping particulates that can enter your vehicle and provides the cleanest air possible for you and your family Melt-blown electrostatic layer and very dense media provide greater trapping capabilities; Additional static cotton layer added to the HEPA media provides higher capacity Bosch HEPA Cabin Air Filters provide true clean air for enhanced respiratory health without an added chemical odor neutralizer; Cabin air filters should be replaced at least once every 12 months (or every 12K miles) Compatible with select vehicles equipped with dealer installed Cabin Air Filter retrofit kit (verify specific fitment details with AmazonConfirmedFit fit checker above): FORD: 1997-03 Expedition, 1997 F Super Duty, 1997-04 F-150, 2004 F-150 Heritage Compatible with (continued): FORD: 1997-99 F-250, 1999-03 F-250 Super Duty, 1997 F-350, 1999-03 F-350 Super Duty, 1999-03 F-450 Super Duty, 1999-03 F-550 Super Duty; LINCOLN: 2002 Blackwood, 1998-04 Navigator