Luber-finer CAF1844P Cabin Air Filter Traps many harmful pollutants and allergens before they reach the cabin benefiting all passengers, especially those with allergies Removes up to 99.5 percent of allergens including dust and pollen Can easily be changed in most applications Meet form, fit, and function characteristics for the application Luber-finer recommends that cabin air filters be changed every 18,000 miles or once a year