Premium Guard PC5516 Cabin Air Filter Premium Guard PC5516 Premium Guard Cabin Air Filter Keeps particles like pollen, diesel soot, and tire dust away from the interior of the vehicle High Filtration Performance maximizing filtration area with no affect to free flow of air Eliminates the musty smell developing from a failing filter Eliminates approximately 100% of exhaust pollutants and contaminants and improves air quality for drivers and their passengers