What is the difference between an air filter and cabin air filter? An air filter is a screen that essentially removes solid particles that can be harmful to humans. Particles such as dust, powder, pollen, mold, fibers, and germs. It cleans the air to be breathable and odor free for the driver of the vehicle. We recommend an air filter to be changed out every 15,000 miles to keep the air in the vehicle healthy to breathe. You may be thinking; does my vehicle even have a cabin air filter? Not all vehicles are equipped with a cabin air filter. The cabin air filter gets rid of contaminants that are pumped into the cabin with the fans running. We recommend the cabin air filter to be changed out once a year and have a visual inspection completed every 5,000 miles.