Purolator C36154 BreatheEASY Cabin Air Filter Cabin air filters prevent dust and other contaminants from tainting the air you and your passengers breathe in your vehicle Cabin air filters prevent particles such as pollen, dust, mold spores, tobacco smoke, soot, smog, mildew, pet dander and fungus from getting from the outside into the air Many vehicles today comes factory installed with a cabin filter or at a minimum the cabin filter housing It is very simple to install a Purolator Breathe Easy cabin filter, some take less than 5 minutes Purolator recommends that you replace your dirty cabin filter with a new Purolator Breathe Easy cabin filter every 12000 to 18000 miles, or as specified by your vehicle's manufacturer