If the CPO Mazda you buy is out of its original factory warranty period, you get the Mazda CPO 1-year/12,000-mile limited warranty and the 7-year/100,000-mile powertrain warranty. To see how much longer the powertrain coverage really is on a CPO Mazda you are buying, subtract its age and miles from those figures, which are measured from the vehicle’s original in-service date.