 This is the second Sentra I have owned and it is clear that the quality of Nissan's cars are not what they once were.  Blown Head gasket at 70,000 miles.  Tried to work through Customer Service, but they offered no assistance (less than 36 months, but over on miles).  This is a design flaw relating to the number 2 cylinder, but Nissan is turning the other way hoping this issue will disappear.