Under federal law OBD cars,trucks,and vans are covered for 8 years 80,000 miles which ever comes first. So if you get a check engine light and its an emissions problem go straight to the dealer they have to fix it for free.. regardless of your 3 yrs 36,000 mile warranty like on most cars. Spread the word on any Make of car.Ford,Chevy,Dodge, BMW,Toyota,etc......