Doesn't really matter. As I mentioned earlier get rid of any new car after the warranty is up. Ford has now lowered parts availability from 10 to 7 yrs. it's one way they avoided needing the bail out.

Most domestic cars it's hard to get parts for if it's over 10 yrs old if it's not a classic. However that's mostly trim/cosmetic pieces. Engine/mechanical parts are usually still available if not the aftermarket has them.

If u like the durrango I wouldn't let that stop u. Many cars only have a few yr run before the new body style is out.