It doesn't take much to have a problem though... in June we busted an axle and blew out our front diff driving through some ruts at Hungry Valley... our X was only 4 months old and had less than 10k on it... Nissan's first question was did we hit a rock(abuse)but after seeing our full set of Shrock skids they covered it and the X was up and running in 4 days... oddly enough, 2 weeks ago we popped a front swaybar link about 10 feet from the spot where we blew the diff (The Nissan Black Hole of Hungry Valley) and after asking the rock question again Nissan fixed that too...

a word of warning, unless your long term warranty covers any damage it will probably still be subject to the "abuse" defence that a lot of dealers immediately raise...