dmbstl 
2006 Nissan Xterra SUV X 4dr SUV (4.0L 6cyl 5A)
DO NOT buy the Xterra: known major issues with transmission.
 I was generally satisfied with my Xterra up untilabout a year ago. The problems started rolling in with major cash outlays for numerous issues. Fuel level sensor and fuel pump issues along with numerous electrical problems. Then the worst recently hit where the transmission fluid leaked into the coolant system. The dealership estimated a repair cost of almost $10,000 for the cooling system and transmission replacement.Apparently this is a known issue as Nissan has recently extended the warranty somewhat, but not enough to cover most drivers. If you search online, Xterra transmission system issues is a top result.(I worked hard to use other sources and get the cost to $5000.)