 Purchased used 05 Pathfinder in January of this year.  Within a month of owning the vehicle, began having the transmission problems that everyone talks about on here (radiator fluid mixing w/ transm. fluid) completely destroying the transmission and radiator.  Also began having the fuel sensor problem that everyone talks about.  This all occurred between 65K - 70K miles.  Don't take just my word for it.  Read all of the bad reviews online for this vehicle for the tranny and fuel sensor problem.  New tranny costs $5,000.  To top things off, the gas mileage is awful on this vehicle (16 mpg best I ever got) I highly suggest you stay away from this vehicle.  