Sirgwhiz 
2005 Nissan Xterra SUV Off-Road 4WD 4dr SUV (4.0L 6cyl 5A)
Disappointing
 Bought vehicle new; mpg ratings were 16-20. Had an 03 Maxima rated at 24-28 mpg; in 45k miles avged 31.5. Expected Xterra to avg 20 or better. Highest ever was 17. Service rep said it was within specs and offered no help.  Dealer couldn't reprogram. Overall it is rugged, manages very well in snow and slush and truly is a stable multiple purpose vehicle.  Circuit card for fan and AC burned out, $60; clunking in drive train after 35k miles, dealer replaced front and rear drive shafts did not fix the noise.  Spare tire lift mechanism broke ($140 - replaced it myself); jack is cheap and bent in use; leak in tailgate corroded lock; wheel bearing went out at 65000, tow & repair $900