Diesel 
2004 Nissan Xterra SUV XE I4 Rwd 4dr SUV (2.4L 4cyl 5M)
Dependable
 Bought used with aprox. 20,000 miles, in 2006. Now has 80,000 in 2010. I have only changed the oil, the air filter, the head lights, wipers, and battery. Did every thing but the oil myself with ease. My good friend, a mechanic, recommended I buy an Xterra. I am glad I did. I owned a 2000 Frontier that never gave me a problem either, so I was happy to by another Nissan.  I'd bet it has the same 2.4 litter engine, but geared lower. I removed the roof rack air dam for better mileage.