Larry B. 
2006 Nissan Frontier Crew Cab LE 4dr Crew Cab 4WD SB (4.0L 6cyl 5A)
Rock solid truck
 I bought this truck new and currently has 177,000 miles on it.  It has been trouble free for the most part, except for two common problems - fuel level sending switch went out at 107,000 miles ($350 to replace at local shop) , and radiator developed internal leak at 130,000 miles ($800 to replace at local shop).  Luckily, I detected the radiator leak early-on, before it ruined the transmission.  I had the transmission fluid and filter replaced when new radiator installed and 47,000 miles later, no problems.  Other significant maintenance I've had done include replacing lower ball joints at about 150,000 miles, one u-joint on front drive shaft at 155,000 (4WD), and one front wheel bearing at 167,000 miles. That's about it for things that have worn out.  At 67,000 miles, I put new Michelin LTX tires on truck (still have 4/32's tread left) and at 130,000 miles, I went ahead and installed a new set of Bilstein 4600 shocks, even though original ones seemed to be ok.  The Michelins and  Bilsteins really improved how the truck handled and how it rode on the highway - amazing difference.   I'm very happy with my truck - it is rock solid in the way it rides and handles, it is a comfortable highway cruiser, it is very easy to get in and out of (I'm 6' tall and don't bump my head getting into it like I do on my friend's Tacoma), it's been reasonably reliable , and at 65 MPH, I get about 23 MPG.