DPB 
2000 Nissan Xterra SUV SE 4dr SUV
Engine Issues
 I am glad that Nissan no longer uses this V6 engine when they introduced the 2005 model.  My engine problems began at 65 to 70k miles.  I had to replace the Knock sensor that is located deep inside the block.  The dealer wanted $1200 to replace; I used a non-dealer where the cost to repair in the book understates the labor hours. The timing belt won't last for 105K miles; they now recommend every 60k that costs another several hundred dollars.  Thank god my exhaust manifolds have held up even though my dealer said they needed to be replaced for $1200 (other mechanics said they were ok.) Nissan uses a "plastic" bolt on the ac compressor sprocket.  Mine eventually "popped" off. 