CarComplaints.com Notes: The 2004 Nissan Xterra doesn't seem to have any problem trends. The only thing prospective owners should be aware of are the less-than-perfect (but acceptable) crash test ratings.
There are a very few transmission complaints, but nothing like the huge defect that shows up starting in with the 2005 model year.
Ratings only apply to the model and body or seat type tested. The date of manufacture and optional safety equipment can affect results. For full details see www.iihs.org.