Nissan Repair Questions? Ask a Mechanic for Answers ASAP
Hey there, thats the turbine revolution sensor which detects input shaft speed and can definately cause your problem.
The sensor is not easy to change, it's very difficult as it's INSIDE the transmission on this year xterra. The part is also hard to find by itself because it attaached to the main control valve and is usually replaced as an assembly. That unfortunately is like $900 !!