Is it still under warranty? (or) have there been any recalls on it?
I dont know about the X, but there's a site for Dodge trucks that has a list of TSB's and recalls. Call the dealer to see if what you mentioned was a recall thingy, and let them worry about it...
If the whole cluster's going out, it might be a wiring harness connection...???
Have you tried searching the net for Xterra sites? I know they're out there. I dont know how many X's I've seen with WWW.Xsomething???.com on the back windows, in town.
Try this site.. click here
I found it doin a search.... do a search on there. I used the words "gauge cluster" under the general catagory, and it came up with "Instument Cluster Failure"..i tried to click it, but i think u have to be a registered member....thats too much work for me.....good luck