I see, I guess depends on how far you want to take it with the dealership but I guess, just fix it up slowly, getting it back to how you want it.
Unless you got the time and money for a full rebuild, then you will know for sure it's all good.
http://www.nissanfast.info/carinfo.html
"Put your VIN code in the "VIN code" box in FAST" - As simple as that sounds