boot door?

You could always do what it took me less than a minute to do and try a Google search. You'd find that it is anot uncommon problem. See these that I found:

http://www.noteownersclub.co.uk/forum/back-boot-wont-open_topic816.html

http://www.justanswer.com/uk-nissan/2j9mx-nissan-note-hatch-rear-door-will-not-unlock-therefore-will-not-open.html#re.v/416/

Plenty more out there. Just search.

XXX
December 2015