I am pretty sure this should be covered under the 12 month/ 12,000 mile adjustment warranty from Nissan. Its basically a warranty which covers everything, including some wear items like bulbs, I think.
To get to the rear lights, remove the plastic cover next to the light assembly and then remove the light mounting bolts. The whole assembly comes out, and then you can replace the bulb. The specs for the light assembly mounting bolts is 40-56 in-lb. The FSM is explicit to say "be careful" about those specs. Don't screw it in so tight as to snap the plastic.