I replaced the cvt in my Maxima at under 70k miles and sold it because the new transmission started acting weird exactly 12 months later (right after the warranty expired).
Ooooo. That sucks. My biggest issue other than wear and tear is the mass airflow sensor. I have to change it out every year. But other than that, I been pretty lucky.
t. Had that happen to a 2013 Nissan Sentra I owned at 89k miles