The CVT is the big one. Nissan's Jatco CVTs have a reputation, and while the unit in the L34 is an updated design, it's still worth keeping the transmission fluid fresh. Some owners report a slight drone or hesitation under hard acceleration, which is more CVT behavior than a defect. Beyond that, the QR25 can consume oil if you skip changes, and the infotainment system occasionally has software glitches that a dealer update usually fixes.