^Parking brake requires periodic adjustment and adjustments IIRC are only covered for 12 months/12,000 miles. If an adjustment is needed it's up to you to adjust it or take it in - Nissan will not cover anything related to a parking brake failure unless you have a good case, and most likely a good lawyer. (Former consumer affairs employee for another auto maker here).
For my
I just use the parking brake on level ground. On an incline I also put it in gear and turn my wheels to the curb as taught in drivers ed those many years ago.