See also:

Nissan Intelligent Key™ door buzzer (if so equipped)
The Intelligent Key door buzzer sounds if any one of the following improper operations is found. ● The ignition switch is not returned to the LOCK position when locking the doors. ● ...

Doors
- Always have the doors locked while driving. Along with the use of seat belts, this provides greater safety in the event of an accident by helping to prevent persons from being thrown ...

Brakes
If the brakes do not operate properly, have the brakes checked by a NISSAN dealer. ...