See also:

Alarm and warning when the engine starts
When the Intelligent Key system warning light (  ) blinks red and the outside buzzer sounds, make sure the Intelligent Key is inside the vehicle. ...

Safety
The Sentra received a Good overall rating — the highest possible score — in the Insurance Institute for Highway Safety's frontal-offset and side-impact crash tests. It received the next-best s ...

NISSAN Intelligent Key™ door buzzer
The Intelligent Key door buzzer sounds if the Intelligent Key is left inside the vehicle when locking the doors. When the buzzer sounds, be sure to check both the vehicle and the Intelligent Key. ...