See also:

Never leave these keys in the vehicle.
As many as 4 Intelligent Keys can be registered and used with one vehicle. The new keys must be registered by a NISSAN dealer prior to use with the Intelligent Key and NISSAN Vehicle Immobilizer ...

Opening the trunk lid
Opening the trunk lid 1. Push the trunk opener request switch A for more than 1 second while carrying the Intelligent Key with you. 2. The trunk will unlatch. A chime will sound 4 times. 3. ...

NISSAN vehicle immobilizer system
The NISSAN Vehicle Immobilizer System will not allow the engine to start without the use of a registered key. If the engine fails to start using a registered key (for example, when interference ...