See also:

NISSAN Intelligent Key™ battery discharge
If the battery of the Intelligent Key is almost discharged, the guide light A of the Intelligent Key port blinks and the indicator appears on the vehicle information display. See “Vehicle infor ...

Never leave these keys in the vehicle.
Additional or replacement keys. If you still have a key, the key number is not necessary when you need extra NISSAN Vehicle Immobilizer System keys. Your dealer can duplicate your existing key. ...

Vehicle identification number (chassis number)
The vehicle identification number is located as shown. ...