See also:

Regulatory Information
FCC Regulatory information – CAUTION: To maintain compliance with FCC’s RF exposure guidelines, use only the supplied antenna. Unauthorized antenna, modification, or attachments could damage ...

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. ...

Keyfob (if so equipped)
Keyfob (if so equipped) Replace the battery in the keyfob as follows. 1 Open the lid using a coin A . 2 Remove the battery B . 3 Install a new battery C with the “+” facing down. ● ...