Audio system (if so equipped)
Nissan Altima / Nissan Altima Owners Manual / Monitor, climate, audio, phone and voice recognition systems / Audio system (if so equipped)
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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. ...
Warning signals
To help prevent the vehicle from moving unexpectedly
by erroneous operation of the Intelligent
Key or to help prevent the vehicle from being
stolen, a chime or buzzer sounds from inside and
outsid ...