Before starting
To get the best recognition performance from Voice Recognition, observe the following:
● The interior of the vehicle should be as quiet as possible. Close the windows to eliminate the surrounding noises (traffic noise and vibration sounds, etc.), which may prevent the system from correctly recognizing the voice commands.
● Wait until the tone sounds before speaking a command.
● Speak in a natural conversational voice without pausing between words.
● If the air conditioner is set to “Auto”, the fan speed is automatically lowered so that your commands can be recognized more easily.

See also:
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. ...
Head restraints
Head restraints supplement the other vehicle
safety systems. They may provide
additional protection against injury in certain
rear end collisions. Adjust the head
restraints properly, as spe ...
Temperature
High temperatures accelerate the rate of corrosion
to those parts which are not well ventilated. ...
