See also:

Keys
A key number plate is supplied with your keys. Record the key number and keep it in a safe place (such as your wallet), not in the vehicle. If you lose your keys, see a NISSAN dealer for duplicates ...

Troubleshooting guide
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Exhaust gas (carbon monoxide)
WARNING • Do not breathe exhaust gases; they contain colorless and odorless carbon monoxide. Carbon monoxide is dangerous. It can cause unconsciousness or death. • If you suspect that exhaus ...