The factory warranty ends exactly 3 years from the in-service-date
(date of original purchase)
Example: If the 2009 Nissan was originally purchased on 01/02/2009 the
warranty ends 01/02/2012
** NOTE: If the 09 was purchased say 09/09/2008 the warranty would end
09/09/2011
The next time you get service work or an oil change ask the Service
Manager what is the "In-Service-Date".
You could also try 1-800-NISSAN-1.