This is a list of covered Part Numbers. Anything not listed is likely not covered. I've learned that Bolts, Attachment Components, and most of the Exhaust System are NOT covered.
You can look up your Part Numbers on Courtesy's site then look below to see if it's covered.
http://www.courtesyparts.com/armada-ta60-2004-2007/genuine-nissan-parts/-c-1063_1064.html
http://www.nissanextendedwarranty.com/docs/NissanWarrantyComponentCoverageChart.pdf
You can look up your Part Numbers on Courtesy's site then look below to see if it's covered.
http://www.courtesyparts.com/armada-ta60-2004-2007/genuine-nissan-parts/-c-1063_1064.html
http://www.nissanextendedwarranty.com/docs/NissanWarrantyComponentCoverageChart.pdf