Nissan vehicles come with a 3 yr/36000 mile base warranty and a 5 yr/60000 mile powertrain warranty. Suspension componants are covered under the 3 yr/36000 mile warranty. The only way they would be covered beyond that point is if you purchased an extended warranty that covers said parts beyond those limits, or, if a campaign or recall is created that would cover those parts.
Some genuine Nissan replacement parts that are installed by a Nissan dealer, including struts and mufflers, carry a limited lifetime warranty. Nissan "premium" brake pads also used to be covered under the lifetime warranty, but I'm not sure if they still are. Nissan also carries "Key Value" exhausts and brake pads that are made by OEM suppliers but at a cost that is competitively priced to the aftermarket alternatives; these "Key Value" parts carry a 12 month/12000 mile warranty, which is the same coverage as the majority of parts purchased from Nissan.
Another form of warranty is "Good Will" warranty. This is at the discretion of the dealer and usually reserved for cases where a part fails just after the warranty has expired and/or for exceptional customers (those that have purchased at lot of vehicles at a particular dealer or who has done all of their service work at a dealer, for example). In some cases they may cover the whole expense of the repair, or adjust the cost of the repair. For example, they may cover 50% of the repair bill if you have it done at a Nissan dealer or pay for the parts if you assume the cost of the dealer's labor to install them.