 I purchase a "certified used" 2013 Altima ten months ago, without a warranty.  Being a little old school teacher, I've only driven it 6,000 miles in that time.  It has been in the shop five separate times for repairs: Alternator replacement, serpentine belt replacement, radiator replaced, A/C condensor just went out, and two vehicle recalls.  Being the former owner of a 2008 Altima, which did not have a single problem, I placed my faith in the reliability of the product without checking Consumer Reports for the 2013 version.  Check the report; the 2013-newer Altima's consumer rating are inferior to older versions.  I absolutely love the style and comfort of this car, but it looks like Nissan has lost me as a customer with its poor dependability and expensive repairs.Update 10 months later:  Car was totaled after being hit by a drunk driver.  Though disappointed with the mechanical liability of the car, I can attest that the safety features on the car saved our lives when impacted at a high speed with a DUI driver head-on.  Though I am not sorry about the loss of the car, nor the constant repairs, I was impressed with it protecting me and my passenger at the time of collision.