 I purchased a 2015 Altima S from the dealer. Initially upon taking it home we heard a knocking in the engine.  Five weeks after we had it, we took a road trip.  It was one of the most horrifying experiences of  my life.  The car wandered and shifted from left to right at higher speeds.  Keeping it on the road was a major ordeal and very exhausting.  We were happy to make it to our destination and back.  Once we got home the car was taken to the deal where it was purchased.  The service manager explained that the new electronic steering in the new models was set that way and I would just have to "learn to deal with it." They checked out the car and claimed that nothing was wrong.  At this point I would not drive the card off of the lot as I know it is unsafe and very dangerous.  I was forced to buy a Rogue and loose thousands of dollars on the deal after owning the car for only 5 weeks and driving it for less than 1,000 miles.  My attempts to explain the situation to Nissan Consumer Affairs were useless.  Buyer beware!