I bought this car used at 40k miles, history was good. I have driven it for 50k miles (so at 90k now). Since I have purchased it, there have been 3 major failures, and also a recall that turned out to be nothing. The first major failure was the exhaust manifold cracking and needing to be replaced. An exhaust manifold should never crack that early, and the exhaust shop told me he has seen a lot of Altimas with this problem. Second major problem was the Electronic Steering Column Lock. This failure caused me to be stranded, as the car would not start.
As of two days ago the final major failure occurred. Dealer is saying it is a rod bearing! STAY AWAY - much better options out there.