Manifold/header/muffler/tail Pipe problems of the 2010 Nissan Versa

I had my mechanic check my car after I heard noise/vibration coming from the car when stopped at a light. It turns out the muffler is rusting from the manifold back: including catalytic converter, center and rear muffler, hardware and gaskets and the heat shield needs secured. The car is just over 50,000 miles, not a lot and Nissan should be replacing this free of charge but I will probably have to pay for it. This is a danger and they should build their parts better to handle road salt in the winter months.

Loud noise when driving. Took to local mechanic next day and was told the flange broke from the muffler.

While driving home from work my 2010 Nissan Versa began to make a rumbling sound. It has sense grown to a roar while stopped with the car in drive. I took it to the dealer where I got it and they said the rear muffler assembly had broken loose and was rubbing on the frame causing the noise and vibrations in the driver compartment. Upon a brief internet search I have found that many other Nissan owners have experienced the same problem. Nissan claims it is due to road salt, but the only part that is rusting out is the flange leading to the rear muffler assembly.

I purchased this car used from a dealership 11/3/2011, no problems whatsoever, had remainder of regular vehicle warranty left on it, no problems until the other day I thought it sounded louder than normal, so when I drove it yesterday it was still louder and I looked underneath and the muffler is loose and the exhaust sounds terrible. This is terrible for a not even three year old car with less than 30,000 miles on it!!! I called the garage where I bought it and they say it should be covered under warranty but I have to take it over for them to look at first to be sure so it better be or I will be quite upset if I have to fork out money on a car that is less than three years old on something with the exhaust! my previous car was a Dodge and I had it for 7 years and never had any problems with muffler or exhaust needing replaced in 7 years!!.