It's funny that you guys are talking about this suppension problem. I have been having this problem for some time now. I have taken in to the dealer and they acknowlege the problem but won't do anything about it. I am still under the bumper to bumper warrranty. I then took the problem directly to Nissan and they are putting it in the hands of one thier local rep. Nissan asked me, what do you want us to do? I said replace the rear leaf springs. I am starting to wonder if that will solve the problem. Does anyone have any suggestions?