What's the cause of the Rear suspension of the fx35 to sways on uneven roads?

I have a Infiniti FX35 doing the same thing, did you ever find out what was wrong with yours. Please let me know.

Hi, there. I had the same problem. Even in curves to left. After a few different mechanical inspections, at the end it was concluded that a bushing in the called rear radius arm was wrong so I have to change it ( both sides). I asked for it to a Infiniti Dealer and they wanted to sell me the radius lower arm with its bushing (about 600€). So I am in the search of the bushing itself...I am thinking in the polyurethane ones.I am telling you in a few days. Bye