Back Up Alarm problems of the 2013 Infiniti JX35

The warning light for back up collision intervention system and the blind spot warning (bsw) comes on suddenly while driving. It comes on at different speeds and happens on the highway driving as well as city driving. The infinti dealer in tampa FL cannot fix the problem and hence comes up with reasons and false diagnosis. They also blame that the vehicle has had some body work done in the bumper which is not the case as the vehicle has never been for any body work since purchased from the same dealer.