Stopped at light the car suddenly bolted forward hitting ( 4-5 ft between vehicles)car infront. My car then bolted forward and hit the vehicle again. The gear shift would not respond to putting it into park, The only way it was corrected was turn off the engine. Second time this happened was in my garage..the car bolted in reverse and would not stop. until engine turned off. I took the car to the dealer and he said my sensors were bent….(from hitting the car) and we waited 5 hours for Nissan tech to respond, which I left the dealership and told them to let me know what the tech reps said. But I was charged $247.00 for estimate and told the replacement of sensors would be $2,970.29.