NHTSA complaint #11510781

Owner complaint summary

This issue has occurred at least twice. The two major incidents were about a year apart and happened pretty much on the same stretch of interstate. The first time, I was traveling at around 70 mph on the interstate on a bright sunny day in late winter. I feel like the roads may have been fairly white and bright from salt, which could possibly have affected how well sensors were working. Without any warning that I observed, the car braked suddenly. Had I not been wearing a seat belt, it's possible that I could have lost control of the vehicle. Or if someone had been following me closely, I could have been hit from behind. I believe this happened right before I was about to go under and overpass. The second incident was just last night, probably within five miles of the previous incident. It seems like it's usually just before I go under an underpass, which makes me wonder if that triggered it somehow. This time when it happened, I looked at the dash and saw some kind of message flash and disappear before I could read it. It seems like it was white in a yellow bar or yellow on a white bar. Again, it happened really quickly. Now that I'm typing this I feel like it might have happened once before prior to the other two events. I think it was at night and may have been raining. It wasn't quite as noticeable. I feel like I had the cruise on and the cruise suddenly stopped working because the sensors couldn't do their thing. I feel like it was more of a sudden deceleration more than a hard brake, but I am not certain of that. I know I had the intelligent cruising and lane assist on last night. I think I probably did both of the other times as well. I remember thinking during the rain incident that that was a very poor design for the system to brake/decelerate when the sensors stopped working. The additional details following are from the newest incident since it's fresh on my mind.