NHTSA Complaint #11501787 — 2021 TESLA MODEL Y

Jan 13, 2023 at 7:02AM PST. While using adaptive cruise control with lanekeeping, I was driving in second lane from the right at a constant speed. There was plenty of room in front of me- no car nearby. As I was slowly passing the car to my right, another car that was behind the car to my right began a normal lane change to its left into my lane behind me. For no reason, my car began to slow down suddenly. Video footage of cameras on my car show the moment when the front of my car pitched down because it was suddenly slowing down. The rear camera view shows when my car's brake lights illuminated for no good reason. I immediately intervened and accelerated back to my highway speed so as to not contribute to the car behind me running into me or having to suddenly brake itself and leading to a problem for yet more drivers. These video files I am linking to show the incident 14 seconds into each video. https://www.icloud.com/sharedalbum/#B0kGqkRUiGD9Mw9 I've experienced many examples of this phantom breaking since upgrading to 2022.44.30. I wish my car had a feature to enable simple, old fashioned, cruise control so I could use it on highways.