NHTSA Complaint #11452701 — 2021 TESLA MODEL Y

My 2021 Tesla Model Y has two problems related to braking: (1) frequent unexpected and unnecessary slowdowns while driving on Autopilot adaptive cruise control. The vehicle seems to believe something is in the road but it is not the case. This has been called "phantom braking" by many online reports. I experience this on nearly every drive where adaptive cruise control is engaged. (2) On one occasion the car locked up its brakes and began swerving to the left for no reason whatsoever. An alarm appeared on the screen and audible tones and a video was automatically saved. The event lasted only a second but would surely have caused a collision if another car was following me. The event occurred as I passed an oncoming truck on a two lane highway at night in good visibility. I was driving manually. Adaptive cruise control and auto steering were *not* engaged at the time. The extreme braking event was caused by the Adaptive Emergency Braking (AEB) system.