NHTSA Complaint #11564006 — 2021 TESLA MODEL Y

While driving on highways using adaptive cruise control, the vehicle will slow down quickly from highway speeds of 60 to 75 mph, down to 40 or 45 mph without the presence of an obstruction in front, such as a vehicle, or even a shadow, that could fool the vehicle’s camera. This puts us at risk of being rear-ended on the highway. The problem happens randomly. I have reported the issue to Tesla twice. It happened once while on the phone with a Tesla representative that had called me back regarding my reported complaint. The Tesla rep said they were aware of the issue and were working on correcting the issue via a software issue. Tesla has cancelled my requests for service appointments regarding this issue. In September of 2023 we attempted to use the cruise control to see if it had been repaired but it happened again. There were no prior warnings. The issue first appeared in September of 2021. It has happened many times since then. I first reported around Sep of 2022.