NHTSA Complaint #11453322 — 2022 TESLA MODEL Y

While using adaptive cruise control at highway speeds, the car suddenly engaged the brakes. This occurred both on a multilane highway (with no direct oncoming traffic) as well as on a smaller single lane highway with oncoming traffic in the adjacent lane. When it happened on a multilane highway, there were no cars ahead of me at the time. I was passing a large exit sign located on the side of the road. When it happened on the single lane highway, there was a semi truck headed towards me in the adjacent lane. On the multilane highway, it was fortunate that there was nobody behind me as the brake application was forceful and could have resulted in me being rear-ended. On the single lane highway, it was a terrifying experience because the brakes engaged rapidly as a truck was approaching at highway speeds. The problem has not been confirmed by a dealer, I have an appointment for service pending. It has not been inspected by any party. The collision warning alarms did not go off when during either event, and no other alarms were activated. I turned off the cruise control after the second episode and have not used it since.