NHTSA Complaint #11450146 — 2021 TESLA MODEL Y

I was driving north on I-5 in southern Washington on a sunny Sunday morning with low traffic in October 2020. I had only had the car for a few days and was using the autopilot and cruise control for the first time. As I approached an overpass that was casting a shadow across the highway, the car suddenly braked hard. Fortunately there were no vehicles immediately behind me. If there had been, I likely would have been rear-ended. About 15 minutes later, while driving in the middle of the three northbound lanes, a motorcycle passed me on the left and then cut across my lane to get to an exit. Again, the car braked suddenly. When I next stopped to charge the vehicle, I went online and read on various Tesla user chatrooms that this was a widely experienced problem. I immediately stopped using the autopilot and cruise control. I have not used them at all in the past 15 months.