NHTSA Complaint #11528024 — 2023 TESLA MODEL 3

I was driving from Palmdale, CA up to Mojave, CA at 7:05PM on June 16. The car was close to Rosamond, CA on the highway when it engaged FULL brakes. I started in the right lane, the autopilot was ON and set to 79MPH. The only cars visible on the highway were my car and the car in front of me. There were no other cars immediately visible to me or autopilot in front of me or behind me - other than us two. My car was traveling faster than the car in front of me, so at ~3-5 car lengths I started a left turn signal to merge into the left lane, and overtake the small car (silver Toyota?) in front of me in the left lane. When I started the left turn signal the autopilot disengaged as expected. I got in the left lane then stopped the signal, and turned ON autopilot @ 79MPH. My car started overtaking the car in the right lane, the car beside me was now in my right blind spot. Then all of a sudden my car engaged FULL brakes and went from 79 MPH to maybe 30MPH? As a reminder there were no cars in front of me or behind me. The other car was to my right. I quickly assessed the situation to confirm I wasn't going to be rear ended by the car to my right and pushed the gas peddle as hard as I could to accelerate back to 70+ MPH. I checked to see the sun was behind me so the car's cameras were definitely not blinded, I sped far enough away from the car next to me to take a photo of the area I was driving in. Please see the photo attached to see the condition of the sky and to confirm the roads were completely empty when the tesla decided to brake in its full capacity for what I believe to be no reason at all. I fully believe if there was someone behind me in the left lane even at a safe distance I would have been inadvertently rear ended as there was no reason or cause for the car to be breaking that hard. I'm sure Tesla can provide telemetry data from my car to corroborate my version of the events.