The contact owns a 2020 Tesla Model Y. The contact stated that after an update was made to the vehicle's autopilot feature, the vehicle experienced phantom braking intermittently that activated without the brake pedal being depressed. The contact stated that while his wife was driving on autopilot at 55 MPH, the phantom brake occurred which caused the vehicle to hydroplane. The vehicle initially veered to the left and then to the right, hitting a guardrail. The air bags did not deploy upon impact. The guardrail was damaged as a result of the incident. The contact's wife did not notice any warning lights during the failure. His wife did not suffer any injuries during the crash and a police report was not filed. The contact's wife managed to drive the vehicle home after the incident. The service center nor the manufacturer had yet to be notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 30,000.