While driving on an interstate freeway on 8-14-2021, using the vehicle Autopilot driver assistance mode (which I had been using for the previous 18 months without incident), the vehicle failed to avoid hitting the vehicle in front of me. This collision resulted in no passenger injury, but resulted in both driver and passenger airbags to engage and resulted in total vehicle loss of the Tesla Model X. No other vehicles involved had airbag engagement. Tesla may have actual information on the functioning of the vehicle and the Autopilot software that may explain why the collision avoidance system failed, but refused to supply me with this information.