NHTSA Complaint #11591676 — 2016 TESLA MODEL X

On May 30, on a 55 mph highway, my Tesla Model X was traveling at highway speed in thick traffic. The vehicle was using cruise control, but not auto pilot. In other words, the auto steering function was not engaged. A vehicle that the Tesla Model X was following came to a sudden, unexpected stop. I applied the brake pedal with full force. The anti-lock brakes engaged and the brakes began pulsing (normal anti-lock brake behavior). However, while the brake pedal was depressed with full force, the anti-lock brakes stopped pulsing and the brake pads disengaged from the rotors. The car coasted as if the brake pedal was not depressed. The brake failure resulted in a frontal collision with the stopped vehicle. A police report was filed at the scene of the crash. There were no physical injuries and the Tesla Model X was driveable after the incident. However, the car that was struck had significant damage (but no bodily injuries). Because the Model X was driveable, I attempted to recreate the incident 12 hours later. However, as I tested the brakes, they behaved normally. With the fully depressed brake pedal, the antilock brakes stayed active until a full stop of the vehicle. Is it possible that the frontal collision system malfunctioned? As the frontal sensors detected an impending crash, did the car's computer disengage the brakes mistakenly? The car had no warning lights prior to May 30. However, at the exact time of the crash, two codes were registered. (I used the Tesla service mode to access them). One code states the anti-lock brakes were active. The second code registered exactly 2 seconds later and states "Pedestrian safety system fault". There is a police report, but we have not received it yet. I had to check NO in the form because the form would not allow me to move forward unless I uploaded the report. I can upload the police report when I receive it.