The contact owns a 2022 Tesla Model Y. The contact stated while driving 45-50 MPH, a vehicle at a 28 ft. distance from him slammed on the brakes. The contact then depressed the brake pedal but the vehicle failed to respond and crashed into the rear of the other occupied vehicle. The forward collision sensor warning light then illuminated. The air bags did not deploy. There were no injuries sustained. There was no police report filed. The contact was able to continue driving. The manufacturer was not notified of the failure. The vehicle was not diagnosed nor repaired. The failure mileage was approximately 32,000.