On July 13, 2021 at round 1951 hours, in broad day light at that time of Summer, The Tesla Model X , 75 D, was engaged in autopilot mode travelling westward at posted speed limit of 50 mph on a local highway road. The vehicle failed to slow down by using "ADAPTIVE CRUISE CONTROL" but went ahead and hit the parked Dooley Truck at Red light, causing crumpling of the front of Tesla and some dent in the vehicle that got hit by it. It failed to give enough 'FORWARD COLLISION WARNING" to apply brakes. It did not deploy "EMERGENCY BREAKING SYSTEM", to avoid the Collision. When the Forward Collision sound was heard, it was too late, and when the brake was applied, it disabled the whole Vehicle and collided and stopped. The Air bag was deployed, but with minor injuries to the Drivers. The front of Tesla was crumpled as designed, and also as there is no Engine but only a Bonnet in front, it easily collapsed on itself. An Investigation was done by Tesla, and they called to say that, Quote: " The Auto pilot feature was on, the vehicle was driving at 50 mph, that is the posted limit on that highway. They could not confirm whether the hands of the driver was on the steering or not? That means they say the hands of the driver may be on the steering wheel, but cannot confirm it? The brakes were applied by the driver 45 sec before the crash, which disabled the main battery of the vehicle and resulted in crash". There were no warning lamps, messages of other symptoms prior to failure, excep