Transmission Noise Problems of BMW X5

While I was driving the car alone around 7:30pm 5/13/2021 on the way to a restaurant, after I pushed the gas pedal to pass another car (accelerated to about 50mile-55mile/hr), the car all of a sudden accelerated on itself. I noticed right away after my right foot moved away from the gas pedal (from 50 to 55 then up to 65mile/hr, I stopped my observation since it was getting too fast). I have to constantly hit the brake pedal to reduce the speed for about a mile or two. After I reached the next traffic light, I had to push the brake pedal very hard to make the car fully stop, so I decided to switch the transmission from d to p to see if it could get out of acceleration problem. Once I switched to park, I tried to switch it back to drive mode, however the car did not respond and stayed in parking mode. I then tried to turn off the engine and turned it back two to three times, it just didn't allow me to change back to drive mode. I also noticed that the car made a lot of noise since it accelerated on its own. I realized it was too dangerous to sit in the car in front of the traffic light even with the emergency light on. So I decided to turn it off and left the car. I smelled a very strong burning smell even though I quickly moved away from the car. I waited on the street side for about 2-3 minutes and went back to the car, I was finally able to switch to d mode and drove away slowly. I had similar problem happened last year around October for 3-4 times (not as bad as it was today, I can turn engine off and turn it back on, it will return to normal) and I brought the car back to BMW dealership (BMW at gwinnett place in duluth GA, where I bought the car in Nov 2019) and they won't be able to create the problem. The technician just told me to drive slowly (25-35mile/hr for the first 3-4 min) everyday at the beginning. I recorded two videos at the traffic light.

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Tl the contact owns a 2011 BMW X5. While driving 40 mph, the contact heard an abnormal rumbling and banging noise. The emergency power down pull over message was displayed. There was oil emerging from the vehicle. The vehicle was towed to BMW of wyoming valley (1470 highway 315, wilkes-barre, PA 18702, (570) 338-6955) where it was diagnosed that there was a transmission explosion. The vehicle was not repaired. The manufacturer was not contacted. The contact stated that the failure was similar to NHTSA campaign number: 17v138000 (power train). The failure mileage was approximately 120,000. The VIN was invalid.

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