2021 TOYOTA redundant SIENNA Steering Problems

In the 2-1/2 years than I have owned and driven this vehicle, I've had no problems. On Saturday, [XXX], driving home from a 80 mile trip, as I deaccelerated to make a left turn onto my street (speed was 7mph) I tapped the break pedal and the vehicle went bonkers! The Sienna veered right at a high rate of speed that the front end cleared the curb; the back end smashed into the curb flattening both rear tires and damaging the metal hubcaps; the vehicle speed tore off the bumper and both rear panels. I was able to steer the vehicle: missing a large 2-foot high tree stump; two other large trees; a 10-foot high solid fence at the yard back. I then drove down the sidewalk to the next intersection and was finally able to slow down. This entire time, my foot was on the break, but the vehicle...

The contact owns a 2021 Toyota Sienna. The contact stated while driving at approximately 50 MPH, the rear end of the vehicle started to sway to the left and the right. The contact attempted to steer the vehicle however, the steering wheel was very difficult to turn. Additionally, the contact depressed the brake pedal, and the pedal was very loose and depressed to the floorboard. The contact pulled over and had the vehicle towed to a dealer. The contact stated that the dealer was not able to duplicate the failure. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 73,000.

En ocasiones el vehículo no frena adecuadamente, tiene ruido en la parte delantera y se aselera bruscamente cuando está en descenso por aproximadamente 5 minutos