I drove an ID-4 down south and preparing for right turn. Suddenly, the car was accelerating to a very high speed with the accelerator not being pressed (spontaneous acceleration). I tried hard to press the brake, but no effectiveness. Instead of turning a 90-degree angle to the west direction, the car only turned 45 degrees toward southwest, hitting the safety island and jump over the island, then crossing the eastbound road, climbing up the curb and the left side of the car hit the street tree. The car then snaked along the sidewalk and grass toward west before it stopped. The car then is pulled to the body shop (Caliber in San Jose). 1) Accelerator and brake are both failed. The car spontaneously accelerates itself and cannot be stopped even pressing the brake paddle 2) In the collision, my left shoulder and neck got hurts. 3) Not yet. The car is in the body shop. 4) The car is in the body shop. Police has seen the car. 5) No. It happened suddenly.