After Harry and Ron couldn’t get onto platform 9 and 3/4, they took Mr. Weasleys’ car, the Ford Anglia and flew it from the train station in London to Hogwarts. When they arrived, they were attacked by the Whomping Willow after landing right in it. Once they had escaped and got far enough away, the Ford Anglia threw out Harry and Ron as well as their things before driving off into the Forbidden Forest only to be seen one other time. After it had gone wild.
Ford Anglia Goes Wild