Answer: The Love Bug
Jim Douglas, a past his prime racecar driver, becomes the owner of a Volkswagen Beetle (Herbie) which can drive itself. Once Jim lets Herbie do his thing on the racetrack, he is on his way to winning the championship, despite the efforts of his less than sporting rivals.
To make Herbie appear to be self-driving the producers installed a system of cogs and pulleys for a driver sitting in the rear seat (out of camera view) to steer and control the car with. Dean Jones, who plays the part of the race driver in the movie, owns the only surviving, fully tricked out Herbie capable of squirting oil and opening its own doors. The racing number "53" was chosen by one of the producers who was a fan of baseball player Don Drysdale.