"Joanie Gets Wheels" is the fifth episode of the eighth season of Happy Days.
Tired of being a pedestrian on dates, Joanie disobeys Howard and buys a car of her own, only to find out that hiding a car is too difficult to handle.
Side note: When Howard and Marion go to see the film "The Music Man", Marion claims the little red-haired boy in the movie poster reminds her of Richie. This was an inside joke, since as an 8-year-old, Ron Howard starred in the movie, and is actually the boy on the poster.