Episode 30 of "Futurama"
s03e01 The Honking

Bender finds out his uncle had "died" and he has been left his uncle's old castle in his will - as long as stays there for one night. Bender and the Planet Express crew stay there, but Bender sees some robot "ghosts" and runs away screaming. He is knocked down by something and awakens next morning..... It turns out that Bender has been knocked down by a Were-Car, a virus that causes robots to be transformed into cars and go around running people over. Because Bender has been hit he is now a Were-Car, and Fry finds to his horror that the Were-Car will always try to run over his best friend. Fry and Leela secure Bender in his apartment to stop him from killing anybody, but when midnight comes, Bender turns into the Were-Car and escapes. He finds Fry and Leela and tries to run over.....Leela. Fry is upset by this because he thought he was Bender's best friend. Leela tries to find out how to get rid of the curse - and the only way to do this is to get rid of the original Were-Car. So off they go to find it.....