Revealing mistake: Right after McQueen asks what the Ghostlight is, it cuts back to the other cars. Luigi is right next to the firetruck and some gas pumps. The firetruck's door is very reflective, and the gas pumps are visible in it. But Luigi is right by the pump, and he is not reflected in the firetruck's door. (00:02:10)
Character mistake: When Cruise goes to see if the Champ is OK, he says his boss bet all the money on the race. It was not his boss who bet the money, it was Lugnut who bet the money. (00:25:10)
Continuity mistake: Hargon has a hook for a left hand. After the opening credits (during the dice roll scene) the hook is briefly on his right arm. Then it's left again during the rest of the episode.