Continuity mistake: In the bullfighting scene Herbie's driver-side running board is dented upward in the middle, but in the following scene it isn't there.
Continuity mistake: When Herbie is thrown overboard, his rear licence plate is missing, but when Paco rescues Herbie from the ocean, you can see the rear licence plate again.
Continuity mistake: When Pete and Melissa are slow dancing during the costume party on the cruise liner, there is a black patch on Pete's racing outfit that keeps disappearing and re-appearing between shots.
Continuity mistake: After the bullfight, Aunt Louise knocks the shoulder ornament off Captain Blythe's uniform as they exit the car, but in a shot of Captain Blythe sitting in the back a few shots later, the ornament is back in place.
Continuity mistake: When Herbie launches the bananas on the propeller of the villains' plane, the blades cut up the bananas, covering the villains. At this point, Quinn (the villain in the black suit) has his glasses in his mouth and he takes the glasses with his left hand whilst wiping the banana mess off his face. In the next shot, his glasses are now in his right hand.