Revealing mistake: When Carole and Jim rush out of Herbie to find Thorndyke under the bonnet, you can see that Carole is not Michele Lee but her stunt double.
Plot hole: When Jim is shown what he has to pay for the damages Herbie did to Mr. Wu's shop he says he has no money. First off if he had no money how in the world was he able to put down any money on the red sports car he had just purchased that night? Secondly, what happened to the prize money from all the races he was winning from the previous few months?
Continuity mistake: At the beginning of the Mexico race, Herbie's passenger door is smashed in; yet for the remainder of the scene, his door is fine.
Continuity mistake: Jim pulls up to his home in a new red Lamborghini, parks it in front of Herbie and goes inside. Later he hears crashing noises and runs out to find Herbie smashing the new car, but the car is now a red E Type Jaguar and not the Lamborghini.
Continuity mistake: When the wheel comes off Herbie and the car crashes over the side of the cliff, the bonnet is up, but in the next shot it is down again.
Continuity mistake: When Tennessee takes Herbie back home after he broke down during the Riverside race, in the rear window Thorndyke has no-one beside him, but in the next shot he is now standing next to a blonde girl in a pink dress.
Continuity mistake: When Thorndyke sprays Havershaw with his oil pistol in the garage, Havershaw's neck is covered with oil, but viewed from behind, it is completely clean.
Revealing mistake: In a shot of Thorndyke's car and the front and back of Herbie as they approach the finish line of the El Dorado, look at the back half and you can see that Tennessee is not Buddy Hackett but his stunt double.
Continuity mistake: When Thorndyke and Havershaw are working in the garage towards the end of the movie, you can see Thorndyke brings down his oil pistol from the ramp when Havershaw reminds him about the wager he made with Mr Wu, but in the next shot Thorndyke is holding his oil pistol near the ramp again.
Continuity mistake: At the start of the El Dorado road race, you can see Herbie leaving the grid when the starter waves the green flag, but after a quick cut to Jim, Carole and Tennessee in Herbie, we see the other cars and Herbie is leaving the grid for a second time.
Suggested correction: If you look at where Herbie is in the starting field, you see that the only time we see him crossing the starting line, is after the cut scene inside the car. The scene before that, when he starts moving, we see him from his position in the field, not crossing the starting line.
Continuity mistake: When Thorndyke and Havershaw are working in the garage towards the end of the movie, Thorndyke says to Havershaw "You're despicable!" and squirts oil on him. At this point, you can see the top of Havershaw's overalls is covered in oil, but when Thorndyke squirts oil at him a few shots later, the oil has disappeared.
Continuity mistake: When Jim and Carole are at the drive-in restaurant, Carole's earrings are on when she is speaking to Jim. The earrings are off when she is speaking to the two hippies, then back on again when speaking to Jim again.
Continuity mistake: When Tennessee is hanging out of Herbie over a cliff, you can see that the number "53" is missing from Herbie's passenger door.
Continuity mistake: When Thorndyke is squirting oil at Havershaw in the garage towards the end of the movie, the amount of oil on Thorndyke's right shoulder changes between shots.
