Continuity mistake: When Nicole takes Whitfield for his first ride in Herbie, the car rears up onto its back wheels. But in the very next shot of Whitfield's startled reaction, the rear-screen projection of the street behind them is footage taken from a level view, not an elevated one. (00:15:50)
Continuity mistake: When Herbie is next to the surfer on the sea at the beach, in a close-up Willoughby and Nicole are sitting in the car, but in a full view the car appears completely empty.
Continuity mistake: When Nicole takes Willoughby for a ride in Herbie for the first time, in the rear window it's clear the car is travelling through the streets of San Francisco, but in the previous shot the car was travelling through streets with no houses on either side.
Continuity mistake: When Herbie is taking Nicole and Willoughby to the beach, Nicole is driving and Willoughby is in the passenger seat. When we see Herbie turning towards the Golden Gate Bridge, you can see Nicole (wearing a powder blue top) in the passenger seat. This is a recycled shot of Herbie driving Nicole and Willoughby to the chicken tournament earlier on in the film.
Continuity mistake: When Mrs Steinmetz activates the window cleaning machine to fill Mr Hawk's office with soap and water, Mr Hawk grabs hold of Willoughby and you can see Willoughby is covered with soap. When Willoughby runs after Herbie a little later on, he now appears completely clean.
Audio problem: When Herbie is pushing furniture on to the two security guards at the warehouse, the first security guard yells "Look out, Smitty! Run!" but his mouth does not move.