Other mistake: The chemicals in the pool eat the seats, including the metal hardware, the steering wheel, and all the electronics, but the tires remain intact, and inflated.
Suggested correction: Molecular Bonded Shield protects KITT's exterior including tires, while his interior isn't protected. Therefore, his tires haven't been destroyed by acid.
Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (1) - S1-E1
Revealing mistake: As KITT backs away from the guard after Michael jumps in, skid marks where there were other takes.
Suggested correction: As he drives away, you can see the parking lot has skid marks all over the place. It's impossible to say they came from other takes.