Slammin' Sammy's Stunt Show Spectacular - S1-E5
Revealing mistake: As KITT goes into ski Mode to show Sammy what he can do, the stunt driver is obvious, and there's a bar mounted on the door just back from the driver's mirror for the driver to hold on to. Also, the regular steering wheel is easily spotted through the windshield.
Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (1) - S1-E1
Continuity mistake: If you look closely at KITT throughout the pilot, the position of his scanner lens changes from being the normal scanner that we're all used to, and the scanner being at the very tip of the front bumper. (The latter case is because the car was used for a promo shots to sell to NBC, and after the show was picked up, they changed KITT's look, but still used the earlier shots).
Slammin' Sammy's Stunt Show Spectacular - S1-E5
K.I.T.T.: Really, some people are simply too much.
Trivia: David Hasselhoff, who plays Michael Knight on Knight Rider, was married to Catherine Hickland from 1984-89 and in 1992 Catherine married an actor whose real name is Michael E. Knight.
Answer: I would say that unless there's visual evidence it was another K.I.T.T. car, as in you could see the bar scanner or cut steering wheel, people on here would correct the mistake by saying more than one 1982 Pontiac Firebird Trans-Am was sold and there's no reason it's meant to be a random car.
Bishop73