Character mistake: When K.I.T.T. is talking about rubies he refers to them as a crystalline form of carbon. Ruby is actually crystalline aluminium oxide.
Knight Rider (1982)
1 mistake in K.I.T.T. the Cat
Michael Knight: I need ya buddy.
KITT: Right away Michael.
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.
More questions & answers from Knight Rider
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