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
Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (1) - S1-E1
Devon Miles: Welcome aboard the Knight 2000.
Michael Long: Thank you. What's all this? It looks like Darth Vader's bathroom.
Devon: It's a one-of-a-kind car, Mr. Long. It is the fastest, safest, strongest car in the world. It is also completely fuel-efficient and it is operated entirely by microprocessors, which make it it virtually impossible for it to be involved in any mishap or collision. Unless, of course, specifically so ordered by the pilot.
Michael: Pilot? Don't tell me this thing flies.
Devon: No, but it thinks.
Michael: It thinks? My car thinks?
Devon: We like to think of it as our car.
Trivia: Even though William Daniels provided the voice of "K.I.T.T.", he was uncredited throughout the whole series.
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