Revealing mistake: Just after Michael is about to be rammed by the two Land Rovers, he jumps onto K.I.T.T. and gets inside. The film must have been reversed as he is sitting on the right-hand side, but when it cuts he is then shown to be sitting on the left-hand side.
Revealing mistake: When Michael and K.I.T.T turbo boost the flame thrower and disable the fire engine, Michael says to K.I.T.T "get the clown." During the shot prior to K.I.T.T pinning the clown in you see the hands steering K.I.T.T appear above the dash.
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