Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (1) - S1-E1
Deliberate mistake: Watch the scene when Michael fell asleep. At the end of the cop chase the cops get out. Watch the license plate California KNIGHT in yellow letters. The next scene reads Nevada MCC224 and has an original Trans Am rather than KITT's rear.
Slammin' Sammy's Stunt Show Spectacular - S1-E5
Deliberate mistake: Watch the end of the test run for Michael and KITT. Michael was using the KITT steering wheel, but then he gets out of the car and it switches to a performance steering wheel instead.
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