When K.I.T.T. and Michael visit the junkyard, the compactor is crushing the same two cars that it was crushing in the beginning of the movie.
The same classic white Volkswagen Beetle with a purple stripe, is visible in multiple unrelated scenes, including the mall parking lot, the hospital parking lot, and in traffic during the high speed chase.
When the villains spot Julie "driving" through the park, K.I.T.T. is always moving slowly; he never stops or parks. Yet when the car chase is about to begin ("Pedal to the metal, K.I.T.T.!"), K.I.T.T.'s lighted dashboard powers up as if he'd been turned off, and his gearshift moves from "P" to "D".
One of the suspects is identified as "David Dudley", yet K.I.T.T.'s dashboard display lists his name as "Larry B. Dudley".
The Black Porsche that KITT chases, is visible in the mall parking lot before it is introduced in the story, while Michael is looking for the proper parking space.
Guide dogs are well trained to never bark. Sugar (the guide dog) barks a lot without being corrected by Julie.
The blind girl wears a watch with glass (it reflects in one of the scenes) as is usual for most of us, but a blind person has a watch where you can feel the time.
Kitt doesn't allow just anyone into him and michael was knocked unconscious and kitts door was opened by some men and put michael into the car also kitts stearing wheel was a small round steering wheel.
When KITT flies out of the car compactor, a close up shot of his undercarriage is shown. But the aerial shots show that the undercarriage is smooth (i.e. it's not a real car, but something built to look like one)
When Michael brakes hard to avoid hitting the truck, K.I.T.T. has a very obvious dent in the front left fender.
In the final breakers yard scene when Michael and K.I.T.T. move to intercept Gastner in his car, a very large and obvious dent is clearly visible on the rear right-hand panel of K.I.T.T.'s bodywork.
The same VW beetle, painted with a single racing stripe, and not part of the story-line, can frequently be seen throughout this installment.
At about 9:20 a big dent in KITT's left front fender is visible.
The Foundation goes to great lengths to preserve the informant's anonymity--understandably since his employer has tried to kill him--but then Michael totally blows his cover by declaring he works for the Foundation and chasing the informant in front of his coworkers.
When Michael slams on the brakes to avoid hitting the truck while pursuing the shooters of John, the camera crew are reflected in KITT's door.
KITT misquotes Shakespeare. In reciting the most famous line from "Richard III" he says "now is the winter of my discontent" instead of the correct line, "now is the winter of our discontent."