In the beginning long shot of KITT driving down the highway, KITT is in T-Top mode. When the close up shots with Michael come on, the car is a convertible.
The P.A. announcement states the the yellow flag is out on lap six and there are 100 miles left to go, then immediately says after 180 laps it's still anyone's race, and there's just 8 laps left to go.
When Michael arrives back at the track to race, the P.A. announcement makes reference to Formula 1 cars, despite the fact the cars are not Formula 1 cars, and the race is nothing like as high profile as a Formula 1 event. Earlier there was reference to an "Indy 500" style race, but without using the Indy name.
When Michael and K.I.T.T. are dueling with Tunkel's car, K.I.T.T.'s nose section is a very bad fit, with a large gap between the nose and the hood. Clearly a hastily modified sacrificial stunt car and not the hero car.
When Tunkel tries to hit Michael and Elena with his car, the side window of the red car shatters before Tunkels car actually hits it.
Michael asks K.I.T.T. for oxygen at 20 P.S.I. despite sitting in the car with the side window fully wound down, making the supply of oxygen a fairly pointless endeavor, no matter the pressure.
K.I.T.T.'s grappling hook button is labeled "GRPLG. HOOK" despite the fact there is ample room to just label it as grappling hook.
K.I.T.T.'s Passive Laser Restraint System button is missing the dot over the "i" in Restraint.