Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (1) - S1-E1
Revealing mistake: When KITT takes part in the race and goes up on two wheels, you can see that the stunt driver is behind the wheel and that a dummy is strapped into the passenger's seat.
Continuity mistake: Even after KITT's voice modulator changes to the three bars in the episode "Hearts of Stone," any shot of KITT starting himself up still shows the old voice modulator (a simple red square).
Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (1) - S1-E1
Continuity mistake: If you look closely at KITT throughout the pilot, the position of his scanner lens changes from being the normal scanner that we're all used to, and the scanner being at the very tip of the front bumper. (The latter case is because the car was used for a promo shots to sell to NBC, and after the show was picked up, they changed KITT's look, but still used the earlier shots).
Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (2) - S1-E2
Continuity mistake: During Comtron's Demolition Derby, Michael engages auto control. Michael controls the wheel during the ski mode stunt. When the car drops back on four wheels, Michael is driving with a regular steering wheel instead of KITT's steering wheel.
No Big Thing - S1-E8
Visible crew/equipment: As the truck Devon is driving jumps the chain link fence, the helmeted and harnessed stunt driver is easily seen.
No Big Thing - S1-E8
Continuity mistake: At the end when Michael is driving Devon in K.I.T.T, there is a truck behind Devon which isn't behind Michael, depending on who is talking in the shot.
Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (1) - S1-E1
Revealing mistake: There is a scene where KITT drives over to Michael, and you can see the drivers seat is really a guy dressed up in a light brown suit to look like a car seat. You can see for a visor that its a glass panel made to look like a hollow head rest, but you plainly see the guy take away his hand off the steering wheel.
Continuity mistake: When Michael and K.I.T.T. go to rescue LT. Ladd off the firing range,the steering wheel isn't K.I.T.T.s usual steering wheel, it has metal bars coming out to the handgrips.
Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (2) - S1-E2
Revealing mistake: During the Comtron Demolition Derby after Buddy sprays oil, Michael asks him not to push another button. Buddy decides to push the next button for Smoke Screen. The license plate is mirrored THGINK (instead of KNIGHT) before the smoke blows.
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.
Factual error: A secret file is password-protected on a computer, requiring a six-digit numerical access code. KITT states that the possibilities "are virtually unlimited." In truth, if each digit can be 0 through 9 (numerical meaning no letters or symbols), the possibility is 1 in 10^6, or 1 in a million. A supercomputer like KITT should have no problem running each number systematically until a correct code is found.
Continuity mistake: In the first few episodes watch KITT's glowing square. In some scenes the flasher says KNIGHT 2000 and other times it does not.
No Big Thing - S1-E8
Visible crew/equipment: At the end, as KITT goes to jump the camper, there is a set of what appears to be mirrors to hide the obvious ramp.
Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (1) - S1-E1
Revealing mistake: During the demolition derby, the shot of KITT releasing his smoke screen is flipped; you can see that the license plate is backwards.
Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (2) - S1-E2
Revealing mistake: After KITT has been taken by the crooks, KITT auto cruises. Watch the spin circle showoff in slow motion. KITT is spraying gasoline out of his side tank all over the road as he's spinning circles.
Visible crew/equipment: When the vehicle drives into the equestrian centre with the brown horsefloat on the back, you can see the shadows of the camera crew on the ground.
Revealing mistake: When KITT is in the valet carpark, he pushes the cars in front of him forwards. It is very obvious they have attached rubber protectors to the bumpers to prevent damage. Also, when KITT is driving by himself 10 seconds later, you can see the stunt man's hands driving the car.
Knight Rider [Pilot; a.k.a. Knight of the Phoenix] (2) - S1-E2
Continuity mistake: As Michael realises how he will be stopped on the way to the airport, he pulls over. KITT's front lower bumper does not have its spotlights, it is just a plain bumper.
Character mistake: The sign in front of the tank Lt. Ladd is trapped in reads "ORDINANCE TESTING FIELD, DANGER.", but an ordinance is a type of decree or law. They probably meant 'ordnance', which is another word for artillery.
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