A Knight in Shining Armor - S2-E13
Other mistake: After stopping Stone, Michael calls for KITT. When the car starts up, it's in gear, and the selector goes to P (park). After pinpointing the hidden entrance, the picture is of soft sand hills covering it. When KITT goes to enter, it's a defined entrance with a thin layer of stacked rocks in it.
Mouth of the Snake [a.k.a. All That Glitters] (1) - S2-E21
Other mistake: At about 7 minutes into the show, you see a US border sign in English and Spanish lying on the ground. The English version says "500 yards ahead." The Spanish version says "150 metros" which is roughly 500 feet, not 500 yards. It is also not clear why a sign fairly far on the Mexican side would have English text at all, especially with wording that is more typical of US rather than Mexican signs. (00:06:49)
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