I've had this on my website for a few years... it fits in perfect in this thread


Aphrodite, you are right about the voice boxes, they are different between K.I.T.T. and K.A.R.R. The scanners are the same/or different depending on the show.
Season 1: Trust Doesn't RustVoice Box:-K.I.T.T. had the first season solid red box (not the LED bars).
-K.A.R.R. had LED bars in a green/yellow hue that is a different pattern than K.I.T.T. would eventually get in red LEDs
Scanner:-Originally the two cars were nearly 100% identical. The voice box and primary programming where the only difference. Both had read scanners in season 1 "
Trust Doesn't Rust." [Link to Hulu to watch the show!]
Season 3: K.I.T.T. vs. K.A.R.R.Voice Box:-In this show K.I.T.T. had his red LED voice box, K.A.R.R. the same as in Trust Doesn't Rust.
Scanner:-This show the two cars did differ. K.A.R.R.'s scanner turned color from red to a greenish/yellow/amber color. K.A.R.R. mentions in the show his scanner has suffered a reduction in obassity, one may take that as the reason for the color change - attributed to him being entombed in salt water and sand.
Paint:Also, K.I.T.T. and K.A.R.R. had different paint in this episode at a certain point. In the original version (some airings have the scene cut) K.A.R.R. states that he wishes to alter his appearance to John (guy that found him). Hence the two tone paint job he later has with grey/white-ish lower half.
Who's a Knight Rider geek? Not me..

heehee
P.S. Did you know that the original voice actor for K.A.R.R. in Trust Doesn't Rust was Peter Cullen? Yep, Optimist Prime himself