KITT And KARR
Every good show has a good and bad element to it, and KITT had an evil enemy. KARR which was known as the Knight Automated Roving Robot. Both cars were mostly identical except for the paint job and the story. KARR wasn’t featured in a lot of episodes so when it did come on the screen it was a surprise (via Knight Rider Historians).
KITT always came out on top but the fact that there was a rival car was a pretty cool aspect. KARR never gets a good deal of attention and most people who aren’t fans wouldn’t recognize the car at first glance.