K.I.T.T.'s most obvious external feature is his front scan bar, or Anamorphic Equalizer.
The equalizer device is a fiber-optic array of electronic "eyes". The scanner could see in all visual wavelengths as well as X-Ray and infrared. When K.I.T.T.'s surveillance mode was active, the bar would light up and make an ominous swooping sound as it panned left and right. Occasionally, the bar pulsed in different patterns and swept either rapidly or very slowly. K.A.R.R. also had an anamorphic equalizer.
According to Bonnie it is possible to disable K.A.R.R.'s electronics by penetrating the equalizer with a laser (Episode 108: Trust Doesn't Rust). Presumably a similar possibility exists for disabling K.I.T.T., making this one of his few vulnerabilities.
The new K.I.T.T. has a similar equalizer feature.