severe condensation in headlights Water build up in headlights can reduce visibility, and cause more electrical issues, malfunctions. Both headlights have been replaced by dealer on separate occasions. My driver side headlight a year and half later is now filled with condensation again. First headlight (driver-side) showed condensation about one year after ownership. The second (passenger side) about eight months later, and now three and a half years later the driver side headlight has condensation again.