About a year and a half ago, I needed to replace the windshield on my Cadillac. Ever since, my wiper rain sensor wouldn't work. I called them back (Safelite Glass has a lifetime warranty) and they came out today to inspect. The kid didn't know what to do so he called his boss. He went to his truck and came out with a 1 1/2" plastic ring with "rain sensor" on the package. He installed it in the box behind the rear view mirror, and now it works perfectly. Newfangled new car crap.