The rain sensor is in the windshield somehow, thus creating the high price for a new windshield. At least, that's my understanding.
You are correct. We had the previous owner replace my wife's ES 350 windshield to the tune of $1,500, of which he paid $250 for his deductible.
I was told that the sensor is actually under the rear view mirror mount - not in the windshield... So I looked in the owners manual which has an arrow pointing to the Mirror mount. The sensor measure refraction of infrared light to determine the presence of rain. So is the stealership overcharging for a windshield replacement or does the sensor get damaged when the mirror is removed? Anyone know... Anyone replace their windshield with after market glass and still have the rain sensor work? If so, how much. I only have 1600 miles on my new 350 but I have always had bad luck with windshields so sooner or later the information will help. Thanks.