Tech Tip – Rain Sensing Wipers – Be Careful On Windshield Replacements

Just spent the better part of a day with a BMW having an issue with the automatic rain sensing wipers. Problem, the incorrect windshield glass had been installed by the insurance company.

Should your auto require a windshield replacement, it is very important the correct glass be installed. When in doubt, check with us, or the new car dealer to be sure, here’s why.

How They Work
Many newer vehicles are equipped with rain sensing wipers. The wiper-switch may be left in the automatic position on these models. When rain hits the windshield, the wipers come on automatically. This may seem very high-tech, but the principle is quite simple.

More Tech
A small electronic module near the top of the windshield is the brain of the rain-sensing system. Multiple light-emitting diodes (LED) transmit infrared beams. The dry surface of the windshield reflects this light. Other chips within the module receive the reflection. The amount of light reflected varies the voltage that flows through this device.

Here’s The Problem
If the incorrect glass is installed, your automatic wipers may not work, or not work correctly. Removing and reinstalling the correct glass is a major and invasive process, something that you want to make certain is done right, the first time.

Solution
Should your auto require a windshield replacement, it is very important the correct glass be installed. When in doubt, check with us, or the new car dealer to be sure.

Questions, or if we can be of further assistance, please just call (207) 882-9969.

Thank you!