2007 Lexus RX 350 • 6 cylinder 2WD Automatic • 25,000 miles

A strip fell off of the backside of my rearview mirror. It is a an adhesive strip which is black facing the winshield and on the underside there is an electrical circuit embedded into the white plastic. It was attached to the lefy upper part of the mirror and there was no apparent connection under the strip.
What is this? Is it an essential part? Can I glue it back or does it need Lexus to replace it?
Karl Morgenstein
January 8, 2011.

If it was glued in place origionally, I'm sure it will work again.