Unit was removed from a 2009 GS350 but the wire plug has been cut. You will need to split the wires and transfer your existing wires and plug from the bad mirror to this mirror. The auto dimming will darken the mirror automatically when the cars behind you or on the side is too bright or with high bean as well as cars from opposite direction with to bright headlight or high bean. It will then clears back to normal when the brightness reduce from cars in front or behind automatically. The compass displays will read out the following direction to make sure you are on the right place when driving or search for an address or place.It will tell you which direction you go such as East, West, South, and North, SE, SW, NE, NW. This is the upgrade model mirror. Dealership will cost over a few hundred dollars just for the mirror + time of installation. It is easy to remove and mount the new one on yourself without the technician. Good Luck and thanks for looking.... The item "FACTORY OEM 06 07 08 09 LEXUS GS300 GS350 AUTO DIM REAR MIRROR COMPASS HOMELINK" is in sale since Sunday, December 29, 2019. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Interior\Mirrors". The seller is "iwinyourbid14" and is located in Sunnyvale, California. This item can be shipped worldwide.