Exterior rear view mirror is broken but only the glass where can get a replacement for it but dont want to change the whole system just the glass your Toyota Highlander is year 2003 with heated glass?
I was able to order one at the local Toyota dealership... just the glass insert. They gave me the wrong side so I haven't poped it in yet, but it was only $50. To replace the whole side mirror I was quoted $450.
Another choice, try to find from "http://www.jawaindustries.com/products_mirror_glass.html" to see if they have the same model of mirror glass