Trying to save others some time & headaches... You don't have to go to the dealer for a replacement rear wiper blade on the Ford Flex. It looks like the blade and arm are one piece but if you look closer, you'll see the wiper blade can be replaced and its actually quite simple. It's a special rear wiper blade though. There may be other alternatives, but the "Trico Exact Fit Rear Integral Blade" snaps right onto the special rear arm and looks like the factory original. You can find it online. Much cheaper than the dealer alternative and easier/less tedious than messing around with rubber blade refills. Comes with removal and replacement instructions too. Hope this helps.