My rear wiper failed yesterday, it went on its first swipe from driver to passenger side and kept going...Got out in snowy traffic to find it dangling like a pendulum over the license plate! Then it wouldnt stay in postion on the back glass, had to get out again and put it in the 12 o'clock position and continue commute w/o rear wiper. there was no pressure or snow on the wiper, just road water, etc. So no reason to fail. Frustrating.