Our Prius v squeals like a pig! The sound is best described as the rear brakes rubbing. Does it sporadically but is sure to do it when the temperature is lower (below 35 degrees). Stops after a about 300' of wheel turning distance. Took it to the selling dealer who could actually reproduce the problem but says they can do nothing about it. According to the service manager and Toyota regional service manager, it is rust being worn off the calipers/brake discs. This is just something we will have to live with. They can't back off the brake adjustment because then we would have to pump the brakes to apply them??? The car is embarrassing because it is loud and everyone who hears it looks, stares and/or points. Once again according to the service manager, ours is not the only one doing it as he has another on the lot (new) that is also doing it. A little disappointed to have to deal/live with this.