Hi Guys, 2011 Prius, ~200k miles. 90% highway driving at this point. Left rear inner brake pad is worn to the squeal part, but left rear outer brake pad is essentially full. Right rears are both essentially full, and of the thickness of the outer left rear. Replaced pads 30k miles ago, and greased at that time. I have a memory I noted uneven wear once before. The caliper is properly rotated to clear the pin. I also take the brakes apart and clean grease them every 30k miles or so. Anything else other than a frozen caliper? -kehyler
Probably not if you can pull the caliper with the pads not in place and all that across the slide pins with your pinky or your middle finger or something you should be good . Calipers can be tricky at over 100k might be good to do .
^That's a good point, when I was poking around the brake pad had to be pushed off really hard. I'm going to replace the pads and see if that solves things, ensuring this time that the pads start life really free. A frozen caliper seems like it should be wearing both pads evenly.
I just wrote quite a bit this morning about these kinds of problems over here. In my experience, the most common causes of the pads not moving freely are the springy clips (collectively called the "fitting kit" by Toyota) that sit in the notches of the caliper mounting bracket (not the caliper itself), for the ears of the pads to slide in. In the post I linked to above, pay special attention to the parts about the fitting-kit clips getting old and rusty, and also about how the mounting-bracket notches can get rusty and put the squeeze on the fitting-kit clips so they end up clamping down on the pad ears.
