Brake Booster/Pump Questions (2011)

Recently, my (2011) rear driver (left) brake pad burned through the ceramic on the pad in a few days. I replaced the wheel bearing (overdue), rotor, free'd up the guide pins on the caliper bracket. It did not seem to fix the issue. Caliper piston did fight me when compressing it more than usual. I plan on installing a new caliper, a new brake hose and I plan on flushing/bleeding the brakes.

I am concerned that if this does not fix this issue would this be the dreaded brake booster/pump issue? What symptoms can I look out for? At this time I do not have any dash lights but have not driven my Prius much in the past few weeks.

^see minute 2:40 on in this video. I am getting this noise when I open the door. I am also getting this noise when the car is off and I press the brake. I do not seem to hear it when the car is on, but I had a lot of noise pollution when I tried listening for it when the car was on.

2011 Prius brake noise - YouTube
^this is pretty much the exact noise I am getting when I was coming to a stop. In this persons comments, he said he had to replace his brake booster assembly.

 

Thanks for the reply!

My mind went to the worse case scenario (brake booster assembly) and I was trying to prepare myself in the event that turns out to be the problem.

I'll update shortly.

 

Issued solved:

It seemed grinding down the brake pads a touch and lubing them out really good was the issue. It could have potentially been brake hose, as I replaced that too but the other one looked to be in good shape. I did not end up installing a new caliper.