I have had my certified 2010 Prius II, not two because it is a 2010 and 2010 used uppercase roman numerals for model designation, with 82000 miles about 3 months and sometimes when I apply the brakes I hear a high pitched whirring noise. I think the closest thing to compare it to would be a skill saw but not that loud. Any ideas of what it is and should I be concerned? Thanks.
This is normal you hear the inverter recharging the battery also know as regenerative breaking ... you probably can hear the pitch lowering as your speed decreasing... totally normal ...
