Then it is a nuisance noise the pads make when lightly rubbing on the rotors. That happens occasionally.The community assistance here is great, but I think there's something we're missing. Here's what I know:
- I have heard the sound as described by mrblint recently in my own car, assuming I have understood the description correctly.
- The sound is noticed when there is no pressure on the brakes and disappears when pressure is applied, and the speed of the audible cycle correlates to the speed of the car.
- What I hear is more of a scrape than a squeak. You could achieve a similar sound by running a knife or maybe a whisk around the edge of a steel skillet (and maintaining constant contact).
- I have driven several thousand miles since I first heard it, including city and highway, so any gravel or small rocks should have been thrown out long ago.
- My brakes have not shown any abnormality in performance. No noticeable pedal drop, unexpected feedback, or increase in braking distance.
- I had my brakes checked last week, and where the dealer recommends replacing parts when the pad measurement is 3mm, mine were all at 6-7mm, so it's definitely not a brake pad end-of-life warning.