Noticed a high pitched squeal/whistle with the windows down in the last week or so. I knew the discs were a bit warped, so I've had them replaced and new pads. However, the squealing is still there?
It only starts above 30mph or so, and once starts it lowers in pitch for a few seconds and then stays at the same pitch. It stops (after going back up in pitch) as I go back below 25ish.
The pitch doesn't change with speed, and it doesn't seem engine related - no squeal if I just rev the engine when stationary.
Are the break pad wear indicators built into the pad, or do they need replacing separately? I assumed it was the pad wear sound, but now I'm thinking it might be something else?
Braking is fine (no more wobble), there are no scraping noises and there is no pull to either side under braking...
Any ideas please?