Hi there guys.

 I've a bit of a weird one.

A couple months ago I noticed on medium to hard braking the fsn brakes are making a very harsh grinding noise.

First think first checked for any stones stuck, nothing.

Then I began to notice that there where two separate rings on the brake discs that looked like there was something stuck in the pads causing a ring indentation.

Off came the pads, but nothing but smooth.

I though maybe a full break pads and disc change would sort it all out.

Having done a whole swap, the sound is still there, maybe even more so at a lower pressure of braking than before. There might even be a slight hint of ring indentation as mentioned above agin, but I've only taken her for a quick brake test so won't know for sure yet.

What's next to check/do?  Would a calliper issue cause this? Some kind of rust on the hub etc?

Here's a rough video of the sound, braking at 13 seconds in, that's a watered down example of the sound, it doesn't have the grinding sound to it on the video. (It almost sound like the previous cars drilled brake sound in the video tbh).

Shared via Amazon cloud so will need to link click sorry.

https://www.amazon.co.uk/clouddrive/share/tEk6YrVJWlt0I9NYswml77SLbHDcmoOS9JjcRuiFCJF?v=grid&ref_=cd_ph_share_link_copy

Took everything off again this afternoon, cleaned everything that needed cleaning and put everything back.

No obvious play from the wheel when off the ground.

Had a quick drive, and not only is it still there, I would say it a smidge worse than before.

If I was a betting man I'd put 40% on wheel bearing 60% on a seized calliper, but none of the symptoms fit well.

Loose rear stone guard rubbing on the disk. Might be falling forward when braking?

 

Don't know how old your car is to guess if this is possible. A guard on mine came loose at about 6yr old and would rub on the disk. Clanged as well.

Had the same issue, it was caused by the worn discs, repleced them gor EOM part and noise gone....