Thanks for your response!
I apologize for the lack of information provided. The S is 2007 with about 50K

I do realize that the brake pads have slight contact with the rotor and the noise it makes is fine.

The noise that concerns me is the squealing towards the end of wheel spin. It is more audible when I am in the car and it creates the noise when coming to a stop at slower speeds.

 

50K on original wheel bearings is not likely a problem. 50K on original brake fluid and no slider pin maintenance could be if the fluid has never been changed or if it was changed poorly. Audible noises from such sources will change as the speed of rotation changes because friction changes.

 

Yes, I am probably due for a brake fluid flush, but what is the slider pin you speak of?

 

If you go to that link I put up, it's these:


The caliper slides (left/right) on these pins. Not only does this allow the pads to press evenly on the rotor from both sides when brakes are applied, but it also allows the pads to pull away evenly from the rotor. Failure to slide would cause a pad to stay pressed up against the rotor more than they should.
If the rubber boot is damaged or if one has become detached from the boot lip, dirt will infiltrate into the pin sleeve and cause them to partially seize. Part of "maintenance" is to visually inspect these boots and correct any deficiencies when seen. That may include fixing the damaged boot and removing the pin, cleaning it and re-greasing it.

You can see these boots here with one of the pins partially pulled out:


As you can see in that link, the pads are in fact, always touching the rotor. They will always make some sort of rubbing noise when the rotor turns. However, if they are not able to fully release or if there is some debris caught between the pad and the rotor, the noise can become much more obtrusive. The sound in your video seems indicate that there is more noise than usual. At least eliminate the brakes as the source of the noise, then go to the next step and look at the bearings (unlikely).

 

I know this is old but what was the cause of the issue? I have an 07 with 50k and I just started getting the same noise intermittently. I've never had the brakes serviced.