[mjr24]

I've had a couple squeals on my 22 X5MC and I'm at like 500-600 miles.

This is just normal. I've had a ton of new/higher-end M cars and they just simply all have squealed. There is literally a 25-page thread on pretty much every M model forum regarding squeaky brakes. I used to get mad about it but now just don't care......those who have silent brakes are the exception rather than the rule.

None of my non-M cars I've had in the past (including G30 M550i with M-Sport brakes) have made any noise.

I've heard everything from it's normal.....to it only makes noise if you don't brake hard enough.....to it's the pads, etc. At the same time, I've seen some dealers replace pads and rotors under warranty trying to get rid of the issue (which never worked). There are a hundred different theories.