[MiniCookie]

I am around 1200 miles, and I would consider it is completely break in. Recently when I am backing my car and holding the brake, I constantly hear the high pitch noise come from the brake. I did a little search, it seems normal to many M badged models, and then I even brought my car to service ask them to check, they didn't check at all told me it is normal right after I described the issue, just want to check if anyone else experienced it in their G45? Still concerns me a little somehow.

[Mcssls]

Performance brake pads do that. Worse when cold a new. It gets better but will happen at times.