I was actually just going to post in here regarding the same ongoing issue. My car is at the dealer now. I brought my 335i in 3 times 8 months ago and they replaced the front pads after much hassle. That was when I was under new car warranty. Long story short, the awful squeal is now back. My service guy told me that they won't replace them since there's 8k left on them and I'm out of warranty. He suggested new pads and new sensors. Please help as I don't know if my alternate bodyshop can do this new method.
Thanx so much in advance. I really hate the car because of this