[Kong Sheng Han]

Originally Posted by silvergray545

I'm not sure either. I never had pad transfer issues when I ran Hawk pads. My rotors are seriously ugly looking. I might sand them down and rebed them.

Don't. PFC pads don't require bedding fyi. I would suggest just purchasing new rotors. Drilled rotors look ugly anyways.

[omasou]

I just so happened to change the front brakes on the X5 this weekend.

Since I change my own brakes, I always change the pads and rotors b/c 1) I don't want to worry if the rotor will be past minimum thickness before the second set of pads wear out 2) the work to go back in and change out the rotors and not the pads "to me" is not worth the effort or cost savings.

For background, while under warranty the dealer replaced pads and rotors on the front and pads only in the rear.

I have a Starrett Disc Brake Micrometer and took a couple of measurements.

These are for Brembo front rotors...

New: 30.40
Min: 28.40

D/S worn: 27.08
P/S worn: 27.12

So for the front when the pads are worn the rotors need to be replaced.

[M3 Number 86]

Cheaper at a trust worthy shop. Cheaper at home. It's literally one (or two) screw pins, and two bolts for the caliper. Ten minutes each side.