Originally Posted by BMW M Power Mexico
Your guide rocks! I just finished doing my first pad job and it went very well following your guide. While doing this I noticed quite a few hairline cracks around some of the disc drilled holes, so it seems I might have to replace rotors soon. Do you know of any good DIY guide (like this one) to replace rotors?
I am not aware of a DIY, but check the E90 DIY page. They might have some, and I think the assemblies are similar. You'd have to remove the carrier, and the rest should be fairly straight forward. You do need to raise the car high to be able to comfortably remove the larger nuts holding the carrier in place though.
A few short cracks is OK. I would keep an eye on them. When they spread around and catch your fingernail easily, it's time to replace them.