Quote Originally Posted by silver-e34
the proper way to do it is replace all 4 pads as sets and either replace the rotors if they are below spec thickness or have them turned at a machine shop but never install new pads without new rotors or at least turning you old ones
Ha... Done it couple time, on almost all my cars, with no problems... I have Brembo x-drilled rotors in front and just changed the front pads this summer. The rotors were well within specs and looked good. I didn't even take them off....

I believe it's all in the breaking period...

Jeff