Originally Posted by enigma
I should add by biggest gripes with BMW brakes is not the number of pistons they have or the weight of the setup. The have/had two major flaws.
1: Poor airflow to the rotor which prevents proper cooling of the rotors. Its the high temp that they reach that causes the fade and rapid wear of components.
2: The pads are a royal PITA to change. Why do I have to unbolt crap to change the pads? On proper calipers I pull one or two pins and just slide the pads out.
I have not tried to change pads on the E92 but I know that on my previous E30 race car we could change front pads under a caution without losing a lap.Remove 1 bolt and swing the caliper out of the way and push the pistons back at the same time and you were good to go in under 3 minutes.