Originally Posted by Bill B.
Really? What year 135i?
2008, but they all have the same brakes. Stopping distance were okay, but pedal feel and heat soak were a big problem with them. This has been common with recent Brembo fixed caliper setups. The ceramic pistons on the 135i, pads on the 370Z and general design on the STI and EVO setups have all caused various issues.
BMW's normal single piston design may not be glamorous, but they do work fairly well. I'm not sure what BMW's goal with the 135i brakes was, maybe they just knew it would be a relatively small sample and they were testing whether multi piston setups made much of a difference in terms of the covered maintenance interval? I suppose they do seem to have adapted more multi piston setups, with the F30 335i going to them and the M5. I assume the F80 M3 will come with them too.