I'm not a 3 owner yet but looking into it. So i'm reading these
forums to get a feeling about problems ppl face with it.
Now about the excessive brake dust on the rear brakes compared
to the front ones: i've read on a report of a guy that did a test
drive that he observed that the car wasn't 'digging' as much
when braking hard, that is the car wasnt lowering its 'nose' under
a braking condition. Thats a good thing from a car dymanics point
of view since it keeps the car balanced etc. So, since the car's
braking system is controlled by the EBD system, *maybe* this
behavior is what Mazda engineers wanted. Maybe they make the
rear part brake more than the front to equal the inevitable
distortion of the car's balance during a brake. Just an opinion...