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Alan,
Nice X5, from Australia.
I upgraded my callipers, rotors and pads from 30dMsport (Australia) to callipers & rotors off a M50d -we get the M50d in Aus. (could not afford the Mperformance brakes. Did the job myself. No change to pedal position, however yes the pedal did feel a little softer, weird, however given the better pads and larger braking surface area, they feel softer because you simply don't have to apply as much pressure to stop. I did a second bleed to double check, however no change. Give it a couple of hard brakes and then you will see the difference, the pedal gets firm real fast. I did no coding up grade, can't see how that would change anything as its a mechanical item (force of oil down a brake line). However interested to know if this is required and why tho. Post some photos. My work below.
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