After upgrading my brakes ON MY R53 to R56
JCW all round, now have a situation where, under normal braking, the ABS cuts in even at low speeds causing a judder as the braking is interrupted and dramatically reducing the braking effect, not very nice in traffic! Eventually the ABS, TractionControl and Tyre pressure lights come on and normal braking is restored, I guess in 'Safe mode'.
Sometimes, hitting a speedbump will trigger the warning lights.
I haven't tried to see if the ABS or Traction Control still works when the warning lights are on, maybe I'll go out later and try.