My '07 E90 went to the dealer 3 separate times for the brake wear sensors telling me it was time to have them serviced. It was just an annoying glitch.
I swapped my pads at 45000 km for cool carbons along with new rotors and still had plenty of life in the oem pads.
'07 e90 335 (retired)
'12 f30 335 Sport line