[Mrg0721]

Ponach has got it, but by clips i think he means SENSORS, brake pad wear sensors to be exact. My e90 has the front sensor in the left front and the rear in the right rear... These are a must if you are changing your brakes. Once you get the warning to change your pads, the sensors, have worn down just like the pads, have been triggered and that warning/error you now have will only reset itself with new sensors. News pads = new sensors
Not sure where you are located but where i live they run about $17 for oem bmw. No aftermarket cr*p!