Car has 86K miles, new front OEM pads at 67K miles, did not replace brake pad sensors. Original rear pads. Got the brake/car elevated on a lift error today. Fluid is full, thinking it could be the sensor going bad/breaking or the rear pads. No issues in braking performance driving today. Any other thoughts ?

 

or the sensor was tripped, the rear brake pads typically go first since the rear brakes is used for the DSC system, but I haven't had that much exp with the r60 yet, so maybe the all4 system helps the dsc from engaging the rear brakes. but im sure the rear sensor has been tripped. they have tripped on my r53 and my gf's r56 at like 1/2 brake life