The sensor only 'triggers' if it comes into contact with the disc. The sensor is metal, the disc is metal and makes a circuit (or dead short; one of the two) if they touch. Chances are your sensor was sitting incorrectly in the groove (cut-out) on the pad, or the little spring has moved or disappeared. Nothing to do with mileage.Portisz4 said:
The sensor will be knacked if it has touched, so this will stop the service reset. Just change the sensor, make sure it is sitting in the groove properly and at the rear of the pad.
The service indicator is not based on any actual data from the brakes. There is nothing to measure the depth of the pads, or disc thickness. The sensor is a 'last line of defence' to indicate the pads are physically low and need changing.
