PWS is a continuous wear sensor that monitors pad wear and provides continuous data to the vehicle system. PWIS is a digital sensor (switch type) that will give the vehicle system a signal when the brake pads reach their wear limits and need to be replaced.

  • PWS (Pad Wear Sensor = Black housing)
  • PWIS (Pad Wear Indicator Sensor = Grey housing)


The PWS/PWIS should always be manually set to its start position when changing to new brake pads, to be able to compensate for disc wear during each pad change.

For details of installation and setting, see section 4.4 in the ModulT Service manual.