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Brake Pad Wear Sensor


Brake Pad Wear Indicator is a safety feature that will enable you to show a warning in the dashboard that your pads are already worn out. This signal is a small wire installed on your brake pad that gets in contact with the brake disc. A brake pad wear indicator indicates if brake pads are in old condition. Usually, it is a device that gets grounded once it touches the brake disc.

  • The Brake Pad Wear Indicator is a monitoring device that will alert the driver before the brake pads reach their worn limit, which usually appears on the dashboard panel. Some brake pad wear indicator comes in a small piece of metal that sticks out next to brake pads and grinds against the rotor.
  • If the grinding, growling, or screeching sound from your brakes is noticed, it could be a sign to check the wear on the brake pads and fix if there is something is wrong. In most cases, the brake pads should be replaced every 10,000 to 20,000 miles to keep wear to a minimum. However, to keep the brakes in good shape, it is recommended to replace the rotors every 50,000 to 70,000 miles.

Variations

The following are the different types of brake wear indicators

  • Ocular requires manual inspection wherein the reference for replacement is the cut mark made from the surface of the brake pads 
  • The Mechanical indicator has a metal plate placed together with the brake pads; If the brake pads reached has worn down the contact in between will cause a squealing noise when brakes are applied
  • Electrical Brake Pad wear indicator has a metal body in the brake pads surface that contacts with the rotor disc, wherein, if the brake pads are already worn out, this will send off a signal to illuminate the warning indicator in the instrument panel or cluster to remind the user.
  • Position Sensor contains a sensor that functions to measure and indicate the mechanical position of the brake pads