The Pagid Disc Brake Pad Wear Sensor Set - 355251581 is a set of sensors designed to detect the wear level of disc brake pads. These sensors are compatible with Pagid brake pads and are used to monitor the thickness of the brake pads. When the pads reach a certain level of wear, the sensors will trigger a warning light on the dashboard of the vehicle, indicating that the brake pads need to be replaced. This helps prevent potential brake failure and ensures the safety of the driver and passengers. The set includes two sensors, one for the left and one for the right brake pad, and is easy to install. It is a reliable and essential component for maintaining the proper functioning of disc brakes.