Brake Wear Sensors are used to warn the driver of a vehicle that the brake pads are in need of replacement. Brake Wear Sensors are installed into a vehicles brake pads and wired into the vehicles notification system. When the brake pads wear to the predetermined level the driver is notified that it is time to have the brake pads and wear sensors replaced. Brake Wear Sensors have been historically used on European Imports and more recently on higher end Asian and Domestic Models. PerfectStop by Holstein Brake Wear Sensors are manufactured utilizing the highest-quality reinforced plastics able to withstand temperatures up to 400 degrees C With more than 300 part numbers covering over 99% of applications throughout North America, PerfectStop by Holstein is sure to have the sensor you need when you need it 3 Year / 36,000 Mile Warranty on PerfectStop by Holstein Brake Wear Sensors Holstein Brake Pad Wear Sensors are direct OE replacements with perfect fit, form and function for flawless operation