Professional Grade Disc Brake Pad Electronic Wear Sensor. Disc Brake Pad Wear Sensor. Established in 1959! Warranty Duration. 084-1602, 10020, 10026, 116.34015, 1406-51838, 20026, 2BWS0105, 34351164372, EWS143, PWS132, SEN-2BWS0105, URO-002587, V20-72-5106, WK346, WS332, WSA3164.