Disc Brake Pad Wear Sensor. Electronic sensor wire. To confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in theCompatibility Table. This part generally fits BMW vehicles and includes models such as 128i,325i,325xi,330i,330xi with the trims of Base Convertible 2- Door,Base Coupe 2-Door,Base Sedan 4-Door,Base Wagon 4-Door.