Disc Brake Pad Wear Sensor. PowerStop - Front Electronic Brake Wear Sensor. This part generally fits BMW vehicles and includes models such as Z4 with the trims of M40i Convertible 2-Door,M40i First Edition Convertible 2-Door,sDrive M40i Convertible 2-Door,sDrive20i M Sport Convertible 2-Door,sDrive20i Sport Line Convertible 2-Door,sDr ive30i Convertible 2-Door.
