Disc Brake Pad Wear Sensor. This part generally fits BMW vehicles and includes models such as 525i,528i,540i with the trims of Base Wagon 4-Door. The engine t ypes may include 2.5L 2494CC 152Cu. l6 GAS DOHC Naturally Aspirated,2.8L 2793CC l6 GAS DOHC Naturally Aspirated,4.4L 4398CC V8 GAS DOHC Naturally Aspirated.