Brand new OEM tire pressure sensor, BMW part # 36237694420. Fits front & rear wheels on all R1200GS/GS ADV bikes (THROUGH 2012), all R1200S bikes and all F800S/ST & F650GS twins. Also fits the rear wheel on all R1200RT, R1200R, R1200ST and all K1200/1300S/R and K1200/1300GT bikes. BMW has superceded this part # and the currrent # is 36238521797 . This part requires that the bike be hooked up to the BMW diagnostic computer in order for the vehicle to recognize it. New retail cost is $127, save big here!