This tire pressure sensor is made by the original manufacturer to Porsche, huf. It is a good idea to change the valve stem out when changing the sensor. The valve stem is part # 993343018001 huf and major organizations including the tire industry association, recommend the tpms sensor and valve be replaced for: fitting new tires puncture repairs changing rims electronic failure damage during tire service damage by road hazards valve core or nut seizure did you know that the transportation recall enhancement, accountability and documentation) act in the u.s. Requires that 100% of all passenger cars, light trucks, and buses manufactured in the united states after september 2007 be equipped with a tire pressure mo...(choose a part on the right to read more)