Called into the dealership to inquire about replacing a leaking valve stem which has a Tire Pressure Monitor Sensor (TPMS). The service guy automatically quoted a full replacement of the unit at over $250 not including labor. Mind you this is a tire valve stem. I proceeded to advise that the sensor is working correctly and doesn't need to be replaced. The techs response that followed tried to make me seem stupid "the valve stem is attached the the sensor." I then advised that there is a valve stem replacement kit with a nut... read full review »