Dorman 974-051 Tire Pressure Monitor Sensor / Transmitter Measures and transmits tire pressure data wirelessly to the vehicle's ECU, alerting the driver to under or over inflation Proper tire inflation results in improved fuel economy, reduction in premature tire wear, the reduction of injuries and fatalities due to tire failure Two piece sensor design valve stem can be serviced separately providing an 80 per cent savings versus replacing the entire sensor The adjustable stem angle is designed to flex 5 to 26 degrees, which allows fitment to aftermarket rims Easy installation Measures and transmits tire pressure data wirelessly to the vehicle's ECU, alerting the driver to under or over inflation Proper tire inflation results in improved fuel economy, reduction in premature tire wear, the reduction of injuries and fatalities due to tire failure Two piece sensor design valve stem can be serviced separately providing an 80 per cent savings versus replacing the entire sensor The adjustable stem angle is designed to flex 5 to 26 degrees, which allows fitment to aftermarket rims Easy installation