Tire Pressure Monitoring System (TPMS)
We are seeing more and more vehicles come to us with Tire Pressure Monitoring (TPM) systems. These systems have special valve stems and a device at each wheel that receives a signal from the valve stem to let the driver know of any air pressure problems in any of the four wheels.
These monitors can be expensive and touchy to replace. A tire technician needs to be aware of the presence of this monitoring device prior to dismounting a tire from a wheel. After the tire is placed back on the vehicle, the TPM system frequently must be reset to let the car "learn" about the new wheel and tire.