TPMS (Tire Pressure Monitoring System) sensors are devices that are designed to monitor the air pressure in a vehicle's tires and alert the driver if the pressure drops below a certain level. These sensors are typically located inside the tires, and they work by transmitting data wirelessly to a receiver inside the vehicle.TPMS sensors are typically located in the valve stem of the tire, which is the small metal or plastic protrusion that sticks out of the tire. The valve stem is the part of the tire that is used to inflate and deflate the tire. The sensor is typically a small electronic device that is inserted into the valve stem and secured in place with a small metal or plastic cap.The sensor contains a battery and a pressure transducer, which measures the air pressure in the tire. The sensor also contains a radio transmitter that sends data wirelessly to a receiver inside the vehicle. The receiver is typically located near the driver's seat, and it displays the pressure readings for all four tires on the dashboard.When the tire pressure drops below a certain level, the sensor sends a signal to the receiver inside the vehicle, which then triggers an alert to the driver. The alert can take the form of a warning light on the dashboard, a chime, or a message on the driver information display.It's important to note that not all vehicles come equipped with TPMS sensors, some vehicles may have direct or indirect system. Direct TPMS sensors are located inside the tire and communicate directly with the vehicle's onboard computer, while Indirect TPMS sensors are located inside the wheel hub and use the vehicle's ABS (Anti-lock Braking System) to measure the tire pressure.In conclusion, TPMS sensors are electronic devices that are designed to monitor the air pressure in a vehicle's tires and alert the driver if the pressure drops below a certain level. These sensors are typically located inside the valve stem of the tire and communicate wirelessly with a receiver inside the vehicle. It's important to note that not all vehicles come equipped with TPMS sensors, and it's important to check the vehicle manual to know the type of system that is installed on the vehicle. It is also important to regularly check the tire pressure and to replace the sensors if they fail.