Sorry, this article is currently incomplete. We'll have this finished up soon. In the meantime, check out some other articles on Cars Simplified!A tire pressure sensor sits inside a tire, typically attached to the valve stem or a band around the rim.
What's Inside a Tire Pressure Sensor
The inside of a tire pressure sensor contains the sensor component itself, a battery (a CR2032 watch battery in this example), and a chip to process the data and send it to the TPMS.