Where is the tire pressure sensor installed?
3 Answers
Tire pressure sensors can be installed in two ways: internal and external. Internal sensors are installed inside the tire, which is relatively more stable. External sensors are attached to the outside of the valve stem. Internal installation is more complicated, but the sensors last longer, typically 3 to 5 years. External installation is simpler and more convenient, but the sensors have a shorter lifespan, usually 2 to 3 years. Both internal and external tire pressure monitors can accurately measure tire pressure data, but the sensors need to be removed when inflating the tires. The working principle of the tire pressure sensor is that when the car is in motion, the sensors installed in each tire transmit data such as tire pressure and temperature to the central receiver via wireless signals. The receiver then analyzes the data and displays warnings on the alarm display if necessary.
The tire pressure sensor is installed inside each tire, and you can see it near the valve stem. I paid special attention to this when I changed my tires myself. It's about the size of a button battery, stuck to the inner side of the rim, measuring air pressure data through a small hole near the valve stem. When changing tires, be sure to remind the mechanic not to damage it. Last time, my neighbor didn’t pay attention during a tire change, and the sensor got pried off, causing the entire system to give false readings. These things need their batteries replaced every five or six years, but it’s quite a hassle to remove them since you have to take the tire off. It’s recommended to go to a professional shop for this to save trouble. You don’t need to worry about it getting bumped while driving, as it’s safely tucked behind the rim.
After driving for over a decade, I've noticed that tire pressure sensors are generally positioned similarly across different vehicles – hidden on the inner side of the wheel rim near the valve stem. It's essentially a miniature electronic device that wirelessly transmits tire pressure data to the dashboard. Last time I got a tire repair, the mechanic mentioned they're most careful not to accidentally hit the sensor housing during removal/installation. If the tire pressure warning light frequently illuminates in winter, it might be due to poor battery contact caused by freezing temperatures. Those modifying rims should note that overly thick rim covers may interfere with signal reception. I find this design quite ingenious – operating entirely within the tire, unaffected by mud, water, or vibrations.
