Where is the Tire Pressure Monitoring Sensor Installed?

[SanJasmine]

Tire pressure monitoring sensors are installed either inside the tire or on the exterior of the valve stem. The tire pressure monitor is a simple tire pressure monitoring system that utilizes the sensing function of ABS to compare the number of rotations of the tires. A tire with insufficient pressure will have a shorter circumference, and if one of the four tires has insufficient pressure, its rotation count will differ from the others while driving. The tire pressure monitoring system automatically monitors various tire conditions in real-time by recording tire rotation speeds or through electronic sensors installed in the tires, providing effective safety assurance for driving. Tire pressure monitoring systems are categorized into: 1. Built-in sensors, which are more stable and provide more accurate temperature monitoring data; 2. External sensors, which are relatively cheaper and easier to install.

[MirandaAnn]

Last time my tire pressure warning kept giving false alarms, and I later learned the sensor is actually mounted on the wheel hub. To be specific, in most vehicles, the tire pressure sensors are screwed onto the valve stem position, hidden inside the tire and installed flush against the inner side of the wheel rim. When the technician handled it, he had to first remove the tire to install the sensor, and then redo the wheel balancing—otherwise, the wheel would vibrate at high speeds. These sensors rotate tens of thousands of times daily with the tire, powered by a small internal battery to transmit signals, so their positioning is crucial. If installed crookedly, the readings become inaccurate. The battery in my car's sensor lasted five years before dying, and replacing the sensor cost me 800 yuan. But now, if there's any abnormality in tire pressure, my phone app alerts me immediately, making highway driving much more reassuring.

[MacFinley]

The most common location for tire pressure monitoring sensors is at the tire valve stem, directly mounted on the inner side of the wheel rim. They are typically built inside the tire, resembling a button-sized device fixed against the rim. This design allows for accurate tire pressure measurement, transmitting data to the dashboard via wireless signals. During installation, the tire must be removed to fit the sensor into the valve hole of the rim, then the tire is reassembled and inflated. However, note that a dynamic balance test is mandatory after installation; otherwise, the steering wheel may vibrate. The sensor battery lasts five to ten years, after which the entire unit must be replaced. Some external sensors screw directly onto the valve stem but are prone to theft, making them rare in newer car models.

[DeZoey]

The tire pressure sensor is actually hidden inside the tire, firmly fixed near the wheel rim. Why so concealed? Mainly to prevent damage from impacts. The optimal position is near the valve stem, allowing direct contact with the tire's air for pressure measurement without affecting tire rotation. It works every minute while driving, instantly alerting if pressure deviations are detected. Once on the highway, it was this warning that helped me avoid a blowout. The installation position is crucial—even a slight misalignment of a few millimeters can cause inaccurate readings. When washing your car, avoid directing high-pressure water jets at the wheel rim to prevent interference with the sensor signals.