WASHINGTON, D.C. (October 23, 2023) —A new study by AAA found that in-vehicle tire pressure monitoring systems (TPMS) are generally accurate, but drivers should still check their tire pressure manually. Why keep tabs on your tires? They are the only part of your car in contact with the road, and proper inflation is the key to safety and better gas mileage.

“Whether in rain, sleet, snow, or dry conditions, tires are the unsung heroes of your car,” said Greg Brannon, AAA’s director of automotive engineering. “They are designed to work best when properly inflated. Our research found that the pressure monitoring systems that provide data for instrument displays or trigger the amber dashboard warning worked as intended. But we recommend always having a dependable old-school manual pressure gauge to check them once a month because a tire can be more than 20% deflated before it triggers the dashboard warning.”