Published by Rims & Tires
Compiled & checked by the site's publisher from manufacturer, NHTSA & USTMA data · Updated 2026-07-24
The Tire Pressure Monitoring System (TPMS) monitors air pressure in each tire and alerts you with a dashboard light when pressure drops below a safe threshold. Each wheel has a battery-powered sensor inside the tire. When a sensor fails, it needs replacement — not just a reset.
What a TPMS sensor is and why it fails
Each TPMS sensor is a small electronic device mounted on the inside of your wheel, typically attached to the valve stem. It measures tire pressure and transmits readings to your vehicle's computer wirelessly.
TPMS sensors fail primarily because the internal battery dies. The battery is sealed inside the sensor, so the entire unit has to be replaced. Battery life runs 5–10 years depending on usage.
Sensors can also fail from physical damage (bent valve stem from curb impact), corrosion (especially in road-salt regions), or age-related electronic failure.
TPMS sensor replacement cost
Aftermarket sensor: $20–50 per sensor (part only).
OEM sensor: $40–100 per sensor (part only).
Labor: $10–25 per sensor (sensor swap) plus $10–20 per tire for demount/remount if the tire needs to come off.
Programming: $20–40 per vehicle (one-time; the shop relearns all sensors to your car's computer).
Total installed cost per sensor: $50–150. A full set of four: $200–400.
Dealer pricing runs higher: $100–200 per sensor is common at dealerships. Independent tire and auto shops cost significantly less, usually $50–150 installed.
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TPMS reset vs. sensor replacement
A TPMS reset (also called a relearn) is different from a sensor replacement. A reset re-syncs working sensors to the vehicle's computer. It's done after rotating tires, changing wheels, or adding air.
A TPMS reset costs $0–30. It does NOT fix a dead sensor.
If your TPMS light stays on after inflating all tires to correct pressure, one or more sensors have failed. A reset won't fix that. The sensor needs replacement.
Frequently asked
Can I drive with the TPMS light on?
Technically yes, but with reduced safety. The TPMS light exists to warn you before a tire becomes dangerously low. Without it, you can unknowingly drive on a significantly underinflated tire, which raises blowout risk and destroys tread fast. Check pressure manually and get the sensor replaced promptly. FMVSS 138 is the federal standard requiring TPMS on passenger vehicles built after September 2007, so a light that won't clear on a car that age or newer means a real sensor problem, not a glitch.
Do I have to replace the TPMS sensor when I get new tires?
Not automatically. But if your sensors are 5+ years old and the mechanic is already dismounting tires, it's a cost-effective time to replace them. Ask about sensor age and battery status before deciding.
Why does my TPMS light come on in cold weather?
Cold temperatures reduce air pressure, roughly 1 PSI per 10°F drop. Your TPMS system triggers when any tire drops below minimum threshold. Inflate all tires to the door-jamb spec, not the sidewall max, and the light should go off after a few miles. If it stays on, a sensor may have failed.
Can a shop reuse my old TPMS sensors when I get new tires?
Usually yes, as long as the sensors still have battery life and aren't damaged. The shop can test them before mounting the new tires. If a sensor is near the end of its battery life, that's the cheapest moment to swap it, since the tire is already off the wheel.
Why is my TPMS light flashing instead of staying on?
A steady light usually means low pressure. A light that flashes for a minute or so at startup and then stays on generally points to a system fault: a dead sensor, a wiring issue, or a failed relearn. That's a diagnostic job, not just an air-pressure fix, so have a shop read it.
Keep reading
Last updated 2026-07-24. General guidance only — confirm specifics with a local shop for your exact vehicle.