Monitors tire air pressure and wirelessly transmits data to the vehicle's computer. Triggers a dashboard warning light when tire pressure drops 25% below the recommended pressure.
$50 – $150 per sensor
Total Cost
5 – 10 years (battery life limited)
Replace Interval
Professional Only
DIY Difficulty
Schedule Soon
If It Fails
TPMS sensors monitor tire pressure and alert you when a tire is significantly under-inflated. Required by law on all vehicles since 2008, these battery-powered sensors are mounted inside each tire.
Parts Cost
$30 – $100 per sensor
Labor Cost
$20 – $50 per sensor (usually done during tire service)
Replace when the sensor battery dies (flashing TPMS light), when corroded, or conveniently when getting new tires.
Some models use indirect TPMS (no sensors — uses wheel speed data). These don't need sensor replacement but do need recalibration after tire service.