What is a TPMS (tyre-pressure monitoring system)?
TPMS (tyre-pressure monitoring system) is a system that detects when your tyre pressures are lower or higher than they should be. If the wrong pressure is detected, it'll warn the driver to check the pressures and correct if necessary. Most TPMS setups look at tiny differences in your individual wheel speeds to detect when one wheel falls out of line with the rest.
Related glossary terms
ABS - Anti-Lock Braking SystemABS (anti-lock braking system) is a system that feathers the brakes when you press the pedal hard.ESC - Electronic Stability ControlElectronic stability control (ESC) is a system that senses the movement of the car and can detect a loss of grip, especially while corneringTCS - Traction Control SystemTCS (traction control system) is a system that detects when your wheels are spinning, either because too much power has been used, or because not enough grip is available on the road surface.