What Are TPMS Sensors? Understanding Their Role

A TPMS sensor, or Tyre Pressure Monitoring System sensor, is important for maintaining optimal tyre pressure, enhancing vehicle safety and efficiency. These sensors provide real-time information about the air pressure inside each tyre, alerting drivers to any issues before they become significant problems.

How Do TPMS Sensors Work?

TPMS sensors operate by continuously measuring the air pressure inside your tyres. There are two types of systems: direct and indirect. Direct TPMS uses sensors mounted inside the tyre to provide precise pressure readings, while indirect TPMS estimates pressure by monitoring wheel speed and other factors. At Manchester Alloys, we often explain to our customers that direct TPMS is generally more accurate, providing immediate alerts when tyre pressure drops below safe levels.

Why Are TPMS Sensors Important?

Maintaining the correct tyre pressure is important for safety, fuel efficiency, and tyre longevity. Under-inflated tyres can lead to increased wear, higher fuel consumption, and even blowouts. One of our customers, driving a Vauxhall Corsa, experienced a sudden drop in tyre pressure due to a puncture. Thanks to the TPMS alert, they were able to address the issue promptly, avoiding further damage and potential safety hazards.

Common Issues with TPMS Sensors

Occasionally, TPMS sensors can malfunction or give false alerts. This might be due to battery depletion, sensor damage, or interference with the signal. We had a case with a Ford Fiesta owner who reported frequent false alarms. Upon inspection, we discovered the sensors were low on battery, meaning the TPMS warning dropped in and out due to lack of frequency. We changed all 4 sensors on this 2014 Fiesta, and gave a 5 year guarantee on the new sensors!

Maintaining Your TPMS Sensors

Regular maintenance of your TPMS sensors is important to ensure their longevity and accuracy. At Manchester Alloys, we recommend regular sensor checks during tyre rotations or changes. It’s also important to replace the sensors’ batteries every 5-10 years, depending on usage. If you notice persistent TPMS alerts despite correct tyre pressure, it may be time for a sensor replacement.

Can You Drive Without TPMS Sensors?

While it is technically possible to drive without functioning TPMS sensors, it is not advisable. Without them, you won’t receive timely alerts about tyre pressure issues, which can lead to unsafe driving conditions. A Skoda Octavia owner once came to us, unaware of a slow puncture until it was too late, resulting in a costly tyre replacement. TPMS sensors could have prevented this by alerting them to the issue early on.

Reviewed by

Casey Jones

Forged wheel and performance car specialist · 6 years hands-on

First-in-the-world fitments on the new-shape Alfa Romeo Giulia Quadrifoglio, BMW XM, and Citroen Ami. Thousands of wheels and tyres personally sold and physically fitted across performance, luxury, and classic vehicles. Every article on this site is reviewed against real workshop experience.