Why We Check All Four Tyre Pressures After a Puncture Repair

August 16, 2026

Why We Check All Four Tyre Pressures After a Puncture Repair

A proper puncture repair starts with inspection, not with a plug. For a suitable tread-area puncture, an internal mushroom plug-patch is the preferred professional method because it seals the injury channel and reinforces the inner liner from inside the tyre. When the puncture is in the repairable tread area, the casing is undamaged and the repair is completed correctly, the tyre can normally stay in service until the tyre reaches the end of its normal usable life.

The important limit is location. Punctures close to the shoulder or sidewall are not suitable for repair under Australian tyre repair practice and tyre manufacturer guidance. The sidewall flexes heavily, carries structural load and cannot be safely reinforced by a standard tread-area repair. If a nail or screw is too close to the sidewall, the correct recommendation is tyre replacement.

For TPMS-equipped wheels, the sensor position needs to be identified before bead breaking or tyre removal. Careless lever placement around the valve can damage a sensor, so a TPMS puncture repair needs slower, more careful handling.

After repairing the punctured tyre, we check and set the pressure on the repaired tyre and the other three tyres. Many drivers do not check tyre pressures regularly, and cars that sit at home for long periods can lose pressure naturally over time. If the other tyres are already low, the customer may drive away and see the tyre pressure warning light even though the repaired tyre is sealed.

Checking all four tyres before handover reduces confusion, improves safety and gives the customer a cleaner explanation: the puncture was repaired, the repaired wheel was leak-tested, and all remaining tyre pressures were checked against the vehicle placard or a suitable operating pressure.

Common Reasons the Other Tyres Are Low

The car has been parked for weeks or months.
Pressures have not been checked since the last service.
Adelaide temperature changes have shifted cold pressure.
The tyre pressure placard has been ignored.
The vehicle has been carrying extra load.
Another wheel, valve or bead seat has a slow leak.

Quick FAQ

Is a mushroom plug-patch better than an outside plug?

Yes. An internal mushroom plug-patch is the stronger professional method because it seals through the puncture path and repairs the inner liner from inside the tyre.

Can a tyre be repaired if the nail is near the sidewall?

Usually no. If the damage is in the shoulder or sidewall area, the tyre should be replaced.

Why did my TPMS warning stay on after a puncture repair?

The warning may need a reset or drive cycle, or another tyre may already be underinflated. That is why all four pressures should be checked before handover.