Professional internal tyre puncture repair for a suitable tread-area puncture on a wheel without TPMS. Internal inspection of tyre condition and repairability. Mushroom plug-patch repair where the puncture is safely repairable. Leak test and tyre pressure set after repair. Other three tyre pressures checked before handover. Sidewall, shoulder, run-flat or casing-damaged tyres cannot be safely repaired and may require replacement.