TPM light came on went to reputable garage, pressures seemed ok, light did not go out but I assumed it would take a short while to reset.

Three miles later I get a flat tyre, took wheel to tyre specialist who said tyre was fine , failure was TPM valve. took to deslership ( Car is 9 mths old with 3800 miles only).

Point bank refusal to consider warranty claim!!!!!!!!!

Service manager said failure was caused by me using too "rigid" an inflator when checking tyre thus exerting uneven pressure on the valve stem and breaking it. I have been checking tyres for 50 years without any issues. Apparently the valve stems on these are metal rather than rubber so no 'give' when using inflator. Was never warned of any of this when vehicle was new. Dealer suggested only safe way to have tyre pressures checked to avoid this risk is to take it back to them. How imprcatical is this.

Bottom line is they want £112.81 for a new valve and £72 to reset warning light