Tyre Pressure Indicator didn't go off and tyre damaged

[tryingavw]

Exactly rotelman, however most gadgets in new cars these days are marketed as 'driver assistance' devices, not as a safety device, this is to cover the manufacturers in the event the device fails and someone complains that "ESP failed and I crashed in the wet as a result" - the driver still needs to drive to the conditions. In the same way there is still

BMW manuals have a classic comment alongside the ABS ESP etc: "note that the laws of physics still apply...."

[vanDub]

Coming in late but I had my TPMS set some time previously and did a 5 wheel rotation which put the spare on the road. My spare was some 10PSI higher than the tyre it replaced.

With no leaks etc it took the system about 3 days and 30-40 Km of driving before it recognised that the original spare was not the same pressure as the one it replaced and trigger a warning. I know that this case is one of higher pressure but I believe it's the same for lower pressures. The system needs a fair amount of driving to establish that a wheel/tyre has changed from when the TPMS was last set.

Remember that tyre diameter changes with pressure variations (and the resulting rotational speed changes that the system monitors) are very small indeed.