If I am not mistaken, our cars (using Tye Pressure Indicator - TPI) do not have a sensor on the wheel to detect punctures. Unlike the Tyre Pressure Monitor - TPM option which has a sensor on the wheel which monitors the exact tyre pressures of the tyre. Ours is more like measuring deltas of the rolling diameter which will indicate a flat. Not so high tech, but easier and less hassle with rim/tyre swaps I guess.