I own Touareg 2005 and is now 100, 000km.
"tyre pressure monitoring system fault" sign has been shown for about a year.
I had to visit Mississauga VW for numerous times for the same problems but they couldn't find the exact root problems and they only adjust the tyre pressure.
6 months ago, "Flat tyre" sign shown up and I found a needle on the tyre so I had to visit theme again. The adviser and engineer couldn't find the problem and they just charged me for replacing the tyre. 6 months later I visited queensway VW, and they found that there was a crack on the sensor and fixed it and it charged about $500 to replace the sensor.
Because of inability of "mississauga VW", I couldn't fix the problem during my warranty period and I had to pay for this!