One problem related to tire valve has been reported for the 2006 Chrysler Town & Country. The most recently reported issues are listed below.
Discovered that valve stem had broken off. Valve stem is attached to tpms sensor and replacement valve stems are not offered. The breaking of the valve stems seems a common occurrence. Very disconcerting. This happened while driving, even though I did not notice until later and luckily, the tire did not deflate rapidly.