Tire pressure monitor sensor failures in three 2008 & 2009 Dodge Grand Caravan. The valve stem on the TPMS snaps off at the threaded portion, causing a rapid deflation of the tire. This occurs when driving on snowy or slushy roads, or when attempting to remove the valve stem cover. This has occurred on three fleet vehicles over the last two months. All three vehicles required purchase of new oem TPMS and reprogramming of the new TPMS by the dealer. Two vehicles required towing due to unsafe location at time of failure. One vehicle also required replacement of brand new tire that was destroyed at time of rapid deflation.

- Sardinia, NY, USA

I am a mechanic of 25 years experience and feel the need to report a possible defect that exists on 2008 Dodge Caravan. During the last five months I have replaced three tire pressure monitor system pressure sensors. What make this problem alarming is that all three failed in the same manor. The failure occurs when the portion of the sensor called the valve stem fractures and detaches from the rest of the sensor causing a sudden loss of air pressure in the tire. I have photographs and have saved two of the sensors that have failed. I believe the problem is either a corrosion issue or a weak material used in the manufacture of the product causing it to fracture easily in ice and snow.

- Litchfield, ME, USA