This is the third time the valve stems have broken and caused a flat tire. Its not because they are old its because they are plastic and garbage. I spoke to the tech at a Goodyear Tire place and he said its a known problem and VW/Chrysler has done nothing to fix the issue. It has something to do with the tire pressure sensor or something. Every time it has happened, my wife has been traveling somewhere with my young daughter in the vehicle and I'm pissed to say the least.