Did a search, didn't find, so here I go.

I was filling up the tires on my 8 at a local gas station and I accidentally busted the valve stem with the Air pressure hose fitting. The question is; are the valve stems replaceable on the TPMS? My guess is no, but I wanted to be sure.

 

You have to replace the whole TPMS, because the sensors are actually in the valve stems.

Discount Tire will replace your TPMS for around $53-$98, go to your local store for exact price.