Last winter my TPMS warning showed low. Aired up the low tire, would go down again over about 24-36 hours. Soapy water revealed a length wise split in the valve stem part of the TPMS. Harsh winters here, looks like water got inside the stem and froze, thus the split.
Seems like a bad design to me as the stem looks/feels like it's painted plastic. The first time, I figured it was a fluke. The dealer replaced it and all was fine the rest of the winter.
Well, we went to put on my winter tires Saturday and one of the tires is flat. We marked them when we took them off in the spring and I'm pretty sure this is the same wheel. Soapy water again reveals the exact same issue. TPMS stem has split. No way now to tell if it was cracked and leaking slow enough that we didn't notice it when we took them off, or if they froze up sitting in the barn in late spring. Regardless, it shouldn't happen.
Anyone else had this problem?