Purchased to replace OE (Siemens) TPMS sensors fitted to a 2008 Chrysler Town and Country after a rod broke off and the tire lost all air. The OE shafts look like they are cheap cast iron. Schrader is a functionally equivalent replacement. The van's TPMS warning system recognizes new sensors within 10 minutes without a special learning process. Simply place the sensor on the rim and off you go. Also, the Schrader has a rubber coated shaft with metal underneath and looks like it's strong, won't corrode or click like dangerous OE junk. dealer. You can find Siemens TPMS a bit cheaper if you're not buying from a dealer, but then you still have to worry about cheap metal shafts.