[husker boxster]

If these wheels are for your Box, no reason not to buy them. All the TPMS is is a fancy valve stem. Inside the wheel is a little plastic square that slides thru the valve stem hole. It's held in place by a metal retainer that slips on the outside of the tire (keeps it from falling back into the tire). They can be replaced with regular valve stems. The inside plastic section contains the monitoring system and a battery that runs out of juice somewhere around 6 yrs.