They fit perfectly on my 2007 Porsche Cayman S. No programming required, just install and go, and they sync to the car automatically. (On the car dashboard you need to go to the main menu, select TPMS, select the tire size again and press enter to start the learning process). Significantly cheaper than OEM sensors. However, tire fitters don't seem to know anything about these sensors. I went to a big box of car tires and they told me the sensors were dead. Well of course they are inactive and I think they are pressure activated - install them first. Second place got the job done, but they didn't seem to know how to mount it. The problem is that there are so many different TPMS systems on the market right now that stores just can't keep up with the knowledge. But they did their job, the sensors were installed and within 1 mile of driving the car they are all in sync and working great! No more TPMS lights and dashboard errors!
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