what is it that is different, is it the mhz that changes?, i see 433 mhz on mine, and see on ebay RDK sensors(RDK is the german) from vw/audi with the same 433 mhz and new they are only 100€ for 4...could this be another example of the hike in price for all things porsche...?

 

no one?

 

You're talking electronics here - there could be many differences. You're obsessing over an immaterial amount of money v. the cost of your car - just buy the OEM sensors and move on to something more exciting.

 

not the $, though i work hard for mine and don't like to give it away if i don't have to, and you haven't yet seen me 'obsess'...probably won't either, i'd like to know how these things work

 

Here's some info that's interesting.
http://berutpms.wordpress.com/2012/04/10/tpms-facts/

 

I got mine from suncoast (and ended up not needing them), and resold here for a 100 loss. They cost about 350 for 4
buy them new. They will last you at least 5 years