The recent news about the recalls on certain Cayennes really was jumping the gun. Porsche Cars North America has not yet issued any recalls on the Cayenne that relate to the recent news stories. A good source on recall information can be found at http://www.nhtsa.org That site can give you information on recalls for other makes and models as well as a wealth of other informatioin. You may also want to look at Porsche Cars North America's web site http://www2.us.porsche.com/english/usa/home.htm
Another idea is to stop by your local dealer and talk with some one in the service department, either an advisor or service manager if they have the time available they may have additional information or ideas for you.
I hope this helps and good luck on project.
David