SINCE I HAVE HAD THE VEHICLE I HAVE HAD TO REPLACE THE DRIVE SHAFT 3 TIMES. PORSCHE REPLACED IT ONCE UNDER WARRANTY AND THE OTHER TWO TIMES I HAD TO PAY IN EXCESS OF $900.00 TO HAVE IT REPLACED. I HAVE BEEN TOLD BY PORSCHE THAT IT HAS A DEFIECTIVE RUBBER SEAL AND WHEN THE SEAL FAILS SO DOES HE DRIVE SHAFT. THIS IS A COMMON DEFECT AND IS KNOW BY PORSCHE AT THE DEALERS AND THE MANUFACTURER. THEY HAVE ACKNOWLEDGED THE DEFECT TO ME. MY CONCERN IS IF THE DRIVE SHAFT TOTALLY FAILS AND BREAKS, NOT JUST FLEXING AND HITTING THE FLOOR, IT COULD CAUSE AN ACCIDENT BY MAKING THE VEHICLE GO OUT OF CONTROL. *TR