[JFP in PA]

What Mike and Wayne are referring to is the last revision of the M96/97, which began in late 2005; so any later model car, or and earlier one with an engine replacement after 1/2006 has the large diameter IMS, which can only be changed by total disassembly of the engine; and are still failure prone. In 2009, Porsche dropped the M96/97 design and switched to the 9A1, which does not have an intermediate shaft, but appears to have some new problems associated with the timing chains. Only time will tell if it is as bad as the IMS.