Since it has also been verifiably documented that some IMS bearings have failed after just 3,000 miles, while others still have lasted for 200,000 miles or more, the only safe conclusion that can be drawn is that all M96 and some M97 engines in Porsche 911’s (996 or 997), and all Boxsters (986/987) from 1997 through 2008, are at risk of suffering IMS bearing failure at any time, irrespective of mileage. Years are sort of irrelevant here. Models are. All have their share of issues, some models more serious than others. Most of the times, issues, even serious ones, can be mitigated by proactive replacement/ upgrading of parts, such as the IMS beari...
The statistics suggest that the versions used for model years 2000 to 2005 are most susceptible to failure in the 996 version of the Porsche 911 and the Boxster 986. The chances of IMS bearing failure on a Boxster 987 or Cayman manufactured after a stronger bearing was introduced in late 2005, are actually very low.
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