Porsche discloses frequency of IMSB failures.

[Mark_T]

I always wanted to be a 1%-er so looks like I got my wish. This is good info. There is absolutely no way I am going to touch the IMSB until I go in there anyway to do the clutch and, depending on what I find, I may not even do it then.

[Perfectlap]

Actually that number -- 4 to 8% --, estimated by the plaintiffs' lawyers via Porsche documents and not an estimate directly form Porsche NA, is just for the compromised failures that Porsche made somewhat good on.

It doesn't include the compromised IMSB's that Porsche did nothing about, presumably out of warranty cars that they offered no charity to. And if you consider that an undetermined number of those single row bearing cars sold were low mileage cars during the warranty period, then it stands to reason that the IMS failures will exceed that 4-8% figure once those former garage queens/low milers start taking on daily driving duties under 2nd, 3rd owners.

The real trick is to determine how many single row bearing cars have not had their IMSB's upgraded even after having the clutch replaced. Remember, the LNE bearing is a fairly new preventative option (probably still in the single digit % of all single row cars out there) and the revised M97 bearing that went into some m96 engines...who knows what's up with those, Porsche isn't talking.

[Nimbus117]

I read this a few days ago. The way it's laid out with the VIN's listed made me think the first percentage referred to the 986 and the second to the 996.

No idea if this is correct, just a possible interpretation of legal twaddle.