confusion re. 05 boxster and ims

[kriss]

I have been looking at an 05 with 41 k,one owner,well maintained. it has a build date of 5/31/05. I inquired of flat6 innovations re. ims issues and got a reply that there were 2 styles of bearings,the later kind cannot be replaced. does that mean later 05(what defines later?)models don't have ims issues? if they do and one goes what happens next? thanks.