Did all Boxsters have cylinder liners?

[2001saxster]

I won't bore everyone with the details since its already in another thread (engine failure, help what do I do?), but my 2001 Boxster S engine just bit the dust. I have read about all the problems with the slipped liners on cars with 98 and 99 build dates. Were these the only ones to have liners or did they all have them and this was just the range that had the most problems? Also, how can I determine the build date of my car. It is a model year 2001, but was already on the road in Sept of 2000. I would think that could make it very likely to have gotten one of the poorly sleeved engines from that run.