The 99-02 9-5's, 99-02 Viggens, and 2000-2002 9-3's were the sludger years. The PCV was finally revised on the 03 9-5 (and further still in 04) and the 9-3's went to the new body style w/ Ecotec engines in 03.
Since the mods that SAAB made to the later 9-5 couldn't be retrofitted to the earlier cars, SAAB released several update kits for the older systems. The final one, kit #6, has been out for a couple of years and seems to have largely rectified the situation. Otherwise, they are your typical Euro cars. Since GM has been very delinquent in allowing SAAB to replace the 9-5, the same basic car has been in service since MY 1999 and is pretty reliable. As for the 9-3's, there were some new model niggles but it, too, has become a fairly trouble-free car.