It depended on the engine, but it really seemed to start with the 2000s. it's an issue with the oil pump screen being to fine and clogging up. also, it wasn't every car. just some. Issues were with the B205 or B235 engine. The older MY99 B204 engines didnt have this problem apparently.
There is a good chance that a 2002 that's still running was either free of problems by this point in time, or had it's engine replaced.
here's a list of engine models. i had the second one on the list. Late 1998/Early 1999 MY99.
2.0 L B204 I4, 138 hp ECE (1998-1999)
2.0 L B204 I4, turbo, 185 hp ECE (136 kW) (1998-1999)
2.0 L B205 I4, turbo, 185 hp ECE (136 kW) (2000-2002)
2.0 L B205E (non-US) I4, LPT(light pressure turbo), 150 hp ECE (110 kW) (2000-2002)
2.0 L B205R I4, turbo, 205 hp ECE (151 kW) (1999-2003)
2.3 L B235R I4, turbo, 230 hp ECE (169 kW) (1999-2002)
this is a good starting reference point for these MY.
http://www.saabworkshop.com/index.php?page=home