There was a safety recall on these (certainly in the UK) due to the inertia reels not retracting the belt properly.
This was taken from the UK Vosa Recall website
http://www.vosa.gov.uk/vosa/apps/recalls/default.asp
Make: SAAB
Model: 9-3
Build Start Date: 01/10/2003
Build End Date: 01/10/2004
Concern: SEAT BELT MAY NOT RETRACT
Description: The front seat belt retractors may malfunction, with the effect that the spooled out portion of the webbing will not retract.
Remedial Action: Recalled vehicles will have the front seat belts replaced.
Vehicle Id: 00000000031000001 to 00000000041019218
The same was true in the US IIRC - I'd check with your dealer to see if yours had the recall done. If not they should do it FOC.