Saab 9-3 9-5 Secondary air injection pump check valve.  9-5 V6's have 2 of these, 2003 9-3 sport sedans have 1 of these.

Up for sale is a good functional Saab SAI pump check valve.  This check valve closes after the SAI pump runs, and prevents exhaust gas and condensation from being allowed into the pump motor.  If defective, these tend to allow water condensate and exhaust gas into your SAI pump, which causes failure of the pump in short order.  These pumps are not cheap, and neither are these valves to buy new.

This unit must be in good working condition or you will get a check engine light.  This good used unit was removed from a crash damaged car, with a good clean SAI pump - should work just fine.  I will warranty this for 60 days after purchase.  This is a genuine Saab part.