Example on an operational car
WARNING: This page is about a different car, the 2008 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.
Figure 7: CIM, ECM and the keys all have the same master key code, illustrated here in green. The different individual key codes are illustrated in red, light green and yellow.
Courtesy of SAAB-SCANIA OF AMERICA, INC.