No. 6 Programming Procedure Due To Simultaneous Replacement of Immobilizer System-related Parts (PCM and Keyless Control Module): Notes
WARNING: This page is about a different car, the 2011 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Since two or more keys need to be programmed to start the engine, program two or more keys after the replacement.