FixVault

No.1 Additional Key Programming Procedure (Using Two Valid Keys): Notes

WARNING: This page is about a different car, the 2008 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
  • Do not place the following devices in the vehicle while programming, otherwise programming cannot be performed:
    • Card key
    • M-MDS
    • Personal computer
    • Devices that can send/receive the radio waves