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When the customer has two or more valid keys from the old steering lock

WARNING: This page is about a different car, the 2005 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Replacing Steering Lock Components
G03701251Courtesy of MAZDA MOTORS CORP.
NOTE:
  • When replacing the steering lock, the coil and keys should be replaced as a set.
  • If no specific time interval is given, each step should be performed within 30 seconds  of the previous step.
  1. Remove the steering lock.
  2. Connect the ignition switch connector and key reminder switch connector to a new steering lock.
  3. Connect the coil connector to the removed steering lock as shown in the figure.
  4. Insert key 1 into the removed steering lock.
  5. Insert key 3 into the new steering lock and hold for 1 second or more. 
  6. Remove and insert key 3 five times  at no more than 1-second intervals. 
    1. After the final key insertion, verify that the security light illuminates.
    2. Remove the key from the steering lock and verify that the security light goes off.
    NOTE:
    • Perform Steps 7,  8 and  9 within 30 seconds after Step  2.
  7. Remove key 1 from the steering lock.
  8. Insert key 2 into the removed steering lock.
  9. Insert key 3 into the new steering lock and turn the key to the ON position. (1) Verify that the security light illuminates.
  10. After verifying that the security light goes off, turn the key to the LOCK position.
    NOTE:
    • Perform Steps 11 and  12 within 30 seconds after Step 10.
  11. Disconnect the coil connector from the removed steering lock and connect to the hew steering lock.
  12. Turn key 3 to the ON position and verify that the security light illuminates.
  13. After verifying that the security light goes off, turn key 3 to the LOCK position and remove from the steering lock.
  14. Insert key 4 into the new steering lock and turn the key to the ON position.
    1. Verify that the security light illuminates.
    2. After verifying that the security light goes off, turn the key to the LOCK position and remove from the steering lock.
  15. Insert key 5 into the new steering lock and turn the key to the ON position.
    1. After verifying that the security light goes off, turn the key to the LOCK position.
  16. Wait for 30 seconds. 
  17. Install the new steering lock to the vehicle.