No. 3 PCM, and Key Replacement Procedure (Clearing Previously Programmed Key ID Numbers, Key Re-program): Condition

WARNING: This page is about a different car, the 2007 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Have two or more keys to be programmed after the key ID number clearing.

CAUTION:

Before starting Step 1, complete the procedure for PCM replacement.