Mazda 323 reset immobilizer

SOURCE: 2004 mazda rx8 immobilizer system

Only after market systems have valet over ride switches.
From what you said, the RX8 is shut down from
the factory immobilizer,
The IM05 bypass module is designed to circumvent this
but it's dependent on you having the original
programmed ignition key to do it.

Also, the system must not be damaged, or the code
lost from the keys or it won't do that.

Mazda may also need to reprogram the immobilizer code
for you to procede. Have that bit of info looked at
first.

SOURCE: Lost my main set for

The spare key is the valet key, You can call the dealer and have them cut you new keys for you car. You will need the VIN number and your registration for the car. If it doesn't have chip in it, they can make it for you in a couple of minutes. If it has the chip in it, they will have to order it. Without the chip, the key will cost between $20 and $30 dollars.