Mazda 6 2007 Owner's Manual page 115

NOTE
Since the electronic codes are reset
when repairing the immobilizer
system, the keys are needed. Bring
all the existing keys to an Authorized
Mazda Dealer.
Maintenance
If you have a problem with the
immobilizer system or the key, consult an
Authorized Mazda Dealer.
NOTE
The keys carry a unique electronic
code. For this reason, and to assure
your safety, obtaining replacement
key requires some waiting time.
They are only available through an
Authorized Mazda Dealer.
Always keep a spare key, in case one
is lost. If a key is lost, contact an
Authorized Mazda Dealer as soon as
possible.
If you lose a key, an Authorized
Mazda Dealer will reset the
electronic codes of your remaining
keys and immobilizer system. Bring
all the remaining keys to an
Authorized Mazda Dealer to reset.
Starting the vehicle with a key that
has not been reset is not possible.
Security System
Modification and Add-On
Equipment
Mazda cannot guarantee the immobilizer
system's operation if the system has been
modified or if any add-on equipment has
been installed to it.
CAUTION
To avoid damage to your vehicle, do
not modify the system or install any
add-on equipment to the immobilizer
system or the vehicle.
Knowing Your Mazda
3-37