Mazda 3 2004 Owner's Manual page 123

Opening/closing
Security System
Security System
Mazda cannot guarantee the
immobilizer and the theft-deterrent
system's operation if the system has
been modified or if any add-on
equipment has been installed.
4-30
Warnings and Cautions
for Using the Security
System
CAUTION
To avoid damage to the vehicle, do not
modify the system or install any add-on
equipment to the immobilizer and the
theft-deterrent systems or the vehicle.