Does the system show blinking "ERR" message on the display?
Mazda says that you must purchase a new system because your old system is now useless.
However, this is not always true.
Most Mazda radios have a hidden unlock feature that can override the anti-theft.
Try this:
Step one:- press one at a time- preset 6, AM, Auto M, Seek ^ (up).
Step Two:-Input this number, 1414.
Step Three:- Press and hold Auto M and Preset 6 together.
Step Four:- The Word 'GOOD' will appear on the screen indicated that the radio will work.
Step Five:- Reprogram new Antitheft code into radio as per instrution manual.
Post here if it does help or not... if it doesn't help, I can give you several other possible solutions (another sequences of pushing buttons).
A.R.S., November 2012
