Mazda 6 Radio Reset Code

Posted by Steve
The battery in my wife's 2004 Mazda 6 died and had to be replaced. As a result, the radio insisted that we enter the security code before it could be used again. Problem: we didn't have the code. After a few guesses (0000, 1234, etc) it locked us out. I visited the dealership and was told that they would have to hook up some dedicated equipment and call Mazda to get it re-activated, and that it would cost about £50. This sounded like bullshit to me, so I went away and spent a while searching the various Mazda forums. Eventually I found this thread over at Mazdaforum.com. In case the forum post disappears, here are the steps with a couple of additional steps from forum member Steve G6:

1) After you see ERR on the screen, turn the ignition off and back to ACC
2) Press each of these buttons one at a time: preset 6, AM, Auto M, Seek ^ (up).
3) Input this number: 4989.
4) Press and hold Auto M and Preset 6 together.
5) The word 'GOOD' will appear on the screen indicated that the radio will work.
6) Turn the ignition off and then back to ACC
7) Reprogram new antitheft code into radio as per instruction manual.

Easy when you know how!