Mazda 3 radio code reset - 2007 Mazda 3

Try this method

How to Reset Mazda Radio ' Alden Mazda

To unlock the radio in your Mazda Soho, follow these steps:

Press the following buttons in sequence:

Preset 6
AM
Auto M
Seek ^ (up)
Input the number 4989.

Press and hold the Auto M and Preset 6 buttons together.

The word 'GOOD' will appear on the screen, indicating that the radio is ready to work.

Finally, reprogram the new antitheft code into the radio as per the instruction manual. Mazda Radio code reset - Mazda Forum - Mazda Enthusiast Forums

Disconnect the power to it or remove the fuse. Don't forget you will need the security code.

Or try this

How to Reset a Mazda Radio

1. Reset your radio by pressing the music, navigation, and volume buttons at the same time.
2. Press the three buttons simultaneously for at least 20 seconds.
3. The system should then automatically reboot itself and that's all to it!

How to Reset Mazda Radio

The Mazda dealer should be able to help you.

Hi, few options:

1) go to a Mazda Garage.

2) insert 3 times the wrong code and then follow: http://www.mazdaforum.com/forum/general-tech-6/mazda-radio-code-reset-15083/

These are known as theft deterrent codes, so that said they would not publish them on the internet. To get the code you need the radio chassis serial number and the cars VIN number and either see the dealer or go here: www.radiocodes.com

You can get the radio code by calling any mazda dealer, You will need to give the vin # of the car so they can look up the code. They will beable to give it to you for free.

Or read the links below.

http://www.mazdaforum.com/forum/mazda-millenia-19/how-fixing-missing-radio-code-16552/

http://www.mazdaforum.com/forum/general-tech-6/mazda-radio-code-reset-15083/

it turns out that you can install your own code and remove or change it
so i have removed the previous and installed my own

It's a 4 cipher number code that locks and unlocks the radio unit  - it's and antitheft security measure. Each radio has its own number.
By typing it directly on the radio - use the memory keys.

I found this lying around :-)
Hi people,
Im going to hopefuly help alot of people out, but at the same time will upset Mazda dealers.

I have the code to unlock Mazda radios the have 'ERR' due to 3 wrong codes. Do not listen to mazda book that states 3 wrong codes make CD playing Inop req replacement...
121 Metro DW10*2 > 203028, MX5 NB30P2,
Milennia, 323 BJ10*2, 626 GF10S2, and Tribute.
Step one: - press one at a time- preset 6, AM, Auto M, Seek ^ (up).
Step Two:-Input this number, 4989.
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 instruction manual.
Hope this helps some people out, save you some money as so