Mazda Connect Firmware update stuck at 19–21% and frozen radio

[StePago]

Hello everyone,
I’m reaching out because I’m having major issues updating the Mazda Connect system on my Mazda 3 (2015, EU model).

My current firmware version is 56.00.513 EU N. I’ve read that in order to reach the latest 74.00.324A EU N version, it’s recommended to first update to 70.00.100A EU N.
So, I downloaded 70.00.100A, placed it on a USB stick together with the failsafe file, and followed the instructions (failsafe first, then reinstall package with codes 3 and 2).

The problem:
The update always gets stuck between 19% and 21%, then the system restarts and shows an "unsuccessful update" message. I’ve already tried:

- Removing and reinserting the ROOM fuse multiple times.

- Restarting with the BACK + NAV + VOLUME combination.

- Using a FAT32-formatted USB stick (32 GB).

- Repeating the whole procedure from scratch.


At the moment, the radio is completely frozen.
After attempting the update, the Check Engine light also appeared (it wasn’t there before), although I was told it’s unrelated to the CMU update.

Some clarifications:

- I have NOT installed any CarPlay/Android Auto hardware module.

- I do not have firmware 59.00.546 (not sure if it’s required as an intermediate step).

- I’m unsure if I should try updating directly to 74.00.324A or if that’s risky.

- I don’t know if downgrading to an older version (e.g., 31.00.xxx) is possible.


I’d really appreciate if anyone who has experienced a similar issue could guide me through the correct procedure, or possibly share the correct firmware files for the update.
Any suggestions are very welcome, as I’m currently stuck.

Thanks a lot in advance for your help!

 

[TheMAN]

if it's stuck and now unresponsive, the CMU is bricked... there's ways to take it apart to fix it, but it's highly technical

the best thing to do is to get a used CMU from a car with the same specs, and put it in, the upgrade with a RELIABLE USB drive, no more than 16GB in FAT32 only

 

[StePago]

if it's stuck and now unresponsive, the CMU is bricked... there's ways to take it apart to fix it, but it's highly technical

the best thing to do is to get a used CMU from a car with the same specs, and put it in, the upgrade with a RELIABLE USB drive, no more than 16GB in FAT32 only

Can you pleas explain me these technical solutions?

 

[StePago]

Update!

I just solved the inconvenience and the radio works with the update 70.00.100A.

 

[ceekay27]

Update!

I just solved the inconvenience and the radio works with the update 70.00.100A.

Hi, Ive just had someone out to update my firmware, and install new hub for AA. However during the firmware update, it's stuck at 2% and gives the fail message, how did you get yours working again?

 

[StePago]

Hi, Ive just had someone out to update my firmware, and install new hub for AA. However during the firmware update, it's stuck at 2% and gives the fail message, how did you get yours working again?

Hi there,
I just used an official USB stick (Toshiba). I think that you can use whatever you want, but it needs to be official (Samsung, Toshiba, SanDisk,....) and formatted in FAT32, I think also that the maximum storage of the USB is irrelevant, because mine was 32gb.

Be aware that you have to update the firmware before installing the AA module (the author of another topic told me so).

Hope this can help you.