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Update Mazda Connect to v74

The region code and current OS version on the car determine which files are safe to use. Open the version screen before downloading.

Find your version

Section titled “Find your version”
Continue only if the region shows NA N.

For EU N, 4A N, or JP M, use the regional service sources.

55.00.650 or newer

One-file updateAlso covers 59.x, 70.x, and earlier 74.x.

Download v74
74.00.324A

Already currentNothing to download.

Above 29.00.000 through 55.00.600

Three-file updateInstall two v70 files, then v74.

Open this path
29.00.000 or older

Dealer serviceMazda uses a separate procedure.

What to ask for

The button downloads cmu150_NA_74.00.324A_update.up directly from Mazda. The file is about 1 GB. Miatafy does not host or modify it.

Verify the one-file download

Exact size: 1,003,179,676 bytes

SHA-256: ffd04e2c8cfaf77388aacde0f9c1cddc17cb6b7f02d7caa2fe6ad39c0f40e787

On macOS or Linux, run shasum -a 256 cmu150_NA_74.00.324A_update.up. On Windows PowerShell, run Get-FileHash .\cmu150_NA_74.00.324A_update.up -Algorithm SHA256.

The result must match the value above. If it does not, delete the file and download it again.

If the screen shows 74.00.331, leave it alone until a matching package and recovery path are confirmed. See the v74.00.331 notes.

Versions through 55.00.600 need three files

Section titled “Versions through 55.00.600 need three files”

Only use this path when your North American unit is above 29.00.000 through 55.00.600. The files must be installed in this order.

1. Fail-safe stagecmu150_NA_70.00.100A_failsafe.up · 7 MB
Download file 1
2. Reinstall stagecmu150_NA_70.00.100A_reinstall.up · about 926 MB
Download file 2
3. Final v74 updatecmu150_NA_74.00.324A_update.up · about 1 GB
Download file 3
Verify all three staged-update files

File 1: 7,088,769 bytes
ef9964509d81d47c1fcae35748096fe7021a9ea15b670acf5675a48679ddbccf

File 2: 925,592,239 bytes
5938019df7e333447c7bf60aa8f6a7e7f9cd50d6eeb7b6e33605800b85bd4ad0

File 3: 1,003,179,676 bytes
ffd04e2c8cfaf77388aacde0f9c1cddc17cb6b7f02d7caa2fe6ad39c0f40e787

Mazda is the distributor for all three links. Mazda’s server publishes the final package’s SHA-256 as object metadata; Miatafy also downloaded and independently hashed every file on August 17, 2026.

Continue with a clean FAT32 USB drive

Section titled “Continue with a clean FAT32 USB drive”
  • Keep every .up file exactly as downloaded. Do not unzip or rename it.
  • For a direct update, put only the v74 file on the drive.
  • For a staged update, start with both v70 files. After they finish, erase the drive and copy only the v74 file.
  • Remove the navigation SD card and every other USB device from the car.
  • Run the engine or use a battery maintainer for the entire update.
Continue to the USB procedure Drive preparation, update menus, and the final version check

If an update has already failed, use firmware recovery instead of starting another attempt.

Not in North America?

Do not use the files above. No anonymous Mazda-hosted Gen 6 download has been verified for EU N, 4A N, or JP M as of August 17, 2026.

A similar version number or filename does not make a package safe for another region. See firmware region codes for details.

Why do older cars need three files?

Firmware is a complete system image. North American units on 55.00.650 or newer can install v74 directly. Earlier supported units use the two-file 70.00.100A stage because Mazda's older package format separated the fail-safe and reinstall steps.

The region code must match on either path. How firmware updates work explains the package format and staged update.

Dealer service is safer for 29.00.000 and older

Section titled “Dealer service is safer for 29.00.000 and older”

An authorized Mazda dealer has the separate service procedure for these early units. Ask for the CMU firmware specifically because service desks can confuse it with maps or Gracenote.

Ask for the request in these words:

I need the Mazda Connect CMU infotainment firmware checked and updated to the region-correct Gen 6 v74.00.324 build. This is the infotainment operating-system firmware, not a navigation map SD card and not a Gracenote media-database update. Please record the complete final OS and region label on the repair order.

What to bring:

  • VIN.
  • Your current OS version, failsafe version, and region code from the diagnostic menu, plus a photo of the version screen.
  • A real symptom if you have one: rebooting, Bluetooth dropouts, CarPlay failures, camera glitches. Some service departments only flash the CMU against a logged complaint or TSB.
  • Note where your navigation SD card lives; it should come out before the flash.

If the first dealer cannot help, ask for someone who handles Mazda Connect or CarPlay retrofit work. The dealer visit guide has the appointment checklist.

After the update

Section titled “After the update”
  1. Let the CMU reboot fully, then power-cycle it once normally.
  2. Open the version screen again. Confirm it shows 74.00.324A and the region is still NA N.
  3. Test the core systems: Bluetooth, backup camera, navigation, and CarPlay/Android Auto if equipped.
  4. Photograph the new version screen for your records.

324A is also the version Miatafy’s ScreenTune products target.

Firmware references

Section titled “Firmware references”