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Check Your Mazda Connect Firmware Version

Record the OS version, region, and failsafe version exactly as shown. The OS version and region determine the safe update path.

Settings → System → About is the fastest path

Section titled “Settings → System → About is the fastest path”

Open Settings, scroll to System (top right), select About, and read Version Information. The screen reports three fields:

OS Version:       74.00.324A
Region:           NA N
Failsafe Version: 59.00.504
  • OS Version is the firmware you’re running, the number this site documents against.
  • Region (NA N, EU N, 4A N, JP M) sets which packages are compatible. See firmware region codes.
  • Failsafe Version is the recovery partition the unit can fall back to if an update fails.

Tap the red Settings tile, or scroll to it with the commander knob and press to select. The menu path is identical either way.

Diagnostic code 53 works when the menu does not

Section titled “Diagnostic code 53 works when the menu does not”

Use this when the normal UI is frozen or you want the raw diagnostic readout. With the system powered on (engine running or accessory on):

Hold Volume/Mute + Music + Favorites/Star together for about three to five seconds.

The screen switches to the Diagnostic Test keypad. It is a number pad, not a labeled menu: type 53 and press the commander knob (or tap Enter) to read the CMU software version and region code. Codes the firmware doesn’t recognize show “Invalid.” The combo is physical, so it works the same on touchscreen and commander cars, and Mazda’s own service bulletin documents this entry method.

Two things people trip on:

  • Code 99 is the firmware-update search, not the version readout. It scans a USB stick for an update package. Enter 53 for the version and leave 99 alone unless you’re deliberately mid-update.
  • Nav + Back + Volume/Mute (held about 10 seconds) is the reboot chord, not the version screen. If the display goes black and restarts, you hit that combination instead. It’s harmless and erases nothing, so just try again.

For the full keypad reference (every code and what it does), see hidden menus.

Read the version and region together

Section titled “Read the version and region together”

The first two digits (74) are the major version, the part that matters most, since it decides feature support and which modification path applies. The rest (00.324A) is the minor revision, build, and a revision letter. For what v74.00.324A is and where it sits in the timeline, see the version reference. Your region code (NA N and the like) shows separately on the same screen and must match any firmware package you install. See firmware region codes for the code breakdown.

The major version identifies the feature set

Section titled “The major version identifies the feature set”
Version rangeWhat it means
v55–v59Older Gen 6 firmware. No native CarPlay/Android Auto; many cars on this range never got the retrofit.
v59.00.502+Late v59 builds; behavior diverges from earlier v59 for some modification tooling.
v70+Native CarPlay and Android Auto support added. Most dealer CarPlay retrofits landed cars here.
v74.00.324AThe last widely distributed Gen 6 release. Common late North American service baseline and the reference version this site documents against.
v74.00.331Reported on some newer and replacement Gen 6 CMUs, often wireless-CarPlay-capable. No official standalone package or changelog is publicly documented. See v74.00.331 status.

For the full version history (every build from the early units through v74.00.331, with CarPlay and rollback notes), see firmware versions.

Do not infer firmware from the model year

Section titled “Do not infer firmware from the model year”

Some rules of thumb before you look:

  • Pre-2019 cars that were never updated are often still on v55–v59.
  • 2019+ cars, or any car that went to the dealer for infotainment work, are frequently on v70 or higher.
  • The 2019+ (ND2) MX-5 shipped from the factory on v59.x. Many were later moved to v70+ by dealers during CarPlay retrofit or service visits.

These are tendencies. The version screen is the authoritative source.

Choose the next step from the number on the screen

Section titled “Choose the next step from the number on the screen”

Firmware governs the feature set. CarPlay and Android Auto only exist on v70 and up. Bug fixes and behavior changes ship version to version, so a problem documented on one build may already be resolved on another. And if you’re considering any modification (including ScreenTune, which is built and validated against v74.00.324A), the supported path depends entirely on the version you’re actually running. Confirm the number first; don’t work from the model year.

Choose the matching update path North American downloads and version thresholds

Firmware references

Section titled “Firmware references”