Mazda Connect information entertainment system in the Mazda 3 2017 Model

How to soft reset the Mazda Connect infotainment system

If the Mazda CMU freezes or locks up while driving – or if for any reason you need to reset the CMU – you can reset it without turning off the ignition by pressing the following button combination and holding it for 10 seconds:


The infotainment screen will go black then display the Mazda logo as the unit finishes rebooting.

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Michael Visser

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16 thoughts on “How to soft reset the Mazda Connect infotainment system”

  1. But when will Mazda fix it so it does not keep occuring? My Car is a 124 Abarth spider 2017 with a mazda Sat Nav. It should have been sorted by now.

    1. That’s the million dollar question. Are the technicians updating the firmware each service? If it persists get them to replace the CMU and navigation SD card under warranty.

      I got one or two lockups within the first year of having my Mazda 3, since then it’s been running smoothly.

    1. Hallo, wo finde ich die Tastenkombination ZURÜCK + STUMM + NAV? Muss ich am Radio drehen , keine Ahnung? Können Sie uns helfen? Vielen Dank !

      1. Moin moin Marion! The shortcut is not on the screen, it is the physical buttons on your Mazda Connect commander controls in the center console.

        ZURÜCK + STUMM + NAV

        Hold it for 10 seconds. The engine must be running or the car put in accessory mode by double pressing the Start button without pressure on the clutch or brake.

  2. Thanks,
    Just make sure you are pressing the radio volume button down for mute function plus other two. Worked for me.

  3. did not work.
    Working initial conditions when turning the car on the display displays the safety message and then the function icons. Now all I get is the Mazda logo which turns on and off a few times (non-periodic) and then the function icons are displayed for a few moments and then the Mazda loge reappears. This sequence of events repeats in a seemingly random manner.

    1. Hi Danial, you’re stuck in a boot loop. Unfortunately only re-flashing the CMU unit will resolve this so you’re either in the deep-end of the pool doing this yourself via terminal or require a visit to your dealership.

  4. Seemed to work ok, many thanks for the info.
    Hope I don’t have to do it every time I drive..
    BTW, I have seen a lot of posts from folks in the USA saying the system doesn’t seem to like low temperatures, as this is the coldest (and longest) winter we have had in the UK for some years I’m wondering if they might be right…..

  5. Awesome! Thank you so much! Your post was the only one I found that said hold the key combo for 10 seconds; and, of course, it didn’t work until I did that!

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