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  1. K

    Signature: Invalid! ???? Has anyone seen this?

    Found this when learning about upgrades. There is info in section 5.3...far into post. It tells of procedure to reset cache, sounds like your issue. https://mazda3revolution.com/forums/2014-2018-mazda-3-skyactiv-audio-electronics/180578-mazda-mzd-connect-firmware-downloads-updated.html?