5 minutes?!??! What took you so long? Did you count getting it from the mail box, walking up stairs to get car keys, have a cup of coffee, then the 10 seconds to swap the air filter? :)
I've seen people here post the same thing, no one's really said a fool-proof method to remove it.
I too have this mark from a mount that I haven't used for years.
Can anyone else confirm? I don't see the auto dimming light on my Homelink turn off and I can still operate the garage opener while in reverse, so it has power.
Also if it really does cut off, most Dashcam you can configure the delay before it shuts off when it no longer detects external power.
You can update it yourself with a USB. http://mazda3revolution.com/forums/2014-2016-mazda-3-skyactiv-audio-electronics/98202-mzd-connect-all-firmware-version-only-downloads.html
Yup, this is my 2nd new car, 1st car was first year Mazda3 2004. That one, the AC compressor blew up just after 60K too so warranty was useless.
My next cars in the future I will not get Extended Warranty.