Aftermarket Mazda 6 navigation is a little bit bigger than other navigation. Generally speaking, the screen is 7 inch. As far as I know, few manufacturers in China can make such unit that supports the original LCD display above the airconditioner , please see the following picture.
First of all, use plastic knife to loosen the wind panel.
Start from each corner, try to pry the frame gently.
Second, after that, take out the wind frame away.
Third, remove the decoration bar around the stereo
Fourth, use screwdriver and take off the radio from the dashboard\
Fifth, install the bracket and connect all wires. The cable we provide is plug and play. Put the stereo back the the dashboard. And install the screws .
Sixth, install back all the frames and decoration bars.
If anybody have interest of car DVD , you can write to me for more info .

First of all, use plastic knife to loosen the wind panel.

Start from each corner, try to pry the frame gently.

Second, after that, take out the wind frame away.

Third, remove the decoration bar around the stereo

Fourth, use screwdriver and take off the radio from the dashboard\

Fifth, install the bracket and connect all wires. The cable we provide is plug and play. Put the stereo back the the dashboard. And install the screws .

Sixth, install back all the frames and decoration bars.

If anybody have interest of car DVD , you can write to me for more info .