2003 ford expedition dvd install

You will need to support the unit with thin sheet metal inserted through the center ac roof vent hole, (which will be covered by the flip down unit).  This is what you will screw the support bracket onto through the headliner using self taping screws, (taking care not to screw through the roof of the car of course).  The larger the support between the headliner and the roof the less the unit will vibrate while traveling.  Keep in mind that the all in one unit is heavier than just a flat monitor and you will get some vibrations due to the headliner being somewhat flimsy.  Also, I was able to get power from the overhead console if you have that option.  Good luck...