Hi All,
I attempted this recently, took me about 5 minutes. So DIY and save $$$.
Mazda 6MPS:
Open the glove box and push in on the sides. There are two tabs located here (one on either side) Simply pushing in on the side of the glove box and pulling it forward (allowing the tabs to clear the console/dash) finishes this step.
Pull the glove box towards you. There are a set of notches on the bottom which clamp to the inside of the glove box which must be pulled free. Just pull the glove box and it should come off.
You should now see the air filter cover. Its held in place by two upper tab/slots and two lower clips. Pull down on the outer cover to free it from the tabs, then pull out towards yourself and it should come free, exposing the air filter.
Remove the old air filter and replace it with the new one. You may need to pinch the old filter horizontally to get it to squeeze out of the compartment. Its flexible and being tossed anyway, so don't worry about damaging it. As you can see at 12,680 miles the cabin air filter is quite dirty. The new filter slides in the same way the old one came out. Make sure the filter is sitting flush in its compartment, and is not angled or tilted. Make sure the AIR FLOW ARROW POINTS DOWN. Failure to adhere to this step could result in the climate fan being damaged, or a massive loss of horsepower (unconfirmed).
Put the cabin filter back on. Make sure after putting in the upper tabs to SNAP the lower section of the cover on by pressing on the clips on the bottom they are beveled to snap into place under the filter assembly. After this step, put the glove box back on, and your done!
Bit similiar to this: http://www.wonderhowto.com/how-to-ch...filter-339869/
Mazda 3MPS: