How to replace the cabin air filter in a 2014 Hyundai Elantra

Hyundai recommends replacing your cabin air filter (sometimes called a climate control air filter by Hyundai) every 15,000 miles.  Your dealer may charge you upwards of $50 to perform this task, but you can do it yourself for about $15 and five or ten minutes of your time.  You don't even need any tools.

The cabin air filter is located behind the glove box.  To remove it, first turn off the car and open the passenger side door.  (Otherwise the glove box won't be able to come out fully.)  The glove box will need to open farther than it usually does, so it's a good idea to remove any contents so they don't spill out.

Open the glove box and look inside.  On either side, you'll see a plastic round piece that holds the glove box in place.  Remove both of these plastic stoppers, one at a time, by turning them counter-clockwise and then sliding them out (toward the inside of the glove box).  With both stoppers removed, the glove box will swing down toward the floor.

Behind the glove box is a cavity with a bunch of car innards.  You should see a long black plastic cover right in front of you; that is the cabin air filter cover.  Remove the cover by pushing inward on the two tabs (on one either side of the cover) and then pulling the cover out, toward you.

Now you can see the cabin air filter.  It looks like a white or gray paper rectangle.  Grasp it and pull it straight out to remove it.  (There may be dirt or bugs on top of the filter.)  Hold your new cabin air filter in the same orientation, with the arrow on the side pointing down, and then slide it into the slot vacated by the old filter.  Reattach the cover -- the side with the large plastic flap goes up -- so that the two tabs snap into place.

Pull your glove box back up so that it's mostly closed, but still open enough to get your hands inside.  Reattach the round stoppers one at a time by pushing them into the holes and turning them clockwise.  For the first one, make sure that the stopper hole lines up with the hole in the car; otherwise, if the glove box isn't up far enough, the stopper will prevent the glove box from closing.  Once you have attached the first stopper, you can let go of the glove box while you attach the second one.

You have now successfully replaced your cabin air filter.  Close your glove box and close your passenger side door, and your job is done.