It should take about 20 minutes.
Here's how you do it:
Open the engine compartment (instructions are in your owner's manual).
The air box is on the driver's side up against the outside wall (see pic below). It clips off and the filter slides out.
Lube the slides and joints that operate the top and the top cover WYAIT. Plain old white lithium grease and a Q-tip will do the job.
Do the cabin filter too while you're at it. It will keep the A/C from smelling stale. It's in the front trunk to the right (passenger side) of the battery under a plastic cover. I think you have to take the battery cover off then there's a small torx screw for the cabin filter compartment. That's where your A/C test/fill point is too.
Enjoy!
