2007 Hyundai Sonata

1.Remove the damper (A) from the glove box after removing the side cover.

2.Open the glove box (A). Lower the glove box down completely by removing the glove box stopper (B) to the glove box.

3.Remove the filter cover (A) with pushing the knob.
4.Replace the air filter (B), install it after making sure of the direction of the air filter flow. *Replacement interval: 15000 km (9320 miles)

https://www.2carpros.com/kpages/auto_repair_manuals_alldata.htm