Please refer to the video below, noting this was recorded in a 2021 Model 3. The process for Model Y, and earlier Model 3's is the same, with the exception that the torx screw to remove the access panel is at the top, rather than the bottom, and you need to move the orange power cable out of the way.
Installing Air Filters for Model 3/Y
- by Pete White
- May 22, 2021