The retrofit is very easy. Once you remove the lower beauty/sound cover on the passenger side, you can see the outline on the bottom of the HVAC plenum.
I went with the Dorman 259-201 kit. It comes with the carbon filter and a good set of instructions.
Dorman 259-201 Carbon Cabin Air...
https://www.amazon.com/dp/B00NF1SK1M?ref=ppx_pop_mob_ap_share
For cleaning, I referenced this video. In addition, I also cleaned things from the inside the cabin using the opening I cut for the filter and used the cleaner with a nylon brush. I also dropped the sensor and fan to clean in the plenum. There was lots of dust. Lol, I also plan to remove the wiper cowl and clean from the top side. There’s debris on top of the outside air intake screen.
Plans to also do something similar to the rear HVAC core/condenser & plenum. I don’t expect it to be as bad since it only pulls air from the cabin.
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