Cabin filter Fram or OEM Nissan
replace cabin air filter recommended every 15K miles
Changed cabin filter twice myself.
Cabin air filter is something you need to replace periodically. $130 seems high but I have tried it myself and found it to be a PITA. I took it to a dealer, who charged something like $100 but it felt worth it to me.
The Genesis OE filter is $75!! The Fram Fresh Breeze filter is $25 or less; it combines activated charcoal with baking soda to reduce HVAC odor. I've used them in all my vehicles since Fram introduced the Fresh Breeze filter line and found them remarkably effective.
I did the air box filter and cabin filter myself (Fram stuff).
FRAM TrueAir for me - smelled much fresher in the cabin for a little while, but nothing spectacular...
Otherwise, the Fram cabin filters are fine, too.
After having a fram cabin air filter in my dad's frontier reduce the airflow out of the vents by a good 15%-20% you guessed it... dealership
Now, I just replaced the cabin filter on my (new to me) 2021 Kia Soul for the second time in 9 months and the new one which is a Fram, smells so musty and stale when it’s on recirculate, I might just replace it with another one to see if it makes a difference. It literally smells like stale moth balls. If I take the filter out and run it, smell goes away.
IMO, don't get the really thick ones with carbon (like Fram FreshBreeze) - they restrict airflow and can cause the resistor and motor to overheat (essentially it's like a clogged/dirty filter)
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