For 2009 or later Honda Pilot, it is very easy - a 5 minute job - and no tools required. The filters are around $25 from Honda (80292-SHJ-A41) but much cheaper after market.
I changed mine at 19K and it was VERY dirty. I would recommend changing every year - especially if you have Allergies.
For 2008 and older - you need to cut the plastic tab and take out screws.
HONDA PILOT .ORG - Changing out the cabin (dust/pollen) filter HONDA PILOT .ORG - Changing out the cabin (dust/pollen) filter
The typical change interval is every 12000 miles. I change the air filter and cabin filter at the same time.
See Honda Pilot dot org. http://www.hondapilot.org/forums/showthread/t-20409.html
The 1991 Honda Accord did not come equipped with a cabin filter.
The 1994 Honda Accord is not equipped with a cabin filter.
Under the seat
If you need to change cabin air filter on Honda Crosstour you need to follow some steps. Here you can find 1 artcle with pictures. http://filterlocation.com/honda-crosstour-cabin-air-filter-location/
The code B12 for a Honda Pilot indicates three different services that are needed. The B indicates that there is an oil and filter change required. The 1 is for a tire rotation and the 2 is for the replacement of the air filter and cabin filter, as well as the drive belt needs to be checked.
Purchase a Purolator Cabin Filter. It comes with complete instructions.
replace the cabin filter
Where & how dose one change the cabin filter for 2007 Honda odyssey?? Someone said it was behind the glove box, if so, how do you access it??
To change the cabin filter , bring down the lower glove compartment and right behind it you can't miss it, you will see the filter door.