I doubt if it has one. Cabin air filters appeared about 2002. Walmart carries Fram cabin air filters. Look in the Fram application catalog to see if the 97 Avalon is listed.
http://www.allergybegone.com/toyota-avalon-celica-camry-cabin-air-filter.html
I believe the cabin air filter is located in the glove compartment. maybe behind that, You will have the check with your local parts store or with a Toyota dealer for the filter.
How do you replace cabin air filter in 1995 Toyota Previa?
to my knowledge, it has no cabin filter!
By not changing it, because it does not exist.
Purchase a Purotor filter. It comes with complete instructions.
toyota sienna 2001
It doesn't have one. That car didn't come with a cabin filter.
remove the glove box,
There isn't one
you change the cabin filter which is located inside the glove per say. you open the glove box door and take a screw driver and drop the hinge you see the cover for the cabin filter, remove the cover slide the old one out replace the new one.
there is no cabin filter on that year model 2003 and up models only