i dont think 2002s have cabin air filters. if it does you need to remove the entire glovebox. there are 3 screws inside the glovebox on the upper edge. there is a 10mm bolt on the left lower side of the fascia(remove the plug that covers it to find it) take off the right side kick panel to expose the last 10mm bolt then pull out on the whole assembly. the glovebox door must be open to do this. once removed, you see a little drawer (about 2"x8") in the heater assembly. remove it and the rest is obvious.
Oil filterI may have found the answer for you.Oil filter is located inside a housing attached to the oil pan .Oil filter is not a spin on design it is cartidge style.And on the Edmunds site, there is apparently a PDF file from the service manual showing the change procedure.Here's where I found the info:http://www.tundrasolutions.com/forums/Avalon/46882-oil-filter-location-3-5l-2-a/
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