You can't. The Sienna didn't have them until 2004.
It doesn't have a cabin filter.
The cabin air filter is located behind the glove compartment. If you unhook the glove box on both sides the filter case is inside. You pull it out and replace the filter. It shows pictures of this is in the manual
the air filter is under the hood unless your asking about the cabin air filter for the inside air that's coming in for the ac system its behind the glove box
Tundras do not have a cabin air filter
On my 2004 Sienna I have to take out my glove box (it is held in with (2) 10 mm bolt. You have to lay on your head to see the screws. The filter is right behind the glove box after you remove it.
It doesn't have a cabin filter. They came out with cabin filters in the Tacoma in 2005.
Tacoma models from 95.5-04 did not have a cabin filter.
Yes, that filter fits a 2004 Toyota Sienna. But, I would not recommend a Fram filter. Purolator, Bosch, & Wix, all make superior filters to the Fram.
In my 2004 it is behind the glove box.
The Sequoia is the only V8 Toyota without a Cabin Air filter
On the 2004 and later models, there is a mesh filter inside the pan. You have to drop it to change the filter