Where is the cabin air filter of a 2001 Toyota Sienna located?

The cabin air filter in a 2001 Toyota Sienna is located behind the glove compartment. To access it, you need to open the glove compartment, remove any contents, and then detach the glove compartment door by squeezing its sides to allow it to drop down. Once the door is out of the way, you can find the filter housing and replace the filter if necessary.