This is the same procedure I use on my 02 Avalon. However, you do not have to do the thing with the air bag harness (Steps 1b and 1c) or disconnect the trunk switch (Step 1e). After you remove the four screws and the bolt (it's 10mm, by the way), you have to pull forward on the glove box assembly to release the clips along the top front. Then you can just let it hang on the wires; there is plenty of room to reach in and pull tray with cabin air filter out. I replace mine once a year just after pollen season and it is always black with stuff; just did it for 2011.