This isn't as bad as "where's my air filter?" but it's close... the upper airbox has a pad in it that looks like a secondary air filter, but I see no part number for just it, and it doesn't seem to be serviceable without replacing the entire upper airbox. Mine's dirty and I'm wondering if I should replace it, but it's a $275ish part from what I'm seeing online. The best I can do is remove the MAF sensor and vacuum/blow it out with a shop vac. Any ideas? FIGO? Replace? Cut it out because I know better than the Toyota engineers?
Pic stolen from eBay for reference.
Pic stolen from eBay for reference.