Hi
lex51s is correct there is a polin fitler behind the glove box.
It is a little expensive to replace and if it's not there when being serviced they wont put one in for free.
You will have to ask them to. Or go in a give them this part number LX 87139-48030 but make sure they
sell you the Lexus polin filter not the Toyota one, the Lexus one is cheaper.
Enjoy your day