2003 Lexus ES 300 replacing cabin air filter

Your cabin filter (a/c filter) is located in the blower motor housing, behind glove box
Open the glove box and disconnect the door from the damper
Remove the 2 pins on both sides of the upper part of glove box. Allow the glove box to hang down
Remove the cabin filter housing
Remove the filter from the housing
Install the filter by reversing the removal procedure. Ensure the filter element is installed facing the correct air flow direction on the housing.