Lexus ES300 2003 Manual page 186

AIR CONDITIONING
3. Take out the filter case.
4. Remove the filter from the filter case.
5. Inspect the filter on the surface.
If it is dirty, it should be replaced.
172
INFORMATION
The air conditioning filter should be installed properly
in position. The use of air conditioning with the filter
removed may cause deteriorated
performance and then affect
performance.
dustproof
air conditioning