Lexus CT200h Owner's Manual page 526

4-3. Do-it-yourself maintenance
STEP 4
Remove the filter cover.
Left-hand drive vehicles
Right-hand drive vehicles
STEP 5
524
CT200h_OM_OM76067E_(EE)
Slide and pull out the filter.
Replace it with a new one.
The "UP" marks shown on
the filter should be pointing
up.