Lexus GS430 User Manual page 300

AIR CONDITIONING
1. Turn the air intake control to RECIRCULATED AIR
mode.
The filter case cannot be removed in the OUTSIDE AIR mode.
2. Turn off the engine switch.
3. When you replace the filter, be sure to turn off the fan.
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4. Open the glove box and remove the partition by pulling.
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G21019
5. Pull the filter cover toward you.
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6. Push the tabs and pull the filter case toward you.