2008 Lexus GX 470 Owners Manual - Page 398

4-3. Do-it-yourself maintenance STEP 5 Remove the air conditioning filter from the filter case and replace it with a new one. The "↑UP" marks shown on the filter and the filter case should be pointing up. n Changing interval Inspect and replace the air conditioning filter according to the maintenance schedule. In dusty areas or areas with heavy traffic flow, early replacement may be required. (For scheduled maintenance information, refer to the "Warranty and Services Guide/Owner's Manual Supplement/Scheduled Maintenance".) n If air flow from the vents decreases dramatically The filter may be clogged. Check the filter and replace if necessary. NOTICE n When using the air conditioning system Make sure that a filter is always installed. Using the air conditioning system without a filter may cause damage to the system. 350