2010 Toyota Highlander Owners Manual - Page 495

4-3. Do-it-yourself maintenance STEP 5 Remove the filter cover. n Replacement method Remove the air conditioning filter and replace it with a new one. The "↑UP" marks shown on the filter should be pointing up. n Checking interval Inspect and replace the air conditioning filter according to the maintenance schedule. In dusty areas or areas with heavy traffic flow, replacement may be required. (For scheduled maintenance information, please refer to the "Scheduled Maintenance Guide" or "Owner's Manual Supplement".) n If air flow from the vents decreases dramatically The filter may be clogged. Check the filter and replace if necessary. 470