2007 Lexus ES 350 Navigation Manual - Page 63

ES350_Navi_U (L/O 0603) AIR CONDITIONING 247 4. Remove the filter. Be sure that the correct side of the filter faces up when installing it. 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, please refer to the "Warranty and Services Guide/Owner's Manual Supplement/Scheduled Maintenance".) If air flow from the vents decreases dramatically The filter may be clogged. Check the filter and replace if necessary. INFORMATION The air conditioning filter should be installed properly in position. The use of air conditioning with the filter removed may cause deteriorated dustproof performance and then affect air conditioning performance.