2009 Lexus SC 430 Owners Manual - Page 251

4-3. Do-it-yourself maintenance Filter 2 Filter case Remove the air conditioning filter from the filter case and replace it with a new one. 1 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, such as inner city or desert areas, early replacement may be required. (For scheduled maintenance information, please refer to the "Warranty and Services Guide/Owner's Manual Supplement/ Scheduled Maintenance".) n If air flow decreases dramatically 4 Maintenance and care The filter may be clogged. Check the filter and replace if necessary. NOTICE n When using the air conditioning system Use of the system with the air filter removed or improperly installed could result in a malfunction. Make sure that a filter is always installed. n Do not wash or air-blow the filter Do not wash or air-blow the filter or it may cause the system to malfunction. Always replace dirty filters. 255