Subaru Tribeca Manuals: 2011 Tribeca Owner's Manual | Page 187

Climate control CAUTION Contact your SUBARU dealer if the following occurs, even if it is not yet time to change the filter. – Reduction of the airflow through the vents. – Windshield gets easily fogged or misted. NOTE The filter can influence the air conditioning, heating and defroster performance if not properly maintained. 4-13