Subaru 2011 Tribeca Owner's Manual page 186

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 condi-
tioning, heating and defroster perfor-
mance if not properly maintained.
4-13
Climate control