The filter removes dust and pollen from the air which is drawn into the vehicle. Airflow reduction is an indication that the filter needs to be replaced.
The filter should be replaced as part of routine scheduled maintenance. See Scheduled Maintenance for replacement intervals. To find out what type of filter to use, see Maintenance Replacement Parts .
To access the passenger compartment air filter:
Install the new air filter with the AIR FLOW arrow pointing downward. Reverse Steps 1 through 3 to reassemble.