Cabin Air Filter / Purifier: Description and Operation
FILTER-PARTICULATE AIRDESCRIPTION
Some models are equipped with a particulate air filter (1) that helps purify the outside air entering the HVAC housing. The filter is mounted in the engine compartment, under the passenger side cowl grille screen. The filter should be replaced at least once a year or every 24,000 km (15,000 miles) and checked if heating-A/C system performance seems lower than expected. The particulate air filter is labeled with "REAR OF VEHICLE" and an arrow (2) to indicate air flow direction through the filter.