What Does the Directional Arrow on the Cabin Air Filter Indicate?
1 Answers
Car cabin air filter directional arrow indicates the front and back sides of the filter, with the arrow pointing in the direction of airflow, which is also the installation direction. Below are details about the directional arrow on cabin air filters: Meaning: When the arrow points upward, it indicates the front side, which should face the airflow direction during installation. Alternatively, you can determine the front and back sides by observing the filter surface: the ordinary fuzzy side is the front (facing upward toward airflow), while the side with support line structure is the back (facing away from airflow). For activated carbon filters, the black side facing airflow is the front, while the white side facing away is the back. Replacement Interval: The replacement cycle for car cabin air filters depends on individual driving habits, external environment, and seasonal climate. Generally, urban household vehicles should replace it every 10,000-20,000 kilometers or once a year. If driving in dusty or poor conditions, the filter gets dirty faster, requiring more frequent replacement. Additionally, seasonal variations in AC usage affect replacement intervals. During seasons with less AC use (like autumn), the replacement cycle can be slightly extended.
