How to Distinguish the Front and Back Sides of a Car's Cabin Air Filter?

1 Answers
MacHannah
07/29/25 10:08pm
There are two methods to distinguish the front and back sides of a cabin air filter: 1. Arrow direction on the car's cabin air filter: The arrow direction on the cabin air filter actually indicates the front and back sides of the filter. The direction the arrow points represents the airflow direction, which is also the installation direction. If the arrow points upward, that is the front side, and it should be installed with the front side facing the airflow direction. 2. By observing the surface of the air filter: The ordinary fuzzy side is the front side, facing upward towards the airflow direction, while the side with a support line structure is the back side, facing away from the airflow direction. For filters with activated carbon, the black side should face the airflow direction as the front side, and the white side should face away from the airflow direction as the back side.
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