Does installing the cabin air filter backwards affect its performance?

[VanMarley]

Installing the cabin air filter backwards does affect its performance, as it will reduce the airflow from the air conditioning system and impair its filtration efficiency. The functions of the cabin air filter include: 1. Ensuring a tight seal between the filter and the housing to prevent unfiltered air from entering the cabin; 2. Separating solid impurities such as dust, pollen, and abrasive particles from the air; 3. Absorbing moisture, soot, ozone, odors, carbon oxides, SO2, and CO2 from the air; 4. Preventing condensation on the car windows, thereby maintaining clear visibility for drivers and passengers and ensuring driving safety; 5. Providing fresh air to the cabin and protecting occupants from inhaling harmful gases.