How often should the cabin air filter and engine air filter be replaced in a sedan?

[LeEmiliano]

The cabin air filter should typically be replaced every 10,000-20,000 kilometers or approximately once a year, while the engine air filter requires replacement around every 15,000 kilometers. Below is relevant information: 1. Conditions requiring shorter replacement intervals: The actual replacement frequency depends on the vehicle's usage conditions, driving environment, and air quality. In cases of poor environmental conditions, high humidity, excessive dust, or in smog-prone cities, the replacement interval should be appropriately shortened. Similarly, during periods of severe haze or heavy poplar fluff, the replacement cycle should also be reduced. 2. Cabin air filter location: The cabin air filter is generally located behind the glove compartment on the passenger side, though some vehicle models position it beneath the windshield's air deflector channel. Its function is to filter outside air entering the vehicle through the air conditioning system, particularly removing external dust during recirculation mode, with the primary purpose of protecting the vehicle's occupants.