Technician A says the cabin air filter should be replaced every 12,000 to 15,000 miles. Technician B states that some filters have a charcoal layer for odor absorption. Who is correct?

Both technicians are correct regarding their statements about the cabin air filter.

Replacing the cabin air filter every 12,000 to 15,000 miles is a widely recognized maintenance guideline in the automotive industry. Regular replacement helps ensure that the filter effectively traps dust, pollen, and other airborne particles, which contributes to better air quality inside the vehicle and improves HVAC system performance. This routine maintenance can enhance passenger comfort and the overall efficiency of the heating and air conditioning system.

On the other hand, the inclusion of a charcoal layer in some cabin air filters is an important innovation. Activated charcoal is known for its ability to absorb odors and harmful gases, which can significantly improve the quality of air entering the cabin. This feature is particularly beneficial in urban areas or when the vehicle is frequently subjected to pollution or unpleasant odors from the environment.

Thus, both statements regarding the maintenance and the design of the cabin air filter hold true, confirming that aspects of vehicle health and passenger comfort are being addressed properly.