Outside air pollutants such as sulphur dioxide, ozone, soot, nitrogen oxides, and pollen have free access to your engine compartment. If not addressed properly, these elements can block the air that’s needed by your engine to be able to function properly. Because of this, you car has been equipped with a cabin air filter. This auto part is your car’s primary line of defense against damage-causing elements to your engine, so your AC components and the health of your passengers are protected. You can see your cabin air filter in one of three possible locations—inside the glove box, under the dashboard, or under the hood. Your cabin air filter is also known as micron air filter, pollen filter, breather filter, interior ventilation filter, dust pollen filter, air conditioning filter, and dust filter. It serves two basic functions: first is to perform a mechanical filtration and second is to control odor-causing gases. Mechanical filtration is possible because your cabin air filter features a pleating and a special fiber material. These materials provide a lot of surface area to trap more particles. On the other hand, the odor-control properties of your cabin air filter is provided by the charcoal filtration layer. Through absorption, your cabin air filter is capable of trapping foul-smelling gases because charcoal is porous. A dirty air filter can reduce the airflow needed by your engine. For this reason, it would be better to replace your stock cabin air filter after around 12,000 to 15,000 miles of driving. You can also replace them if it shows some wear and tear signs like odors and mildew, or when it does not allow airflow into the vehicle cabin. Do not look much farther, because you can always find genuine and highly durable parts at our online store—without spending a lot.