A cabin air filter is a component in vehicles that helps improve the air quality inside the cabin. It filters out dust, pollen, and other airborne particles, ensuring that the air passengers breathe is cleaner and healthier. This filter is especially important for individuals with allergies or respiratory issues. Typically located behind the glove compartment or under the dashboard, the cabin air filter should be replaced regularly, usually every 12,000 to 15,000 miles. A clogged filter can reduce airflow from the heating and air conditioning systems, making it less effective and potentially leading to unpleasant odors inside the vehicle.