Posted on 9/26/2025

If you sneeze, feel irritation, or just discomfort every time you get behind the wheel, your car’s cabin air filter could be part of the problem. This important filter is responsible for cleaning the air that comes through your heating and air conditioning system. When it’s dirty or clogged, it can circulate dust, pollen, and other irritants right back into your cabin. For drivers in San Jose and Milpitas, where seasonal allergies are already a challenge, a neglected cabin air filter can make driving much less comfortable. What a Cabin Air Filter Actually Does The cabin air filter is often hidden behind the glove box or under the dashboard. Its job is to trap dust, pollen, mold spores, and even exhaust fumes before they reach the interior. Think of it as the last line of defense between outside air and your lungs. A clean filter helps your HVAC system deliver fresh air inside the cabin. Over time, however, the filter fills up with debris, reducing airflo ... read more