My Buick was in need of the cabin air filter (CAF), and I stopped many times at the local walmart to get a Fram version with the charcoal. I could not, and it was getting to the point that airflow was slowing down due to restriction. I bought a store brand local auto-parts store version...not sure if it was already used, or what, but I swear I can smell cigarette smoke when I first start the car, that I have never smelled before. I have a new Fram charcoal filter sitting on my bench for the next time it warms up enough to do the install.