The Active Carbon Filter is an OEM part for Bosch refrigerators. This filter helps reduce odor-causing substances inside the refrigerator for fresher preserved food. It traps molecular impurities through an advanced filtration process. Causes of a filter requiring replacement include normal lifespan expiration as indicated on the packaging. For optimal results, these filters should be replaced according to manufacturer guidelines. Symptoms of a spent filter include: Return of odors to the refrigerator interior Potential taste transfers between strong smelling foods Reduced effectiveness of the odor reduction system This genuine OEM Bosch part is also compatible with Thermador, Gaggenau and select Kenmore models.00614665 (AP5984522) replaces 00625432, 00617681, 1560221, 614665, 617681, 625432, PS8727781.