VEHICLE APPLICATIONS: 1997-2014 Porsche 911; 1997-2013 Porsche Boxster; 2006-2012 Porsche Cayman FILTER CROSS REFERENCES: Bosch C3861; Porsche (996 571 219 01, 996 571 219 02, 996 571 219 03, 996 572 219 01, 996 572 219 02); Volkswagen (997 571 219 01, 997 571 219 00, 996 571 219 03) EASY INSTALL: This cabin air filter is located behind the glove box and on average will only take 15 minutes to replace the old filter with a new filter. It is important to replace your cabin air filter periodically to help keep the air in your vehicle clean. During extreme weather and heat, the HVAC system has to work harder and a clean cabin air filter is essential in helping your HVAC system run more efficiently. FRAM Fresh Breeze cabin air filters are the only cabin air filters built with Arm & Hammer baking soda combined with carbon embedded in the filter. Cabin air filters have proven to be essential as air quality can be severely affected by wildfire smoke, pollen, dirt, and other irritants. It is important to replace your cabin air filter periodically to help keep the air in your vehicle clean. This cabin air filter will help protect your vehicles heating and air conditioning unit while allowing for the most efficient air flow into the cabin of your vehicle.