Replace your old and dirty air filter with a Drop-In Air Filter for your 2005-2006 Jeep Liberty 2.8L CRD. The air filter is a critical component in your vehicle and is designed to keep dust, debris, and contaminants out of your engine. Most factory-style drop-in air filters are made with a paper filter media, and aftermarket performance air filters generally use a cotton-gauze media that requires filter oil, or a synthetic dry media. Drop-in air filters are aptly named as they have a "drop-in" installation that allows them to fit inside of your factory air box. Replace the factory air filter on your vehicle with a quality drop-in air filter from S&B Filters, AFE, K&N Engineering, and others at XDP.