Swap out the dirty factory air filter in your 1992-2006 & 2009-2016 Volkswagen 1.9L/2.0L TDI with a high-quality Drop-In Air Filter. 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. 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. A drop-in air filter is named after the simple installation as it simply drops into the factory airbox in most applications. The air filter in your vehicle serves as the first line of protection against harmful airborne debris that can damage your engine.