How to Change a 2002 VW Jetta Fuel Filter | It Still Runs The fuel filter in your 2004 VW Jetta should be replaced every 20,000 to 30,000 miles to avoid it clogging up over time. The filter is responsible for preventing debris in the gas tank from entering the fuel system itself. A clogged filter can cause many problems, from rough running and poor fuel 2002 Volkswagen Jetta Replacement Fuel Filters – CARiD Volkswagen Jetta 1.9L 2002, Diesel Fuel Filter by MANN-Filter®. This filter will provide superior protection to the engine from any dirt, dust, and other contaminants. It ensures maximum safety margins for the entire service life.