How often you need to replace your fuel filter depends on a few factors, such as the type of vehicle you drive and the quality of your fuel. In general, most fuel filters should be replaced every 30,000 miles or so. However, it's always best to consult your owner's manual or a qualified mechanic to be sure. If you have any concerns about your fuel filter, or if it's been more than 30,000 miles since your last replacement, it's probably time for a new one. Replacing your fuel filter is a relatively simple and inexpensive maintenance task that can help keep your engine running smoothly and prevent potential problems down the road.