A fuel filter is a crucial component in a vehicle's fuel system. Its primary function is to remove impurities and contaminants from the fuel before it reaches the engine. This helps ensure that the engine runs smoothly and efficiently, preventing damage and maintaining performance. Regular maintenance of the fuel filter is important, as a clogged filter can lead to reduced fuel flow and engine performance issues. Depending on the vehicle, fuel filters may need to be replaced every 15,000 to 30,000 miles. Keeping the fuel filter clean contributes to the overall health of the engine and extends its lifespan.