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In the 2003 Ford Expedition with the 5.4 L V8, you can find the fuel filter on the driver side beneath the back door and under a plastic cover. This filter is crucial for safeguarding the engine against harmful debris by filtering out any particles that could potentially cause damage. If you notice signs like decreased engine performance, difficulty starting, stalling, misfiring, rough idling, or issues with the fuel system, it might indicate that the fuel filter needs to be replaced. It's recommended to change the fuel filter every 40,000 to 80,000 miles for the Expedition. The cost of a new fuel filter typically ranges from $70 to $90, not including labor expenses.
The fuel filter on a 2003 Ford Expedition can be found positioned between the gas tank and the frame rail, concealed under a plastic covering.