2005 Ford 500 Fuel Pump Location: Your Complete Guide to Finding and Replacing It

The bottom line: On a 2005 Ford Five Hundred (also called the Ford 500), the fuel pump is located inside the fuel tank, which sits underneath the rear of the vehicle. The fuel pump is a single in-tank unit, not a dual-pump system, and it is part of the fuel pump module assembly that includes the sending unit. Accessing it requires either dropping the fuel tank or, in some cases, removing the rear seat cushion to reach an access panel. The job is moderately complicated and best handled with proper preparation and safety precautions.

What Type of Fuel Pump Does the 2005 Ford Five Hundred Use?

The 2005 Ford Five Hundred is equipped with a single in-tank electric fuel pump. There is no secondary or external pump. The pump is part of a returnless electronic fuel injection (EFI) system that serves the 3.0L Duratec V6 engine. The pump sends fuel under high pressure directly to the fuel rail and injectors.

The entire assembly — including the pump, fuel level sending unit, and often the fuel filter — is housed inside the fuel tank. When you replace the fuel pump, you typically replace the entire module or at least the pump portion inside it. The OEM part number for the fuel pump assembly (right-hand side) is commonly referenced as 6G1Z17682C.

Where Exactly Is the Fuel Pump Located?

Inside the fuel tank, under the right rear passenger area.

Here is the breakdown of the location in simple terms:

  1. Fuel Tank: The fuel tank is mounted underneath the vehicle, toward the rear, on the passenger (right) side.
  2. Fuel Pump Module: The fuel pump module is installed inside the tank, accessible from the top of the tank.
  3. Access Point: To reach the top of the tank and remove the pump module, you have two options:
    • Remove the rear seat cushion: On many models, there is an access cover underneath the rear seat cushion on the right side. Lifting the rear seat cushion and pulling back the carpet reveals a metal or plastic cover plate.
    • Drop the fuel tank: If the access panel is not present or if the job requires more room, you will need to lower or completely remove the fuel tank from under the vehicle.

Safety First: What You Must Do Before Touching Anything

Working with fuel is dangerous. The 2005 Ford Five Hundred has a fuel pump shut-off switch (inertia switch) that you should be aware of, but the primary safety steps come before any disassembly.

Step 1: Relieve fuel system pressure. The fuel system operates at high pressure. To release it, locate the fuel pump relay in the fuse box under the hood. Remove the relay, then start the engine and let it idle until it stalls. This drains the pressure from the lines. After it stalls, turn the ignition off and reinstall the relay.

Step 2: Disconnect the negative battery cable. This is critical. The battery ground cable (black wire connected to the negative terminal) must be disconnected before any work near wiring or fuel components. This prevents sparks and accidental electrical shorts. Use a wrench to loosen the clamp, remove the cable, and tape the terminal so it cannot accidentally touch metal.

Step 3: Release the fuel tank filler cap. Slowly turn the gas cap counterclockwise to release any remaining pressure in the tank.

Step 4: Have a fire extinguisher nearby and work in a well-ventilated area. No open flames, no smoking, and no using your phone near the work area.

How to Access the Fuel Pump (Step-by-Step)

There are two main approaches. Below is the most common DIY-friendly method using an under-seat access panel. If your vehicle does not have the access panel, you will need to drop the fuel tank.

Method 1: Access Through the Rear Seat (If Access Panel Exists)

This method is faster and does not require jacking up the vehicle.

  1. Relieve fuel pressure and disconnect the battery. As described above.
  2. Remove the rear lower seat cushion. On the 2005 Ford Five Hundred, the rear seat bottom cushion can be removed by pulling up on the front edge to release the latches. You may need to pull firmly. Once released, lift the cushion out of the vehicle.
  3. Pull back the carpet. Under the right side of the seat area, you will see a section of carpet. Carefully pull it back or peel it away to expose the floor pan.
  4. Remove the fuel pump module access cover. You will see a round or rectangular metal or plastic cover held in place by screws or bolts. Remove them and lift the cover off. You will now see the top of the fuel pump module.
  5. Disconnect the electrical connector and fuel lines. Unplug the wiring harness from the top of the module. Then, carefully disconnect the fuel supply tube and the fuel vapor control tube. These are often quick-disconnect fittings. Use a rag to catch any fuel drips.
  6. Remove the lock ring. The fuel pump module is held in the tank by a large threaded lock ring. Use a hammer and a brass punch or a special fuel pump lock ring tool to tap the ring counterclockwise until it is loose. Do not use a metal tool that could spark. Remove the ring by hand.
  7. Lift the module out of the tank. Carefully lift the fuel pump module straight up and out of the fuel tank. It will have fuel inside it, so tilt it to drain into a fuel-safe container. Be careful not to bend the float arm on the sending unit.

Method 2: Dropping the Fuel Tank

If your car does not have the under-seat access, or if you prefer to replace the entire tank or fuel lines, you must drop the tank.

  1. Relieve fuel pressure and disconnect the battery.
  2. Drain the fuel tank. Use a fuel siphon or a drain tube inserted into the filler pipe to remove as much fuel as possible. This makes the tank much lighter and safer to handle.
  3. Jack up the vehicle securely. Place jack stands under the frame and ensure the vehicle is stable. Never work under a car supported only by a jack.
  4. Disconnect the filler pipe hose. Locate the fuel tank filler pipe on the passenger side. Use a screwdriver to loosen the clamp and disconnect the hose from the tank.
  5. Support the fuel tank. Place a floor jack with a block of wood under the center of the fuel tank to support its weight.
  6. Remove the fuel tank straps. There are two metal straps holding the tank in place. Remove the bolts or nuts securing them to the vehicle frame.
  7. Lower the tank slightly. Lower the jack just enough to access the top of the tank. Disconnect the fuel pump electrical connector and the fuel supply and vapor lines.
  8. Remove the tank completely. Lower the tank all the way and slide it out from under the vehicle. Place it on a flat, stable surface.
  9. Remove the fuel pump module. With the tank out of the car, follow steps 5, 6, and 7 from Method 1 to remove the lock ring and lift out the module.

How to Know If Your Fuel Pump Is Failing

Before you go through the trouble of replacing the pump, you should confirm it is actually the problem. Here are the most common symptoms of a bad fuel pump on a 2005 Ford Five Hundred:

  1. Engine sputters or chokes at high speeds. The pump cannot maintain enough pressure to keep up with the engine's demand.
  2. Loss of power under load. The car feels sluggish, especially when accelerating or climbing a hill.
  3. Difficulty starting. The engine cranks but takes longer than usual to start, or it cranks and does not start at all.
  4. Whining noise from the fuel tank. A healthy fuel pump makes a low hum. A high-pitched whining or buzzing sound indicates the pump is wearing out and struggling.
  5. Engine surges. The car speeds up and slows down without you pressing the gas pedal, because the fuel pressure is inconsistent.
  6. Check Engine Light. A failing pump can trigger diagnostic trouble codes related to fuel pressure or lean fuel mixture.

If you experience any of these, start by checking the fuel pump shut-off switch, also known as the inertia switch. It is located in the front passenger footwell, in the right upper corner behind the trim panel. If this switch has popped up (often after a hard bump or minor accident), the fuel pump will not run. Simply push the button back down to reset it. If the car starts, your problem is solved.

What Tools and Parts Do You Need?

Tools required:

  • Wrench or socket set for battery cable and seat bolts
  • Screwdrivers (flathead and Phillips)
  • Fuel line disconnect tool (for quick-connect fittings)
  • Brass punch or lock ring removal tool
  • Hammer
  • Floor jack and jack stands (if dropping the tank)
  • Fuel-safe drain container
  • Rags and gloves

Parts needed:

  • Fuel pump module assembly (includes pump, sending unit, and filter) or just the pump, depending on your choice. The OEM part number for the assembly is often 6G1Z17682C or equivalent.
  • New lock ring gasket or O-ring (recommended)
  • Fuel filter (if not integrated into the pump assembly)

Cost of Replacing the Fuel Pump

The cost varies depending on whether you do it yourself or hire a professional.

  • DIY parts cost: $50 to $300, depending on the brand and whether you buy just the pump or the entire module. A complete OEM-style fuel pump assembly for this vehicle typically ranges from $126 to $250.
  • Professional shop cost (parts and labor): $200 to $500 for a basic job. However, many independent shops and dealerships charge between $555 and $748 total. Labor alone is often estimated at $149 to $189, with parts between $406 and $559.
  • National average for fuel pump replacement: Across all vehicles, the average cost is between $611 and $894.

If you go the DIY route, you can save between $100 and $400 in labor costs. The job typically takes 1 to 3 hours for an experienced DIY mechanic.

KEMSO Fuel Pump: A Reliable Replacement Option

When it comes time to replace the fuel pump on your 2005 Ford Five Hundred, you want a part that delivers dependable performance without breaking the bank. KEMSO Fuel Pumps are built with exactly that in mind.

KEMSO offers high-performance, OEM replacement fuel pumps designed to meet or exceed the factory specifications for your vehicle. Every KEMSO fuel pump is engineered for precise fuel flow and pressure, ensuring your engine gets the fuel it needs for smooth operation and better fuel efficiency. Whether you are tackling the job yourself or having a shop do it, choosing a quality part makes all the difference.

One of the biggest advantages of choosing KEMSO is the confidence that comes with a lifetime warranty. That means you are covered for the life of your vehicle — if your KEMSO fuel pump ever fails due to a manufacturing defect, it will be replaced at no additional cost. It is a promise of quality and durability that few other brands offer.

If you are ready to get your 2005 Ford Five Hundred back on the road with a reliable fuel pump, visit the KEMSO website to browse their selection. They specialize in fuel pumps for a wide range of vehicles and are committed to fueling your adventure with parts backed by a lifetime of confidence.

Visit KEMSO Racing online at: https://www.kemsoracing.com/

Final Tips for a Successful Replacement

  • Replace the fuel filter too. If the pump failed due to contamination, the old filter (if external) is likely clogged. If the filter is integrated into the pump module, you are already replacing it.
  • Keep the tank above a quarter full. Running the tank low frequently causes the pump to run hot and suck in debris from the bottom of the tank, shortening its lifespan.
  • Check the inertia switch first. Before you tear apart the car, always check that the fuel pump shut-off switch in the passenger footwell has not tripped. It can save you hours of unnecessary work.
  • Work clean. Fuel system contamination is a leading cause of premature pump failure. Clean the area around the pump module before removing it, and never introduce dirt or debris into the tank.
  • Test before full reassembly. After installing the new pump, reconnect the battery briefly to prime the system. Turn the key to the ON position (but do not start) for a few seconds, then turn it OFF. Repeat this two or three times to build fuel pressure. Then check for leaks before putting the seat or tank back in place.

Visit KEMSO Racing online at: https://www.kemsoracing.com/ — for high-performance OEM replacement fuel pumps with a lifetime warranty.


Back to blog