🔧 Fusion - Fuel Pump Replacement

On your Fusion, the fuel pump is an electric pump inside the fuel tank (often sold as a complete “fuel pump module” with the level sender). Replacement involves safely depressurizing the fuel system, opening the access panel under the rear seat, disconnecting the lines/wiring, and swapping the module.

Difficulty Level: Advanced | Estimated Time: 2-4 hours

Assumption: in-tank fuel pump module accessed under rear seat.

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⚠️ Safety & Precautions

• ⚠️ Work outside or in a well-ventilated area; fuel vapors are flammable.
• ⚠️ No smoking, no sparks, and keep a fire extinguisher nearby.
• ⚠️ Depressurize the fuel system before disconnecting any fuel lines.
• ⚠️ Disconnect the 12V battery negative cable to prevent the pump from running.
• ⚠️ Hybrid caution: do not touch orange high-voltage cables/connectors.
• ⚠️ Clean dirt around the pump opening so debris doesn’t fall into the tank.

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🔧 Required Tools

You'll need the following tools for this repair:

• 8mm socket
• 10mm socket
• 1/4" drive ratchet
• 3/8" drive ratchet
• 3" extension
• Trim clip removal tool
• Flat-blade screwdriver
• Fuel line disconnect tool set
• Fuel pump lock ring tool (specialty)
• Torque wrench (in-lb)
• Torque wrench (ft-lb)
• Needle-nose pliers
• Shop rags
• Catch pan
• Marker or paint pen
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel pump module assembly - Qty: 1
• Fuel pump module seal / O-ring - Qty: 1
• Fuel line retaining clips - Qty: 1 set

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Open a window or leave a door open so you don’t lock keys inside.
• Relieve fuel pressure: remove the fuel pump fuse/relay, then start the car and let it stall; repeat once. Use needle-nose pliers if needed for the fuse/relay.
• Disconnect the 12V battery negative cable using a 10mm socket, then wait 2 minutes.
• Have shop rags and a catch pan ready—some fuel will drip.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Access the fuel pump service cover

• Fold the rear seat backs down if needed for room.
• Remove the rear seat bottom cushion (release the front latches). Use a trim clip removal tool to help lift without tearing upholstery.
• Locate the round/oval service cover in the floor above the fuel tank.
• Remove service cover fasteners using an 8mm socket (some covers use clips—use a flat-blade screwdriver carefully).

Step 2: Clean the area and mark orientation

• Wipe/vacuum all loose dirt around the pump opening using shop rags.
• Use a marker or paint pen to mark the pump module position relative to the tank. This helps the new module sit the same way.

Step 3: Disconnect the electrical connector

• Press the connector lock tab and unplug the pump wiring connector by hand.
• If it’s stuck, wiggle—don’t yank wires.

Step 4: Disconnect the fuel lines

• Place a catch pan and shop rags under the line connections.
• Use a fuel line disconnect tool set to release the quick-connect fittings.
• Quick-connect = push-on fitting with internal clip.
• Cap/cover the lines with shop rags to keep dirt out.

Step 5: Remove the fuel pump lock ring

• Install the fuel pump lock ring tool (specialty) onto the lock ring.
• Use a 3/8" drive ratchet (and 3" extension if needed) to turn the lock ring counterclockwise until it releases.
• Do not use a hammer and punch—sparks risk.

Step 6: Remove the old fuel pump module

• Lift the module straight up slowly. Tilt as needed to clear the float arm (fuel level sensor arm).
• Float arm = the thin arm with a small “bobber”.
• Drain fuel from the module into the catch pan.
• Remove the old tank seal/O-ring from the tank opening by hand; use a flat-blade screwdriver only if necessary.

Step 7: Install the new seal and new fuel pump module

• Install the new fuel pump module seal / O-ring into the tank groove. Make sure it sits flat and isn’t twisted.
• Lower the new pump module into the tank, guiding the float arm carefully.
• Align the module to your marker or paint pen marks.

Step 8: Reinstall and tighten the lock ring

• Thread the lock ring on by hand first to avoid cross-threading.
• Tighten the lock ring with the fuel pump lock ring tool (specialty) and 3/8" drive ratchet until fully seated/locked at the stops.
• If your replacement lock ring includes a torque spec, use a torque wrench (ft-lb) and follow that spec.

Step 9: Reconnect fuel lines and electrical

• Push fuel lines on until they click/lock. Use your hands only.
• Install any new fuel line retaining clips as required.
• Reconnect the electrical connector until it clicks.

Step 10: Reinstall the service cover and rear seat

• Reinstall the service cover and tighten fasteners using an 8mm socket.
• Reinstall the rear seat bottom cushion; press down firmly to latch it in.

Step 11: Restore power and prime the fuel system

• Reconnect the 12V battery negative cable using a 10mm socket.
• Reinstall the fuel pump fuse/relay (if removed).
• Key ON (engine OFF) for 5 seconds, then OFF for 10 seconds; repeat 3 times to prime the system.

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✅ After Repair

• Start the car and let it idle while you check for fuel smell and leaks at the pump and line connections.
• Turn the car off and re-check for dampness around the lock ring and lines using a dry shop rag.
• If a check engine light appears, use a scan tool to check fuel pressure-related codes (often set if the system wasn’t fully primed).
• Take a short test drive, then do one more leak check when you return.

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💰 DIY vs Shop Cost

Shop Cost: $650-$1,300 (parts + labor)

DIY Cost: $250-$700 (parts only)

You Save: $400-$600 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-4 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.