Buy Nissan Altima Fuel Pump Module Assembly

The fuel pump module assembly-also called a fuel delivery module, gas-tank pump, or fuel sender unit-sits inside the Nissan Altima's fuel tank and pushes gasoline to the engine at about 50 psi. When it works, the car starts fast, runs smooth, and meets emissions rules. When it fails, you'll feel sputters, stalls, or a no-start. This guide covers how the pump works, warning signs, common causes of failure, safety recalls, green-fuel options, simple upkeep, and answers to everyday questions.

The assembly is a sealed plastic "bucket" that holds:

• Electric pump that spins like a tiny turbine.
• Sock strainer to catch rust and dirt.
• Fuel-level float for the dashboard gauge.
• Pressure regulator or jet pump on some years.
• Lock ring & rubber gasket that seal it to the tank.
  Cooling fuel surrounds the pump, keeping it quiet and long-lasting. See full breakdown (KEMSO)

• Pump motor - Heart of the module.
• Reservoir bucket - Stops fuel slosh on corners.
• Quick-connect outlet - Sends pressurized fuel to metal lines.
• Four-wire connector - Power in, gauge signal out.
  These pieces act together to keep pressure in the 49-53 psi range on a 2012 2.5 L Altima. Spec source

• Hard starting or long cranking.
• Sudden stall at lights or on hills.
• Loss of power when you press the gas.
• High-pitched whine from under the rear seat.
• Poor mpg or smell of raw fuel.
  These symptoms often show up in the order above. Full symptom list (KEMSO)

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Fuel contamination is the #1 killer, according to engineers at Carter Fuel Systems .

1. Relieve pressure. Pull the fuel-pump fuse, start the engine, and let it stall - the safest way to dump line pressure step-by-step guide .
2. Disconnect battery to stop sparks.
3. Access the pump. Most Altimas have a round panel under the rear seat; pop the seat cushion to reach it access note .
4. Unlock ring with a plastic mallet or special tool and lift the module straight up.
5. Install new rubber gasket; torque the ring evenly.
6. Prime the system. Cycle the key twice before cranking.

A how-to video shows the full process on a 2016 Altima. Watch here

Always work in a ventilated spot and keep a class B fire extinguisher nearby.

• Fuel filter: Listed as "maintenance-free (in-tank type)" in Nissan's Service & Maintenance Guide, so replacement means swapping the whole module. Guide PDF
• Multi-point checks: Nissan recommends inspecting fuel hoses for leaks each service interval.
• Pressure test: A simple gauge on the rail confirms pump health.

Nissan issued Recall PC692 for certain 2019 Altimas because the lock ring might not be fully engaged, risking leaks. A dealer tightens or replaces the ring and seal free of charge. See the NHTSA bulletin . Always run your VIN through the official Nissan recall lookup .

Modern Altimas can be converted to run E85 flex fuel using approved kits; check your specific model at eFlexFuel (eflexfuel.com). Remember that summer-blend gasoline must meet EPA Reid Vapor Pressure rules (9.0 psi or lower) to cut smog-forming vapors EPA RVP info .

• Common Altima pump part numbers include 17040-3TA0A / 3TA0B / 3TA0C, covering many 2013-2018 2.5 L and 3.5 L models.
• Earlier generations (2002-2006) use a smaller module but mount the same way under the seat.
• Always match the VIN when ordering; wiring connectors differ between trim levels.

Q: What pressure should I see on a gauge?
A: About 49-53 psi at idle on most 2.5 L engines. (JustAnswer)

Q: Is there a quick way to know the pump runs?
A: Turn the key to "ON." You should hear a 2-second hum from the tank. No sound may mean a blown fuse or bad relay. (KEMSO)

Q: Can dirty or watery gas ruin the pump?
A: Yes. Contaminated fuel blocks the strainer and overheats the motor. (carterengineered.com) Recent news of water-tainted fuel leaving drivers stranded shows why clean fuel matters. (The Sun)

Q: Do I have to drop the tank on an Altima?
A: Usually not. Most years have an access cover under the rear seat cushion. (JustAnswer)

Q: Why does running below ¼ tank hurt the pump?
A: Gasoline cools the motor. Low fuel lets it overheat and shortens life. (KEMSO)

Q: How often should I replace the fuel filter?
A: It's built into the module and labeled "maintenance-free" by Nissan; change the whole unit when pressure falls or after 120 k miles. (Nissan USA)

Q: What's the safest first step before replacement?
A: Depressurize the system by pulling the pump fuse and letting the engine stall, then disconnect the battery. (Urb's Garage)

Q: Are aftermarket flex-fuel kits safe?
A: Kits listed as compatible for Altima by eFlexFuel include wiring and sensors to adjust for ethanol blends. (eflexfuel.com)

Q: Does a recall mean my pump is bad?
A: Not always. The 2019 lock-ring recall concerns sealing, not the pump motor itself. Check your VIN to be sure. (NHTSA)

By understanding how the fuel pump module assembly works, spotting early warnings, and following safe service steps, you can keep your Altima's fuel delivery system healthy for years to come.