2005 Nissan Murano Fuel Pump Replacement: A Complete DIY Guide

The bottom line: If your 2005 Nissan Murano is hard to start, sputters during acceleration, stalls unexpectedly, or you hear a whining noise from the rear of the vehicle, the fuel pump is likely failing and needs replacement. Replacing the fuel pump on a 2005 Murano requires dropping the fuel tank, which is a moderately difficult job that takes a skilled DIYer 2-4 hours. The average replacement cost at a shop ranges from $473 to $854, with labor running $85-$125 and parts costing $387-$729. If you are comfortable with basic mechanical work and have the right tools, you can do this job yourself and save a significant amount of money.

How to Tell Your Fuel Pump Is Going Bad

Your 2005 Nissan Murano's fuel pump is responsible for pushing fuel from the tank to the engine at the correct pressure. When it starts to fail, you will notice these common symptoms:

1. Engine hard to start or won't start. The most obvious sign is when the engine cranks but takes a long time to fire up, or it doesn't start at all. When you turn the key to the "ON" position, you should hear a brief buzzing sound from the fuel tank area. This is the pump priming the system. If you do not hear that sound, the pump is likely not getting power or has failed completely.

2. Loss of power during acceleration. A failing fuel pump cannot keep up with the engine's demand for fuel when you step on the gas. This causes a noticeable lack of power, especially when going up hills or merging onto the highway. The vehicle may hesitate or jerk forward as the fuel delivery becomes inconsistent.

3. Engine sputtering or stalling. If the fuel pump is delivering an inconsistent flow of fuel, the engine may sputter at high speeds or stall unexpectedly while driving. Some owners report the vehicle shutting down completely with no warning, requiring a tow. This is a safety concern because it can happen in traffic.

4. Whining noise from the fuel tank. A healthy fuel pump makes a quiet hum when it primes. If you hear a loud, high-pitched whining noise coming from the rear of the vehicle near the fuel tank, that is a strong indicator the pump is wearing out and may fail soon.

5. Decreased fuel efficiency. When the fuel pump cannot maintain proper pressure, the engine has to work harder to compensate, which burns more gas than normal.

Important: Before you blame the fuel pump, check the fuel pump relay and fuse first. A blown fuse or a faulty relay can cause the same symptoms as a dead pump. The fuel pump relay is located in the fuse box under the hood. You can test it by swapping it with a known good relay of the same type. If the pump starts working, the relay was the problem. A clogged fuel filter can also mimic fuel pump failure, so replace it as part of your diagnosis.

Tools and Parts You Will Need

Before starting the job, gather the following items:

  • New fuel pump module assembly (complete assembly includes the pump, fuel level sending unit, and strainer)
  • Fuel pump retaining ring tool (a special tool to remove the plastic locking ring)
  • Floor jack and a piece of wood to support the fuel tank
  • Jack stands
  • Siphon pump and fuel-safe container for draining the tank
  • Basic socket set and wrenches
  • Fuel line disconnect tools (plastic quick-connect tools)
  • Safety glasses and mechanic gloves
  • Fire extinguisher (keep it nearby)
  • Replacement fuel filter (replace it while you are at it)

Which fuel pump to buy: For the 2005 Nissan Murano with the 3.5L V6 engine, you need a complete fuel pump module assembly. These are direct OE replacements that include the pump, sending unit, and strainer all in one unit. The OEM part numbers for this application include E8536M, P76359M, P76771M, FG1146, and FG1182. The vehicle fitment covers 2003-2007 and 2009-2014 Murano models with the 3.5L V6 engine. Replacing the complete assembly is more reliable than swapping just the pump because you get all new components.

Step-by-Step Replacement Procedure

Safety First

Always disconnect the negative battery terminal before starting any work on the fuel system. Fuel is highly flammable, and electrical sparks can ignite it. Work in a well-ventilated area with a fire extinguisher handy. Do not smoke or use any open flames near the vehicle.

Step 1: Relieve Fuel System Pressure

Locate the fuel pump fuse in the fuse box and remove it. Start the engine and let it run until it stalls from fuel starvation. This relieves the pressure in the fuel lines. Turn the ignition off and reconnect the fuse after the engine dies.

Step 2: Drain the Fuel Tank

Use a siphon pump to drain as much fuel as possible from the tank. This makes the tank much lighter and easier to handle when you drop it. Store the fuel in approved containers. Never use your mouth to siphon fuel.

Step 3: Access the Fuel Pump

On the first-generation Nissan Murano (2003-2008), you can access the fuel pump from inside the vehicle without dropping the tank. Here is how:

  • Remove the rear seat by unscrewing the securing bolts. Lift the seat cushion out of the vehicle.
  • You will see a large metal access cover on the floor pan. Remove the screws holding this cover in place.
  • Under the cover, you will find the top of the fuel pump module. Disconnect the electrical connector and the fuel lines. Use the fuel line disconnect tools to separate the quick-connect fittings.

If your vehicle does not have an access panel under the rear seat, you will need to drop the fuel tank following the steps below. Some earlier model years require tank removal, while others have the access panel. Check your specific vehicle.

Step 4: Drop the Fuel Tank (Only If Needed)

If you cannot access the pump from inside the cabin, you must drop the tank:

  • Support the fuel tank with a floor jack. Place a piece of wood between the jack and the tank to spread the weight evenly.
  • Remove the bolts or fasteners holding the fuel tank straps in place.
  • Gradually lower the tank with the jack until you can access the top of the fuel pump module.
  • Disconnect the remaining fuel lines and electrical connectors.

Step 5: Remove the Old Fuel Pump Module

Once you have access to the top of the fuel pump module:

  • Disconnect any remaining fuel lines and the electrical connector.
  • Use the fuel pump retaining ring tool to remove the plastic locking ring. Turn it counterclockwise.
  • Carefully lift the fuel pump module straight out of the tank. Be prepared for some residual fuel to spill.

Step 6: Install the New Fuel Pump Module

  • Transfer the fuel level sending unit from the old module to the new one if it does not come pre-installed. Most complete assemblies come with everything included.
  • Lubricate the new O-ring seal with a fuel-safe lubricant to ensure a proper seal.
  • Insert the new fuel pump module into the tank, making sure the seal is seated correctly.
  • Secure the retaining ring by turning it clockwise until it locks in place.

Step 7: Reassemble Everything

  • If you dropped the tank, carefully raise it back into position using the jack. Reinstall the tank straps and tighten the bolts.
  • Reconnect all fuel lines and electrical connectors. Make sure the quick-connect fittings click into place securely.
  • If you accessed the pump from inside the cabin, reinstall the metal access cover, then the rear seat.
  • Add a few gallons of fuel to the tank.
  • Reconnect the negative battery terminal.

Step 8: Test the System

  • Turn the key to the "ON" position. You should hear the new fuel pump prime for about 2-3 seconds.
  • Check all fuel line connections for leaks.
  • Start the engine and let it idle for a few minutes. Check again for any fuel leaks.
  • Take the vehicle for a short test drive to make sure the acceleration is smooth and the engine runs properly.

Common Mistakes to Avoid

1. Not replacing the fuel filter. While you have the fuel system open, replace the fuel filter. A clogged filter can put extra strain on your new pump and cause it to fail prematurely.

2. Using the wrong replacement part. Make sure you get a fuel pump module that is specifically designed for the 2005 Nissan Murano with the 3.5L V6 engine. Double-check the OE part numbers before purchasing.

3. Forgetting to lubricate the O-rings. Installing dry O-rings can cause them to twist or tear, leading to fuel leaks and vapor leaks. Always use fuel-safe lubricant.

4. Running the tank low regularly. The fuel pump relies on the fuel in the tank for cooling. Running consistently on empty or near-empty will overheat the pump and shorten its life. Try to keep at least a quarter tank of fuel at all times.

5. Skipping the pre-installation check. Before you go through the trouble of installing the new pump, verify that the issue is actually the fuel pump. Check the relay, fuse, and fuel pressure first. A professional fuel pressure test is the most reliable way to confirm a bad pump.

When to Call a Professional

Replacing the fuel pump on a 2005 Nissan Murano is not the easiest DIY job. If any of the following apply to you, consider hiring a qualified mechanic:

  • You are not comfortable working with gasoline or around electrical components.
  • You do not have the proper tools, especially the fuel pump retaining ring tool and fuel line disconnect tools.
  • You cannot safely drain and lift the fuel tank.
  • You have tried the replacement yourself and the problem persists.

Professional replacement typically costs between $473 and $854. Some shops may cut an access panel from under the rear seat to get to the pump without dropping the tank, which saves labor time.

Why Choose KEMSO Brand for Your Fuel Pump Replacement

When it comes time to replace the fuel pump on your 2005 Nissan Murano, choosing the right brand makes a difference in performance and longevity. The KEMSO brand offers high-performance fuel pump products that are designed as direct OEM replacements for a wide range of vehicles. Their fuel pumps are built to meet or exceed original equipment specifications, ensuring a perfect fit and reliable fuel delivery for your Murano.

KEMSO fuel pumps are manufactured using premium components and undergo rigorous quality testing. This means you get a product that delivers consistent fuel pressure, smooth engine performance, and long-term durability. Each KEMSO fuel pump comes with a lifetime warranty, giving you peace of mind that your investment is protected. Whether you are a DIY mechanic replacing the pump in your garage or having a professional handle the job, KEMSO provides the reliability you need to get your Murano back on the road with confidence.

You can browse the full lineup of KEMSO fuel pump products and find the right fit for your vehicle at their official website: https://www.kemsoracing.com/


Back to blog