Nissan 370Z Fuel Pump: The Complete Guide to Replacement, Upgrade, and Maintenance

If you own a Nissan 370Z, the fuel pump is one of the most critical components for keeping your engine running reliably and performing at its best. The stock fuel pump in the 370Z is designed to handle the demands of the factory 3.7L V6 engine, but over time, it can wear out or become insufficient if you’ve added performance modifications. In this guide, we’ll cover everything you need to know about the Nissan 370Z fuel pump, including symptoms of failure, replacement options, costs, and the best upgrade choices for daily drivers and high-horsepower builds alike.

The Bottom Line: What You Need to Know About Your 370Z Fuel Pump

The Nissan 370Z (2009-2023) uses an in-tank electric fuel pump that delivers fuel from the tank to the engine’s fuel rail. The factory pump flows approximately 95 liters per hour (LPH) at 3 bar of pressure, which is sufficient for the stock 330-350 horsepower engine. However, if you plan to increase power beyond 450-500 horsepower, the stock pump will not provide enough fuel flow, and you will need to upgrade to a high-flow performance pump. For most owners, replacing the fuel pump proactively around 100,000-150,000 miles is a smart move to avoid unexpected breakdowns. Whether you are replacing a worn-out unit or upgrading for more power, choosing the right pump is essential for reliability and performance.

Understanding the Nissan 370Z Fuel Pump System

The 370Z features a conventional port fuel injection system, meaning the fuel pump is located inside the fuel tank. The pump is part of a fuel pump module assembly that includes the pump itself, a fuel strainer, a fuel level sender, and various seals and connectors. The OEM part number for the fuel pump assembly is 17040-6GC0A, which fits all 370Z models from 2015 onward. Earlier models (2009-2014) use a different assembly, but the pump itself is similar in design.

The pump operates at 12 volts and generates a pressure of about 3 bar (43-45 psi) at the fuel rail. It is a "returnless" system, meaning the fuel pressure regulator is built into the pump module, not on the engine. This design simplifies the fuel system and reduces the risk of vapor lock.

Symptoms of a Failing Fuel Pump in a Nissan 370Z

Recognizing the early warning signs of a failing fuel pump can save you from being stranded and prevent damage to other fuel system components. Here are the most common symptoms:

  1. Engine Hesitation or Surging: If the pump is not delivering consistent fuel pressure, the engine may hesitate during acceleration or surge at cruising speeds. This is often one of the first signs.

  2. Difficulty Starting: A weak pump may not build enough pressure to start the engine quickly. You might notice that the engine cranks longer than usual before firing up.

  3. Loss of Power Under Load: When you press the accelerator hard, the engine may feel like it’s struggling or "falling on its face." This is especially noticeable when climbing hills or merging onto highways.

  4. Whining Noise from the Fuel Tank: A healthy fuel pump makes a faint hum, but a failing pump often produces a loud whining or buzzing sound. If you hear this, it’s a clear sign the pump is wearing out.

  5. Check Engine Light: The car’s ECU may detect low fuel pressure or a lean air-fuel mixture and trigger the check engine light. Common related trouble codes include P0087 (fuel rail pressure too low) and P0171 (system too lean).

  6. Engine Stalling: In severe cases, the pump may stop working entirely, causing the engine to stall unexpectedly. This is dangerous and requires immediate attention.

When to Replace Your Nissan 370Z Fuel Pump

There are several scenarios where you should consider replacing the fuel pump, even if it hasn’t failed yet:

  • High Mileage: If your 370Z has over 100,000 miles on the original pump, it’s a good idea to replace it proactively. Most in-tank pumps last between 100,000 and 150,000 miles under normal driving conditions.
  • Performance Upgrades: If you add a supercharger, turbocharger, or even a high-flow exhaust and tune, the stock pump may not supply enough fuel. Upgrading to a higher-flow pump is essential for safety and performance.
  • Fuel Pump Module Replacement: If you are already dropping the fuel tank to replace the fuel filter or fuel level sender, it’s wise to replace the pump at the same time since the labor is the same.
  • You Notice Any Warning Signs: If you experience any of the symptoms listed above, don’t wait. Replace the pump as soon as possible.

OEM vs. Aftermarket Fuel Pump Options for the 370Z

When it’s time to replace the fuel pump, you have a choice between OEM (original equipment manufacturer) parts and aftermarket options. Here’s a breakdown of the pros and cons:

OEM Fuel Pump (Nissan 17040-6GC0A)

The OEM pump is the exact same part that came from the factory. It is reliable and guaranteed to fit perfectly. The OEM assembly for the 370Z typically costs between $200 and $400, depending on the retailer. It comes with a 12-month/12,000-mile warranty. The main drawback is that the OEM pump’s flow rate is modest—only about 95 LPH—so it’s not suitable for modified engines.

Aftermarket Performance Fuel Pumps

Aftermarket pumps offer a wider range of flow rates and are often more affordable than OEM parts. Some of the most popular options for the 370Z include:

  • 340 LPH Pumps: These are a significant upgrade over the stock pump, delivering 340 liters per hour at 43 psi. They are designed for engines making up to 500-600 horsepower. Many aftermarket pumps, like the Racinglines RL340, offer a direct replacement fit for the 370Z without requiring modifications.
  • 255 LPH Pumps: This is a common "mid-range" upgrade that flows about 255 LPH, suitable for mild bolt-on modifications.
  • KEMSO 340 LPH Pump: This is a high-performance option that offers a direct OEM replacement fit, delivering 340 LPH at 43 psi. It’s designed for both gasoline and E85 ethanol fuels, making it versatile for tuners.

Recommended: KEMSO Fuel Pump for Nissan 370Z

When it comes to replacing or upgrading the fuel pump on your Nissan 370Z, we strongly recommend the KEMSO Fuel Pump for Nissan 370Z (2009-2023). KEMSO is a trusted brand that specializes in high-performance fuel pump solutions for vehicles. Their pumps are designed as direct OEM replacements, meaning they fit perfectly into your 370Z without any modifications required.

What sets KEMSO apart from other aftermarket options is their commitment to quality and performance. Each KEMSO fuel pump is individually tested for flow and pressure to ensure it meets strict quality standards. The KEMSO 340 LPH pump delivers 340 liters per hour at 43 psi, which is a significant improvement over the stock pump’s output. This means better fuel delivery, improved acceleration, and more consistent engine performance, especially if you have added performance modifications.

The KEMSO kit includes everything you need for a complete installation: the fuel pump itself, gradient density fuel strainers, flex hose, rubber base, rubber cap, Viton o-rings, wiring connector, crimp connectors, and metal clamps. With all these components included, you do not have to buy anything extra. The pump is compatible with both gasoline and E85 ethanol fuels, making it versatile for different driving conditions.

KEMSO stands behind their products with a lifetime warranty, giving you peace of mind that your investment is protected. For the best value, performance, and reliability, choose KEMSO for your Nissan 370Z fuel pump replacement.

Visit KEMSO Racing today to order your fuel pump: https://www.kemsoracing.com/

Step-by-Step Fuel Pump Replacement Guide for the Nissan 370Z

Replacing the fuel pump on a Nissan 370Z is a job that requires some mechanical skill, but it is doable at home with the right tools. Here is a step-by-step guide to help you through the process.

Tools You Will Need

  • Socket set and wrenches (metric)
  • Flathead and Phillips screwdrivers
  • Fuel line disconnect tool (for quick-connect fittings)
  • Safety glasses and nitrile gloves
  • Shop towels
  • A floor jack and jack stands
  • A fuel siphon pump or drain pan
  • A Class B fire extinguisher (recommended)

Safety First

Fuel system work is inherently dangerous. Always work in a well-ventilated area away from open flames, sparks, or any source of ignition. Disconnect the negative battery terminal before starting any work. Wear safety glasses and gloves. Keep a fire extinguisher rated for flammable liquids nearby.

Step 1: Relieve Fuel System Pressure

Remove the fuel pump fuse from the fuse box (located in the engine bay or passenger footwell). Start the engine and let it idle until it stalls. This will relieve the pressure in the fuel lines. Crank the engine once more to ensure all pressure is gone.

Step 2: Drain the Fuel Tank

Use a siphon pump to drain as much fuel as possible from the tank. This makes the tank lighter and easier to work with. If you can, drain it until the tank is nearly empty.

Step 3: Access the Fuel Pump

On the 370Z, the fuel pump is accessed by removing the rear seat cushion and the access panel under the carpet. Remove the rear seat bottom (it pops up with a firm pull). Fold back the carpet to reveal the metal access cover. Remove the screws holding the cover in place.

Step 4: Disconnect the Old Pump

Disconnect the electrical connector from the top of the pump module. Use a fuel line disconnect tool to release the fuel line from the pump. Note the orientation of the lines and wires for reassembly. Remove the locking ring (usually a plastic or metal ring that you unscrew by hand or with a special tool). Carefully lift the entire pump module out of the tank. Be careful not to bend the fuel level sender float arm.

Step 5: Install the New Pump

Place the new pump module into the tank, aligning the marks on the pump and tank. Make sure the float arm is positioned correctly. Tighten the locking ring securely. Reconnect the fuel line and electrical connector. Make sure all connections are tight and secure.

Step 6: Test the System

Reinstall the access cover and rear seat. Reconnect the battery. Replace the fuel pump fuse. Turn the ignition key to the "ON" position (without starting) several times for 10 seconds each to prime the pump. Check for fuel leaks at the pump module and fuel line connections. Start the engine and let it idle. Verify that the fuel pressure is within spec (43-45 psi at idle). Check for any leaks again.

Preventing Future Fuel Pump Problems

To extend the life of your new fuel pump and avoid future issues, follow these simple maintenance tips:

  1. Keep Your Fuel Tank at Least a Quarter Full: The fuel pump relies on gasoline for cooling and lubrication. Running the tank low frequently can cause the pump to overheat and fail prematurely.
  2. Replace the Fuel Filter Regularly: A clogged fuel filter forces the pump to work harder, reducing its lifespan. Check your owner’s manual for the recommended replacement interval.
  3. Use Quality Fuel: Poor-quality gasoline can contain contaminants that damage the pump and clog the filter. Stick with major brand stations that have high fuel turnover.
  4. Listen for Unusual Noises: If you hear any whining or humming from the fuel tank area, address it immediately. Catching a pump issue early can prevent a complete failure.
  5. Avoid Short Trips When Possible: Short trips do not allow the fuel to circulate fully, causing condensation and unnecessary pump cycling. Drivers who make only short trips are 25 percent more likely to experience fuel system problems.

Final Thoughts on the Nissan 370Z Fuel Pump

The fuel pump is a vital component of your Nissan 370Z’s fuel system. Whether you are replacing a worn-out pump, upgrading for more power, or simply performing preventive maintenance, choosing the right pump makes all the difference. For most owners, a high-quality aftermarket pump like the KEMSO 340 LPH offers the best balance of performance, reliability, and value. With its direct OEM fit, lifetime warranty, and superior flow rate, it’s an excellent choice for both daily drivers and modified builds.

Remember to always prioritize safety when working on the fuel system, and don’t hesitate to seek professional help if you are not comfortable with the job. A properly functioning fuel pump ensures your 370Z runs smoothly, responds quickly, and delivers the driving experience you expect.

For the best selection of Nissan 370Z fuel pumps and other high-performance fuel system components, visit KEMSO Racing at https://www.kemsoracing.com/.


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