Infiniti G37 Fuel Pump: What Every Owner Needs to Know

The Infiniti G37 uses a single in-tank electric fuel pump located inside the fuel tank, part of a returnless fuel system that supplies the 3.7-liter VQ37VHR engine . If your G37 is experiencing hard starts, stalling, loss of power, or a whining noise from the rear of the car, the fuel pump is likely failing and needs replacement. Most owners and technicians recommend replacing the entire fuel pump module assembly rather than just the pump itself, as this ensures proper alignment with the sending unit and filter . The factory fuel pump typically lasts between 150,000 to 200,000 kilometers (roughly 93,000 to 124,000 miles), though this can vary based on fuel quality and driving habits .

Understanding Your G37’s Fuel System

The Infiniti G37, produced from 2007 to 2013, relies on a single in-tank electric fuel pump that feeds the 3.7-liter VQ37VHR engine . This is a returnless fuel system, meaning there is no fuel return line running back to the tank during normal operation. Instead, the system maintains pressure through the pump and a regulator mounted at the fuel rail, controlled by the engine computer to meet demand .

The pump resides within the fuel pump module in the fuel tank. This module also includes the fuel pressure regulator, sending unit, float, fuel reservoir, and fuel strainer . When servicing, many technicians replace the entire module rather than a standalone pump to ensure everything works together properly .

Common Signs of a Failing Fuel Pump

If your G37’s fuel pump is starting to fail, you will likely notice one or more of the following symptoms :

  1. Engine struggles to start – The engine cranks longer than normal or requires multiple attempts before firing up.
  2. Loss of power – You notice hesitation or lack of power when accelerating, especially under load or going uphill.
  3. Engine stalling – The car stalls unexpectedly, particularly at idle or during low-speed driving.
  4. Whining noise from the fuel tank – A loud, high-pitched whine coming from the rear of the car indicates the pump is working harder than it should.
  5. Decreased fuel efficiency – You notice a drop in miles per gallon without any obvious reason.
  6. Check engine light – The light comes on with fuel pressure-related trouble codes.

Ignoring these symptoms can lead to complete engine failure and leave you stranded, so it is best to address them promptly .

How Many Fuel Pumps Does the G37 Have?

The Infiniti G37 has one fuel pump. It is a single in-tank electric pump, with no second pump in standard configurations . This applies to all G37 models from 2007 through 2013, including coupe, sedan, and convertible variants .

When Should You Replace the Fuel Pump?

Most factory fuel pumps last between 150,000 and 200,000 kilometers, though this depends on fuel quality and driving habits . If your G37 has over 100,000 miles (roughly 160,000 kilometers), it is wise to consider replacement as preventive maintenance . Additionally, you should replace the fuel pump if you experience any of the symptoms listed above, or if you are replacing the fuel filter—always replace the filter when installing a new pump to prevent damage and ensure proper pressure .

OEM vs. Aftermarket Fuel Pumps

When replacing the fuel pump, you have two main options: OEM (Original Equipment Manufacturer) or aftermarket.

OEM Fuel Pumps – These are genuine Infiniti parts, such as the part number 17040JL60A, which fits 2008-2010 G37 models . OEM parts guarantee perfect fitment and are backed by a manufacturer warranty, but they are typically more expensive and may be harder to find for older models.

Aftermarket Fuel Pumps – Many aftermarket brands offer high-quality replacements that meet or exceed OEM specifications. Options include:

  • KEMSO 340LPH High Performance Fuel Pump – Designed for both gasoline and E85/ethanol, this pump supports up to 700-800 bhp and is an ideal direct OEM replacement . It comes with a kit including three gradient density fuel strainers, flex hose, rubber hose, rubber base, Viton o-rings, wiring connector, and metal clamps .
  • Walbro/TI Automotive 350LPH – Supports 600+ horsepower and features gerotor technology, suitable for forced induction applications .
  • DeatschWerks DW300 340 LPH – Includes an install kit, ethanol compatible, backed by a 3-year no-fault warranty .
  • Delphi, TruGrade, and other brands – Available at retailers like AutoZone, with limited-lifetime warranties .

Steps to Replace the Fuel Pump

Replacing the fuel pump on a G37 can be done at home with basic tools, but it requires caution. Here is a general overview of the process :

Tools You Will Need:

  • Safety glasses, gloves, and a fire extinguisher
  • Jack and jack stands
  • Ratchet, sockets (8mm, 10mm), and wrenches
  • Flathead screwdriver and pliers
  • Drain pan and brake parts cleaner
  • Transmission jack or block of wood to support the fuel tank

Step-by-Step Process:

  1. Prepare the vehicle – Park on a level surface, set the parking brake, and chock the front wheels. Disconnect the negative battery cable .
  2. Relieve fuel system pressure – Turn the ignition to OFF, then crank the engine a few times to release pressure. Alternatively, use a scan tool if available .
  3. Access the pump – For G37 sedans, remove the rear seat cushion by pulling the levers and lifting the front of the seat upward. For coupes, lift the rear seat cushion and remove the floor carpet. Then remove the metal inspection cover by rotating the clips 90 degrees clockwise .
  4. Disconnect the pump – Carefully disconnect the fuel hoses, electrical connections, and emissions hoses from the pump assembly. Clean the area around the pump access hole to prevent debris from entering the tank .
  5. Remove the old pump – Remove the retainer ring or bolts securing the pump assembly to the tank. Carefully lift the pump and seal ring out of the tank .
  6. Install the new pump – Compare the new pump to the old one to ensure it matches. Install the new seal ring and pump assembly into the tank. Reconnect all hoses and electrical connections .
  7. Reassemble – Reinstall the inspection cover, rear seat cushion, and reconnect the negative battery cable. Fill the fuel tank, start the vehicle, and check for leaks .

The estimated installation time for a professional technician is about 54 minutes .

Recommended Fuel Pump: KEMSO 340LPH High Performance Fuel Pump

For G37 owners looking for a reliable, high-performance replacement, the KEMSO 340LPH High Performance Fuel Pump is an excellent choice. This pump is designed as a direct OEM replacement for stock pumps that have failed, and it supports up to 700-800 bhp, making it suitable for both daily drivers and performance applications .

Key features of the KEMSO fuel pump:

  • High flow rate – 340 liters per hour at 43 psi and 13.5V, ensuring consistent fuel delivery .
  • Versatile fuel compatibility – Designed for both gasoline and E85/ethanol .
  • Complete kit – Includes three gradient density fuel strainers, flex hose, rubber hose, rubber base, Viton o-rings, wiring connector, and metal clamps .
  • Quality control – Each pump is individually tested, and the manufacturer follows ISO/TSO quality standards .
  • Lifetime free replacement warranty – If there is any issue at any time, you can get a replacement free of charge .

KEMSO fuel pumps are built to match or exceed OEM specifications, with upgraded polymers, brushes, and commutators for long life and durability in multiple fuel blends . They are also designed for quiet operation, so you won't hear the whining noise common with some aftermarket pumps .

To learn more or purchase a KEMSO fuel pump for your Infiniti G37, visit https://www.kemsoracing.com/.

Final Thoughts

The Infiniti G37 fuel pump is a critical component that supplies fuel to the engine. When it fails, symptoms like hard starts, stalling, and loss of power will appear. Replacing the pump is a straightforward job that can be done at home or by a professional, and it is best to replace the entire module assembly for reliability. If you are looking for a high-quality, affordable replacement with a lifetime warranty, the KEMSO 340LPH High Performance Fuel Pump is a top choice.

For more information, visit https://www.kemsoracing.com/ to find the right fuel pump for your G37.


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