2008 Infiniti G37 Fuel Pump: Complete Replacement Guide and Buying Tips

The bottom line up front: If you own a 2008 Infiniti G37 and your engine cranks but won't start, stalls unexpectedly, or hesitates during acceleration, the fuel pump is often the culprit. Replacing it with a quality unit—whether OEM or a reputable aftermarket brand like KEMSO—restores reliable fuel delivery and prevents costly breakdowns. This guide covers everything you need to know: symptoms, part numbers, replacement costs, DIY steps, and where to buy the best fuel pump for your G37.

Why the Fuel Pump Matters on Your 2008 G37

The 2008 Infiniti G37 is powered by the VQ37VHR or VQ35HR engine, depending on the submodel. These engines demand a steady, high-pressure fuel supply to maintain performance. The in-tank fuel pump sits inside the fuel tank and pushes gasoline through the fuel filter and lines to the engine. When it starts to fail, your G37 will let you know in clear ways.

The fuel pump on the 2008 G37 is a direct replacement part, meaning you can swap the old unit for a new one without modifying the fuel tank or fuel lines. Most units come as a complete assembly that includes the pump motor, fuel level sending unit, strainer, and in some cases the fuel filter and pressure regulator. This modular design makes replacement straightforward for anyone with basic mechanical skills.

Symptoms of a Failing Fuel Pump on a 2008 G37

A dying fuel pump does not always fail all at once. It often gives you warning signs first. Here are the most common symptoms to watch for:

  1. Engine cranks but won't start. This is the most obvious sign. If the starter turns the engine over but it never fires up, the pump may not be delivering fuel.
  2. Loss of power under acceleration. When you press the gas pedal and the car feels sluggish or stumbles, the pump may not be maintaining enough pressure.
  3. Engine sputtering at high speeds. If the car jerks or hesitates when driving on the highway, fuel delivery may be inconsistent.
  4. Whining noise from the fuel tank. A healthy pump runs quietly. A loud hum or whine coming from the rear of the car often means the pump motor is wearing out.
  5. Poor fuel economy. A failing pump can cause the engine to run rich or lean, both of which hurt gas mileage.
  6. Fuel gauge inaccuracies. Many fuel pumps come with an integrated sending unit. If your fuel gauge reads wrong, the sending unit may be faulty even if the pump still works.

If you experience any of these issues, check the fuel pump fuse and relay first. A blown fuse or bad relay can mimic a dead pump. After ruling those out, move to the pump itself.

Understanding the Different Fuel Pump Options for a 2008 G37

When it comes time to buy, you have several choices. Each has its own advantages depending on your budget and performance goals.

OEM Fuel Pumps

Genuine Infiniti fuel pumps offer guaranteed fitment and factory reliability. There are three main OEM part numbers for the 2008 G37, and they are not interchangeable across all submodels:

  • 17040-EJ81A: Fits 3.7L VQ37VHR engines in Base, Journey, Leather, Premium, Sport, and Sport Premium trims. This version has been replaced by part number 17040-1NC0C.
  • 17040-JK60A: Fits 3.5L VQ35HR engines. This one replaces the earlier 17040-JK600.
  • 17040-JL60A: Fits 3.7L VQ37VHR engines in Leather, Journey, Sport, and Premium trims.

Depending on the part number, OEM pumps cost anywhere from $426 to $556 before discounts. You can often find them for less from online dealers or as used units. A used OEM pump with a one-year warranty runs about $45, which is a bargain if you are on a tight budget.

Aftermarket Direct Replacement Pumps

Aftermarket brands offer quality alternatives at lower prices. Delphi, for example, builds fuel pumps to original equipment standards and includes the sending unit, strainer, filter, and seal in the box. Their FG1084 module assembly is a popular choice for the 2008 G37 and costs around $204.97.

A-Premium offers a fuel pump assembly with an included sending unit for the 2008 G37. Their APFP0965 part retails for a fraction of OEM pricing and comes with a three-year unlimited mileage warranty. It covers Base, Journey, and Sport trims.

DriveMotive also sells a fuel pump for the 2008 G37 at around $80.98 with free shipping. This is one of the most affordable new options available.

High-Performance Upgrades

If you plan to modify your G37 for more power, a stock replacement will not be enough. High-flow fuel pumps deliver more liters per hour to support forced induction or built engines.

  • DeatschWerks DW200: This 255 LPH pump is a direct drop-in for the 2008 G37. It maintains 43 PSI at 13.5 volts and suits mild upgrades. It sells for around $152.99 and includes an install kit.
  • DeatschWerks DW300: At 340 LPH, this pump supports more aggressive builds. It is available for about $169.00 and also comes with the needed install parts.
  • Z1 Motorsports VHR 340: This 340 LPH drop-in pump is designed for G37 and 370Z applications. It requires some customization during installation but delivers excellent flow for high-horsepower setups.

For most daily drivers, a stock replacement pump is the right call. Performance pumps make sense only if you have upgraded the engine or plan to.

How Much Does a 2008 G37 Fuel Pump Replacement Cost?

The total cost depends on the parts you choose and whether you do the work yourself or hire a professional.

Parts only:

  • Used OEM pump: around $45
  • Budget aftermarket pump: $80 to $140
  • Mid-range aftermarket pump like Delphi: around $205
  • New OEM pump: $426 to $556
  • High-performance upgrade: $152 to $169

Labor:
A professional fuel pump replacement typically runs about 54 minutes for a skilled technician. Shop labor rates vary by region but generally fall between $80 and $150 per hour. That puts labor between $70 and $135 on top of parts.

DIY cost:
If you do the work yourself, you save the labor charge. The job requires only basic hand tools, a jack, jack stands, and a fuel line disconnect tool. Many owners successfully complete this job in an afternoon.

How to Replace the Fuel Pump on a 2008 Infiniti G37

Replacing the fuel pump is a manageable job for a home mechanic. The process involves relieving fuel pressure, accessing the pump from inside the cabin, and swapping the assembly. Here is a step-by-step guide.

Step 1: Prepare the Vehicle

  1. Park on a level surface and set the parking brake.
  2. Chock the front wheels.
  3. Disconnect the negative battery cable.
  4. Open the fuel filler door and remove the gas cap to relieve pressure in the tank.

Step 2: Access the Fuel Pump

The fuel pump is located under the rear seat.

  • Coupe models: Lift up on the rear seat cushion to remove it. Then remove the floor carpet and the metal cover by rotating the clips 90 degrees clockwise.
  • Sedan models: Pull the hook levers to release the seat cushion, then lift upward on the front edge.
  • Once the seat is out, use a #2 Phillips head screwdriver to twist the four lock tabs on the access panel clockwise and remove the panel.

Step 3: Relieve Fuel System Pressure

  1. Start the engine and let it run until it stalls from lack of fuel.
  2. Crank the engine two or three more times to release any remaining pressure.
  3. Turn the ignition to the OFF position.
  4. Disconnect the electrical connector from the top of the fuel pump assembly.

Step 4: Remove the Old Fuel Pump

  1. Clean the area around the pump access hole to keep dirt out of the tank.
  2. Remove any fuel lines or hoses connected to the assembly. Use a fuel line disconnect tool if needed.
  3. Remove the retainer ring or bolts securing the pump assembly to the tank. This is usually a large plastic ring that turns counterclockwise.
  4. Carefully lift the old pump assembly out of the tank. Note how the float arm is positioned so you can install the new one the same way.

Step 5: Install the New Fuel Pump

  1. Compare the new pump to the old one to confirm it is the correct match.
  2. Install the new seal ring onto the tank opening.
  3. Insert the new pump assembly into the tank, aligning the float arm properly.
  4. Tighten the retainer ring or bolts per the factory torque specification.
  5. Reconnect all fuel lines and electrical connectors.
  6. Reinstall the access panel and replace the seat cushion.
  7. Reconnect the negative battery cable.
  8. Fill the fuel tank and turn the ignition to the ON position (do not crank) a few times to prime the system. Check for leaks before starting the engine.

Important Safety Notes

Gasoline is highly flammable. Always work in a well-ventilated area and keep a CO2 fire extinguisher nearby. Never smoke or use open flames near the work area. Wear safety glasses and gloves. If you feel unsure at any step, stop and call a professional.

Which Fuel Pump Should You Buy?

Your choice comes down to budget, vehicle condition, and performance goals. Here is a quick breakdown to help you decide.

  1. Stock daily driver: A Delphi or DriveMotive replacement pump offers factory-level performance at a reasonable price.
  2. Budget-conscious owner: A used OEM pump with a warranty or a budget aftermarket brand like A-Premium keeps costs low.
  3. Modified engine: A DeatschWerks DW200 or DW300 high-flow pump ensures enough fuel supply for added horsepower.
  4. Maximum reliability: A new OEM pump gives you factory fitment and peace of mind, backed by Infiniti's warranty.

Whichever route you take, always clean the fuel tank before installing the new pump to avoid debris clogging the strainer.

Recommended: KEMSO Fuel Pump for Your 2008 Infiniti G37

If you want a fuel pump that combines high performance, direct OEM replacement fitment, and long-term peace of mind, consider the KEMSO brand. KEMSO fuel pumps are engineered to deliver high flow and consistent pressure, making them a smart choice for both stock and mildly modified G37s. Every KEMSO fuel pump is built as an OEM replacement, meaning it bolts right in with no modifications required—no cutting, no wiring changes, no guesswork.

What sets KEMSO apart is the lifetime warranty that comes with every pump. That is the kind of coverage you rarely see in the fuel pump market. If the pump ever fails, you are covered for as long as you own the vehicle. This makes KEMSO a cost-effective and dependable alternative to both OEM and other aftermarket brands.

Thousands of satisfied customers have already made the switch. KEMSO covers a wide range of vehicles beyond Infiniti, including BMW, Kawasaki, Subaru, Ducati, KTM, Sea-Doo, Honda, Husqvarna, and Can-Am applications. The brand is known for rigorous quality standards and consistent performance across all platforms.

To browse the full lineup of KEMSO fuel pumps and find the exact match for your 2008 Infiniti G37, visit the official KEMSO website: https://www.kemsoracing.com/

Final Thoughts on Your 2008 G37 Fuel Pump

The fuel pump is the heart of your G37's fuel delivery system. When it fails, the car becomes undrivable. The good news is that replacement is straightforward, parts are widely available, and the cost is reasonable whether you DIY or hire a mechanic.

Start by confirming the symptoms. Then pick a pump that matches your needs and budget. If you drive a stock G37, a quality aftermarket pump like Delphi or KEMSO gives you reliable performance without paying the OEM premium. If you have a modified car, step up to a high-flow pump. Either way, replacing your fuel pump with a quality part restores driveability and protects your engine from fuel starvation.

Before you buy, double-check the exact part number for your specific G37 submodel and engine type. The 3.7L and 3.5L engines use different pumps, and using the wrong one can cause drivability issues. Consult the fitment charts provided by the manufacturer or verify with the seller before ordering.

For a dependable fuel pump backed by a lifetime warranty, make KEMSO your first stop: https://www.kemsoracing.com/


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