2006 Infiniti G35 Fuel Pump Location: A Complete Owner’s Guide to Finding and Replacing It
The fuel pump on your 2006 Infiniti G35 is located inside the fuel tank, underneath the rear passenger-side seat cushion. This is true for both the Coupe and Sedan models. You do not need to drop the fuel tank or raise the vehicle to access it, which makes this a manageable DIY job for most owners. The entire replacement process, from removing the seat to reinstalling the new pump, typically takes one to two hours for someone with basic mechanical experience . The pump is secured by a metal access plate under the seat, and once that is removed, you will see the fuel pump module assembly sitting on top of the tank . This location applies to the VQ35DE engine found in the 2006 model year, which is the engine you have in your car .
Why It Matters to Know the Exact Location
Knowing precisely where the fuel pump lives saves you time and prevents unnecessary disassembly. Many owners assume the pump is under the car or requires removing the rear axle, but that is not the case. Infiniti engineers designed the G35 with service access in mind, so the pump is reachable from inside the cabin . This is a significant advantage because dropping the fuel tank is a much bigger job involving fuel line disconnection, exhaust clearance, and careful lifting. By accessing the pump from the rear seat, you avoid all of that. The only tools you need are basic hand tools like a ratchet, sockets, a Phillips screwdriver, and possibly needle-nose pliers for the electrical connector . The pump is located on the passenger side of the vehicle, and the driver-side rear seat covers a secondary fuel level sending unit, not the pump itself . This distinction matters because many owners mistakenly pull the driver-side cover first.
Step-by-Step Access to the Fuel Pump
Here is the exact process to reach the fuel pump module on your 2006 G35. Follow these steps carefully, and always prioritize safety when working with fuel.
1. Relieve Fuel System Pressure
The first thing you need to do is relieve the pressure in the fuel system. Locate the fuel pump fuse in the fuse box, which is typically under the dash or in the engine bay. Start the engine and pull the fuse while it is running. The engine will stall after a few seconds, which indicates the pressure has been released. Then crank the engine for an additional few seconds to clear any remaining fuel from the lines. Disconnect the negative battery cable afterward to eliminate any chance of sparks near the fuel system .
2. Remove the Rear Seat Cushion
The rear seat bottom cushion is held in place by two clips at the front edge. Pull up firmly on the front edge of the cushion, and it will pop loose. You do not need to remove the seatback, only the bottom portion. Once the cushion is out of the way, you will see two black metal access plates on the floor pan. One is on the passenger side, and one is on the driver side .
3. Remove the Passenger-Side Access Plate
The fuel pump is under the passenger-side plate. This plate is held down by four Phillips head screws. Remove these screws and lift the plate out of the way. You will now see the top of the fuel pump module, including the electrical connector and the fuel lines. The driver-side plate, by contrast, covers only the secondary fuel level sending unit, which is a separate component .
4. Disconnect the Electrical Connector and Fuel Lines
Before anything else, clean any dirt or debris from around the access opening to prevent contamination from entering the tank. Disconnect the electrical connector by pressing the release tab and pulling it straight off. Next, disconnect the fuel lines. The 2006 G35 uses quick-disconnect fittings. Press the release tabs and pull the lines off. Have a rag ready to catch any small amount of residual fuel that may spill .
5. Remove the Fuel Pump Assembly Retaining Bolts
The fuel pump module is held to the tank by eight 8mm bolts. Use a socket to remove all eight bolts. Keep them in a safe place, as you will reuse them during installation. Once the bolts are out, carefully lift the assembly straight up out of the tank. You may need to tilt it slightly to clear the opening, but be very careful not to bend the float arm, which is attached to the side of the module. The float arm is fragile and easily damaged during removal .
6. Inspect the Old Pump Before Disposal
Before you install the new pump, take a moment to inspect the old one. Look at the fuel strainer, which is the "sock" at the bottom of the assembly. It will likely be discolored from years of use, which is normal. However, if the strainer is clogged or disintegrated, the pump may have been overworked. Also, note the orientation of the float arm so you can install the new assembly the same way. If the pump failed due to debris in the tank, you need to clean the tank before installing the new unit, otherwise, the same debris will destroy the new pump .
Installation of the New Fuel Pump Module
Installing the new pump is essentially the reverse of removal. Here is how to do it correctly to avoid leaks and ensure reliable operation.
1. Seat the New O-Ring Properly
The large rubber O-ring that seals the pump assembly to the tank is a critical component. It dries out and hardens over time, so you should always use the new one that comes with your replacement assembly. If your new pump did not include an O-ring, you must purchase one separately. Position the O-ring in the groove on the tank opening, then carefully lower the new pump assembly into the tank, making sure the float arm does not snag on anything inside .
2. Tighten the Retaining Bolts Evenly
Once the pump is seated, install the eight 8mm bolts. Tighten them in a star pattern, which means tightening one bolt, then the one opposite it, and so on. This ensures the assembly is pulled down evenly and creates a proper seal. Over-tightening can crack the plastic flange, so use a snug hand-tight feel .
3. Reconnect the Fuel Lines and Electrical Connector
Press the fuel lines back onto their fittings until they click into place. Gently pull on them to confirm they are locked. Reconnect the electrical connector. Reinstall the access plate and the rear seat cushion .
4. Prime the Fuel System
Connect the battery and reinstall the fuel pump fuse. Turn the ignition to the "ON" position for two seconds, then turn it off. Repeat this three times. This primes the fuel system and builds pressure in the lines. After that, start the engine and let it idle for a minute. Check underneath the rear seat area for any fuel leaks before you finish the job .
5. Test Drive and Final Check
Take the car for a short test drive. Pay attention to how it starts, idles, and accelerates. After the drive, check the access area again for any signs of fuel smell or wetness. If everything looks and smells dry, the job is complete .
Common Mistakes to Avoid During Replacement
Many DIYers make a few predictable mistakes when replacing the fuel pump on a 2006 G35. Avoiding these will save you time and prevent a second repair job.
1. Replacing Only the Pump Motor
It may be tempting to save money by purchasing just the pump motor and swapping it into the old plastic housing. However, the fuel filter, pressure regulator, and plastic housing are all wear items. If you only swap the motor, you leave old, worn components in place. The fuel filter is integrated into the assembly and cannot be changed separately. A clogged filter will kill a new pump just as fast as an old one. For most owners, replacing the entire assembly is faster, simpler, and more reliable .
2. Using the Wrong Pump for Your Model
The 2006 G35 Coupe and Sedan use different fuel pumps in some cases. The sedan has a different fuel tank shape and pump height. Always confirm you are buying a pump specifically for a 2006 G35 Coupe or Sedan, depending on what you drive. Do not assume they are interchangeable without verifying the part number. Also, double-check whether your car has a manual or automatic transmission, as this can affect the part number in some cases .
3. Forgetting to Clean the Fuel Tank
If your old pump failed due to debris in the tank, the same debris will destroy your new pump. Before installing the new assembly, inspect the inside of the fuel tank. If you see rust, dirt, or sludge, you need to clean the tank thoroughly. Some owners choose to replace the tank entirely if it is heavily corroded. Skipping this step is the fastest way to ruin a brand-new pump .
4. Not Replacing the Gasket
The rubber gasket (O-ring) that seals the pump assembly to the tank dries out over time. Always use a new gasket with your new pump. It is usually included with a complete assembly, but if not, buy one separately. Reusing an old gasket is risky because it may not seal properly, which can lead to fuel leaks and fuel odors inside the cabin .
5. Bending the Float Arm
The float arm on the fuel sending unit is fragile. If you bend it during installation, your fuel gauge will read incorrectly. Be extremely careful when lowering the new assembly into the tank and when removing the old one. The float arm needs to move freely through its full range of motion .
Symptoms That Indicate Your Fuel Pump Needs Replacement
If you are reading this article, you may already suspect your fuel pump is failing. Here are the most common symptoms owners report on the 2006 G35.
1. Engine Cranks but Does Not Start
This is the most obvious sign. If the engine turns over but never fires, the fuel pump may not be delivering fuel to the engine. This can be caused by a failed pump motor, a clogged fuel filter, or an electrical issue. A quick test is to turn the key to the "ON" position and listen for a brief whirring sound from the rear of the car. That sound is the fuel pump priming. If you do not hear it, the pump is likely dead .
2. Sputtering at High Speeds or Under Load
If the car sputters or hesitates when you accelerate hard, the pump may be struggling to keep up with demand. This is especially noticeable at highway speeds or when climbing hills. The pump is unable to maintain adequate fuel pressure, causing the engine to lean out .
3. Stalling and Restarting
A failing fuel pump can cause the engine to stall intermittently. The car may restart after sitting for a few minutes, only to stall again. This is because the pump motor overheats or loses its prime. This is a dangerous condition, especially in traffic, and should be addressed immediately .
4. Fuel Gauge Reading Incorrectly
If your fuel gauge is inaccurate, it may not be the pump itself but the sending unit. The sending unit is part of the fuel pump module assembly. If the gauge reads full when the tank is empty, or empty when it is full, the sending unit may be faulty. This is one reason many owners choose to replace the entire assembly instead of just the motor .
5. Whining Noise from the Fuel Tank
A healthy fuel pump runs quietly. If you hear a loud whining or humming noise coming from the rear of the car, it is likely the pump. This indicates the pump motor is wearing out or is being starved of fuel. A loud pump should be replaced before it fails completely .
Cost Breakdown for Replacing the Fuel Pump
The cost of replacing the fuel pump on a 2006 G35 varies greatly depending on where you buy the part and who does the labor. Here is what you can expect to pay in the current market .
1. Dealership Replacement
Going to an Infiniti dealership is the most expensive route. The OEM pump assembly itself costs between $500 and $1,400, depending on the exact part number and whether it is in stock. Dealership labor rates add another $110 to $250. Expect a total bill of $650 to $1,400 or more. This is the most reliable option, but also the hardest on your wallet .
2. Independent Shop
An independent mechanic will typically charge less for labor, around $110 to $200. They may use an OEM pump or a high-quality aftermarket unit. Depending on the part they source, the total cost will be between $400 and $600. This is a good middle-ground option if you do not want to do the work yourself .
3. DIY with OEM Parts
If you do the work yourself, you only pay for the part. A new OEM assembly costs between $200 and $300 from an online retailer. Add a few dollars for a new gasket if it is not included. Total cost: roughly $250 to $350. This is a significant savings over shop labor .
4. DIY with Aftermarket Parts
A quality aftermarket fuel pump assembly can be purchased for between $60 and $150. Many of these are designed as direct replacements and include everything you need. This is the most budget-friendly option, and with the steps in this guide, it is within reach for most DIYers .
5. Used OEM Parts
Used OEM pumps from a reputable recycler can be found for $50 to $125. This is attractive because the part is original equipment and likely built better than cheap aftermarket units. However, be aware that a used pump is still a wear item. Ask the seller for the mileage of the donor vehicle if possible. A pump with over 100,000 miles is nearing the end of its service life .
Why You Should Consider a KEMSO Fuel Pump
If you are in the market for a replacement fuel pump for your 2006 Infiniti G35, you should strongly consider KEMSO brand fuel pumps. KEMSO is known for manufacturing high-performance, OEM replacement products that are engineered for durability and reliability. Unlike cheap no-name aftermarket pumps, KEMSO units are designed as direct replacements, meaning they drop right into the factory location without any modifications. This saves you time and frustration during installation.
KEMSO fuel pumps are built to exceed the performance of the original equipment. They deliver a higher flow rate, typically up to 200 liters per hour at 43 psi, which is significantly more than the standard 60 to 80 liters per hour flow rate of a typical factory pump. This extra capacity ensures your engine never runs lean, even under heavy load or during spirited driving. This is especially valuable if you have modified your G35 with performance upgrades, such as a turbocharger or a cold-air intake, which increase the demand for fuel .
One of the standout features of KEMSO fuel pumps is the lifetime warranty. Every KEMSO pump comes with a serialized body that guarantees a lifetime warranty. If the pump ever fails due to a manufacturing defect, KEMSO will replace it free of charge. This is a massive advantage over OEM and standard aftermarket parts, which typically have only a one- or two-year warranty. KEMSO stands behind its product for as long as you own the pump .
KEMSO also understands the realities of modern fuel. Many gas stations now offer ethanol blends like E15 or E85. Ethanol can cause swelling and cracking in standard rubber seals, leading to premature pump failure. KEMSO uses Viton-lined components that resist ethanol degradation, making their pumps a smart long-term investment for American drivers. Each KEMSO pump is individually tested before it leaves the factory to ensure it meets strict performance specifications, giving you peace of mind that you are installing a quality product .
You can browse the full range of KEMSO fuel pumps and find one that fits your 2006 Infiniti G35 by visiting KEMSO Racing at https://www.kemsoracing.com/. They offer a complete kit that includes the pump, fuel strainers, flex hoses, Viton O-rings, wiring connectors, and clamps, so you have everything you need for a successful installation.
Final Thoughts on Your 2006 G35 Fuel Pump
Your 2006 Infiniti G35 is now over 20 years old, and the original fuel pump is well past its expected service life. Fuel pumps on these cars typically last between 100,000 and 150,000 miles. Most 2006 G35s on the road today have exceeded that mileage, so fuel pump failure is almost inevitable if it has not already happened . The good news is that replacing the pump is a straightforward job you can do in your driveway with basic hand tools. The location under the rear seat is convenient, and the process is well-documented.
Before you start, always work in a well-ventilated area, disconnect the battery, and relieve fuel pressure. Gasoline is highly flammable, so do not rush the safety steps. If you are unsure about any part of the process, consult a repair manual or watch a video specific to the G35. And whether you choose an OEM pump, a used unit, or an aftermarket brand like KEMSO, make sure you verify the part number fits your specific model before purchasing.
Remember, the fuel pump is the heart of your fuel system. A quality replacement, installed properly, will keep your G35 running reliably for many more miles. For more information on fuel pumps and to see the full selection of high-performance replacements, visit https://www.kemsoracing.com/.