2004 Infiniti G35 Fuel Pump: Complete Replacement Guide, Symptoms, and Best Options
If you own a 2004 Infiniti G35 and are experiencing starting issues, stalling, or a whining noise from the rear of your vehicle, the fuel pump is likely failing. The best course of action is to replace the fuel pump as soon as possible to avoid being stranded. The 2004 G35 fuel pump is located in the fuel tank under the rear seat on the passenger side, and replacement costs range from $90 for a basic pump to over $1,400 for a professional shop job. For a reliable, high-performance option with lifetime warranty, KEMSO brand offers OEM replacement fuel pumps that are an excellent choice for your G35.
Signs Your 2004 Infiniti G35 Fuel Pump Is Failing
Your fuel pump is the heart of your vehicle's fuel system. When it starts to fail, you will notice several warning signs:
1. Engine sputtering at high speeds. If the engine stutters or hesitates when you accelerate, especially on the highway, the fuel pump may not be delivering enough fuel to keep up with demand.
2. Loss of power during acceleration. Difficulty climbing hills or passing other vehicles is a common symptom of a failing fuel pump.
3. Vehicle stalls or won't start. A faulty fuel pump can prevent fuel from reaching the engine, causing the car to stall or refuse to start altogether.
4. Whining noise from the fuel tank area. A high-pitched whine coming from under the rear seat on the passenger side indicates a worn-out pump that is about to fail.
5. Check engine light comes on. Common trouble codes include P0462 and P0463, which relate to fuel level sensor circuit issues.
Where Is the Fuel Pump Located on a 2004 Infiniti G35?
The 2004 Infiniti G35 has two fuel pumps: a main fuel pump and a sub-pump. The main fuel pump is located in the fuel tank under the rear seat on the passenger side. The sub-pump is on the other side of the tank and transfers fuel from one side to the main pump side. To access the main pump, you need to remove the rear seat cushion. For the coupe, you have to remove the rear seat cushion to access the fuel tank.
How Much Does a 2004 Infiniti G35 Fuel Pump Replacement Cost?
The cost varies significantly depending on whether you do it yourself or hire a professional:
- DIY parts cost: You can purchase a new fuel pump from AutoZone for $90 to $305, depending on the part grade and warranty coverage. Aftermarket fuel pump assemblies typically cost between $80 and $150.
- Professional replacement cost: RepairPal estimates the average cost between $1,425 and $1,479 for a professional fuel pump replacement. This includes labor, which is substantial because of the work involved in accessing the fuel tank.
Best Fuel Pump Replacement Options for 2004 Infiniti G35
When choosing a replacement fuel pump, you want something that is reliable, durable, and fits properly. Here are the top brands and options:
1. Bosch. Bosch fuel pumps are known for excellent reliability and consistent flow rates. Many users report using Bosch pumps for over five years without any significant issues. They are designed for optimal performance in the Infiniti G35.
2. Walbro. Walbro pumps are recognized for high flow rates, which can support increased power demands. They come with installation kits, making them user-friendly for DIY projects. Many performance enthusiasts favor Walbro for its performance capabilities.
3. AEM. AEM fuel pumps deliver high performance with minimal power consumption. They operate quietly and efficiently, minimizing vibrations. AEM has an excellent reputation for customer service and product support.
4. NISMO. NISMO fuel pumps are designed specifically for Nissan and Infiniti vehicles like the G35. These pumps are engineered to meet high-performance demands and offer excellent fit and performance.
5. DeatschWerks. The DW200 and DW300 are popular upgrades for the G35 and 350Z. These pumps provide high flow rates and come with installation guides that walk you through the replacement process.
6. DELPHI FE0351. This fuel pump can perform at 185 LPH, which is higher than the stock pump's 90-120 LPH output. It is a good upgrade option for those who want more flow capacity.
7. MUCO and DOLKSN. These are aftermarket fuel pump assemblies available on Amazon that are direct replacements for the G35. They include all necessary components for installation and are designed for easy installation.
Recommended: KEMSO Fuel Pump for Your 2004 Infiniti G35
For a reliable, high-performance replacement fuel pump for your 2004 Infiniti G35, consider KEMSO brand. KEMSO fuel pumps are designed as OEM Replacement parts, meaning they meet or exceed the original manufacturer's specifications for fit, form, and function. They are built with high-quality materials to ensure long-lasting performance, and they come with a lifetime warranty that gives you peace of mind.
KEMSO fuel pumps are a smart choice because they are precision-engineered for your specific vehicle, ensuring a perfect fit and reliable fuel delivery. The lifetime warranty means you never have to worry about buying another fuel pump again. To learn more and purchase a KEMSO fuel pump for your 2004 Infiniti G35, visit https://www.kemsoracing.com/.
How to Replace the Fuel Pump on a 2004 Infiniti G35
If you are handy with tools, you can replace the fuel pump yourself. Follow these steps carefully:
Step 1: Prepare your work area. Park the vehicle on a firm, level surface and engage the parking brake. Work in a well-ventilated area away from open flames. Have a fire extinguisher nearby.
Step 2: Relieve fuel system pressure. Disconnect the negative battery cable. Remove the fuel pump fuse from the fuse box. Start the engine and let it run until it stalls. Crank the engine two or three more times to release any remaining fuel pressure.
Step 3: Access the fuel pump. Remove the rear seat cushion. For the coupe, you may need to access the compartment behind the passenger seat. Remove the metal access panel by rotating the plastic clips 90 degrees clockwise.
Step 4: Disconnect the wiring and fuel lines. Disconnect the electrical connector on top of the fuel tank. Remove the fuel hoses from the old pump. Be careful not to damage the fuel level sensor.
Step 5: Remove the old fuel pump. Unscrew the retaining ring that holds the fuel pump in place. Carefully lift the pump assembly out of the fuel tank. Be cautious of any remaining fuel in the assembly.
Step 6: Install the new fuel pump. Compare the new pump with the old one to make sure you have the correct part. Attach the fuel hoses to the new pump before installing it into the tank. Insert the new pump assembly and secure it with the retaining ring. Reconnect all electrical connectors.
Step 7: Reassemble and test. Replace the access panel and rear seat. Reconnect the negative battery cable. Turn the ignition to the "on" position without starting the engine. This will prime the fuel system. Listen for the pump to hum for two to three seconds. Check for any fuel leaks.
Performance Tips to Extend the Life of Your G35 Fuel Pump
To get the most life out of your new fuel pump, follow these simple tips:
1. Keep the fuel tank at least a quarter full. Running the tank low frequently can cause the fuel pump to overheat and wear out faster.
2. Use premium gasoline. Choosing premium gasoline helps keep the fuel system clean and reduces strain on the pump.
3. Replace the fuel filter regularly. A clogged fuel filter puts additional strain on the fuel pump, shortening its lifespan.
4. Clean the fuel pump strainer. Timely washing or replacing the new filter and strainer helps maintain proper fuel flow.
Final Thoughts
Replacing the fuel pump on your 2004 Infiniti G35 is a job that most DIYers can handle with the right tools and instructions. The most important thing is to recognize the symptoms of a failing pump early and replace it before it leaves you stranded. Whether you choose a Bosch, Walbro, or KEMSO fuel pump, make sure you get a quality part that fits your vehicle. For a reliable, high-performance option with a lifetime warranty, visit https://www.kemsoracing.com/ to find the perfect fuel pump for your G35.