Changing Fuel Filter On 2008 Infiniti G35: Step-By-Step Guide

The fuel filter in the 2008 Infiniti G35 is located inside the fuel tank and is part of the fuel pump control module. To change the fuel filter, you will need to remove the rear seat cushion to access the fuel tank. Then, relieve the fuel pressure, take off the lines, and pull out the fuel pump assembly. It is recommended to replace the fuel pump as well, as higher-mileage cars may experience hard start-ups and drive-ability issues.

The fuel filter is part of the fuel pump control module, located inside the fuel tank

To change the fuel filter on a 2008 Infiniti G35, you must replace the entire fuel pump control module, as the fuel filter is part of this module and is located inside the fuel tank. This is not a simple task, but it can be done without taking the car to a mechanic.

First, wait until your tank is low on fuel. Then, remove the rear seat cushion to access the fuel tank. You will see an access panel to the fuel tank; open this and relieve the fuel pressure. Take off the lines and pull out the fuel pump assembly. The fuel filter is part of this assembly, at the bottom of the fuel bucket.

It is recommended that you replace the pump as well as the filter, as pumps tend to fail in higher-mileage cars, causing hard startups and driveability issues. Aftermarket pumps are available and are cheaper than OEM.

Access the fuel tank by removing the rear seat cushion

To access the fuel tank by removing the rear seat cushion of your 2008 Infiniti G35, follow these steps:

First, make sure your car is parked on a flat, hard, and level surface. Remove any fuel from the vehicle using a fluid pump and a container. The more fuel you remove, the lighter the tank will be, making it easier to remove. Place wheel chocks around the front tires to prevent the car from moving.

Next, you will need to raise the car using a floor jack. Work on one side at a time, lifting the rear of the vehicle with the jack placed under the body pinch weld. Lift the vehicle as high as your jack stands will allow to ensure enough clearance for the fuel tank. Once you've lifted the car, rest it on jack stands.

Now you can start to remove the rear seat cushion. Lift up on the front of the seat on both sides, then slide the seat forward. It's a tight catch, so you may need to use some force. Place your hand between the cushion and body of the vehicle to feel for the latch. The front side of the seat pops out, while the back side is hooked.

With the rear seat cushion removed, you should now be able to locate the fuel tank and access the fuel tank hat. Remember to relieve the fuel pressure before attempting to remove the fuel lines and pump assembly.

Relieve the fuel pressure, take off the lines, and remove the fuel pump assembly

To relieve the fuel pressure on your 2008 Infiniti G35, you have a few options. The G35 service manual suggests removing the fuel pump fuse located in the IPDM E/R (fusebox by the battery). Then, start the engine and let it run until it stalls. Crank the engine a few more times to release all the fuel pressure. It's also recommended to unscrew the gas cap.

If you have access to Uprev Cipher, this software also has a function to relieve fuel pressure via the ECU. Alternatively, you can disconnect the harness going to the pump if your fuel tank is exposed.

Now, to take off the lines and remove the fuel pump assembly. Firstly, wait until your fuel tank is low. Remove the rear seat cushion and you will find an access panel to the fuel tank. Disconnect the electrical connector and fuel supply line from the fuel pump module. Clean the area around the retainer, remove the bolts, and lift the module to access the crossover tube. Disconnect the tube and remove the module.

When replacing the module, be sure to discard the old O-ring and install a new one. Check the fuel inlet strainer and discard the old sensor O-ring, installing a new one.

Replace the fuel pump as well as the filter, as recommended by Nissan

To replace the fuel pump and filter on a 2008 Infiniti G35, you will first need to purchase a replacement fuel pump that is compatible with your car. You can find these at most auto parts stores or online. Once you have the new pump, follow these steps:

• Park your car on a level surface and engage the parking brake.
• Remove the rear seat cushion to access the fuel tank.
• Wait until your fuel tank is low. It is important to avoid spilling fuel when you are working on the fuel system.
• Relieve the fuel pressure and disconnect the fuel lines from the fuel pump assembly.
• Remove the fuel pump assembly, which includes the fuel filter, from the fuel tank.
• Install the new fuel pump assembly, ensuring that any reusable brackets and pick-up screens are attached.
• Reconnect the fuel lines and secure them with appropriate clamps or fittings.
• Refill the fuel tank and start the engine to test for leaks.

It is important to note that working on the fuel system can be dangerous, so it is recommended to have a qualified mechanic perform this replacement if you are not experienced in auto repair. Additionally, always take fire precautions when working on the fuel system, such as disconnecting the battery to reduce the risk of sparks.

The fuel filter is separate from the pump and can be seen at the bottom of the fuel bucket

To change the fuel filter on a 2008 Infiniti G35, you will need to access the fuel tank. The fuel filter is located inside the tank and is part of the fuel pump control module.

Firstly, wait until your tank is low, then remove the rear seat cushion. There will be an access panel to the fuel tank. Relieve the fuel pressure, take off the lines, and pull out the fuel pump assembly.

It is recommended that you also replace the pump, as high-mileage cars can experience hard startups and drive-ability issues due to pump failure.

Frequently asked questions