Rear Seat MethodFor a 2006 Nissan Altima with the Le-2.5L engine, accessing the fuel pump is slightly different. There’s an access door beneath the rear seats. Start by unscrewing the fuel filler cap to release pressure inside the fuel tank. Disconnect the battery’s negative terminal and remove the rear seat bottom. Turn the retainers 90 degrees to remove the fuel pump inspection hole cover. Disconnect various components like the fuel level sensor, fuel pump assembly electrical connector, EVAP hose quick connector, and the fuel feed hose quick connector. Proceed to remove the lock ring and, subsequently, the fuel pump assembly.Specific Steps for Fuel Pump ReplacementTrunk ProcedureTrunk Panel Removal: Lift the panel behind the rear seats.Locate Seal and Cover: Find the seal and cover housing the fuel lines.Disconnect Electrical Connection: Release the four 1/4 turn plastic phillips head locks on the cover. Lift the cover and disconnect the electrical connection to the pump.Release Fuel Line: Squeeze the connector lock fitting and pull the fuel line fitting toward the front of the car.Remove Pump: Loosen the threaded black ring securing the pump in the tank. Lift the pump halfway up, maneuvering around wiring and the fuel gauge sending unit float
Rear Seat ProcedurePressure Release: Unscrew the fuel filler cap to release pressure in the fuel tank.Disconnect Battery: Prior to any work, disconnect the battery’s negative terminal.Remove Rear Seat: Take out the rear seat bottom to access the fuel pump inspection hole cover.Disconnect Components: Release the fuel level sensor, fuel pump assembly electrical connector, EVAP hose quick connector, and the fuel feed hose quick connector.Remove Lock Ring: Unscrew six screws and remove the lock ring holding the fuel pump assembly in place.
Safety Precautions and TipsBe Cautious of Pressure: The fuel line is under pressure, and gas may spray when disconnecting it.Mindful Maneuvering: When removing the pump, be cautious of interference from wires and the fuel gauge sending unit float.Anti-Spark Environment: Avoid smoking during the process.Filter Replacement: Note that the pump assembly in these Nissan Altima models includes the filter/sock, serving as the sole filter in the entire fuel system.