Subaru 42021SA070 Fuel Pump Sending Unit

Begin by reducing fuel pressure then disconnect battery cable terminals and unmount both the rear seat and its floor mat. On Forester models you will find two access plates positioned behind the rear seat yet the correct one for this job is the right sides panel located on the passenger seat. Replace the access plate screws with your hand and lift the plate upward from the bottom floorpan. One must disconnect both the fuel pump/sending unit electrical connector and the quick-connect fittings leading to the fuel supply hose and fuel return hose. You should first loosen the hose clamp to separate the jet pump hose from the fuel tank. After that disconnect the jet pump hose and remove the fuel pump/Fuel Level Sensor mounting bolts. Heavy lifting of the fuel pump/Fuel Level Sensor assembly from the tank allows you to maneuver it while safeguarding the float arm against damage before removing the old gaskets. It is essential to clean the pump inlet strainer before putting the pump into service with new installation gaskets. Start by running the engine and then verify for any leakage after finishing the installation which follows the opposite steps of removal.

Disconnect the negative battery terminal and relieve fuel pressure. Remove the rear seat cushion and fuel pump access cover screws. Disconnect the electrical connector and fuel supply line from the fuel pump module. Remove the fuel pump cover and carefully extract the fuel pump module, protecting the fuel level sensor float arm. Remove and inspect the seal ring, replacing if deteriorated. For turbo models, remove the right rear carpet trim or quarter trim panel, disconnect the Fuel Pump Driver Module electrical connector, remove the fastener and Fuel Pump Driver Module. Reverse steps for installation.

It should be placed on a clean workbench.