Nissan 17040-7S000 Complete Fuel Pump

Take the cable away from the negative terminal of the battery. Relieve the fuel system pressure. With Titan models, you can't see or inspect the fuel pump like other models; you must remove the fuel tank. Pull out the fuel pump links, and detach the electrical cord from it. Make a note where the fuel pump module sits in relation to the tank before you loosen the lock ring holding it in place. A special tool from auto parts shops will loosen the lock ring, but large pliers work as an alternative. Gently take the fuel pump module out of the tank, turning it at an angle so you don't damage the arm that controls the fuel level sensor float. In certain cases, you need to disconnect the fuel level sensor from the pump module before taking it off. Look at the fuel pump and fuel level sensor O-ring, replace it when you see damage. To move a fuel level sensor to a new fuel pump module, follow the sensor wires until they meet its electrical plug and remove it. Separating the sensor from its pump section involves using needle-nose pliers to push down on the lock buttons on both sides and gently easing the sensor upwards. Snap the locks of the sensor module into their proper places during installation. Installation is the reverse of removal.

The installation process involves reversing the removal steps. Ensure that the fuel pump module is properly aligned, and the lock ring is securely tightened. If the O-ring was replaced, make sure it's properly seated. Finally, reverse the steps to reassemble any components that were removed to access the fuel pump inspection hole.