Porsche Cayenne runs out of gas when tank is 1/4 full despite new pump installation on Porsche Cayenne

Some Porsche Cayenne owners report experiencing issues with running out of gas even when the tank is 1/4 full, despite having a new fuel pump installed. This problem may arise from consistently driving with too little fuel, which can lead to fuel pump failure as the pump relies on fuel for cooling. Additionally, a faulty fuel pump relay can prevent the pump from functioning properly, causing fuel delivery issues. Some owners have also noted that a malfunctioning or improperly calibrated fuel level sensor may provide inaccurate readings of the fuel level in the tank. Furthermore, driving with low fuel can draw residues from the tank, affecting pump performance. Lastly, problems with fuel pressure, such as a clogged fuel filter or issues with the fuel pressure regulator, can result in inadequate fuel supply to the engine, despite the gauge indicating fuel presence. It is crucial for owners experiencing these issues to diagnose and address these potential causes promptly.