BMW 3 Series/5 Series N46 Engine Fuel Pump Core 0580453021 Straight Tube Replacement for Old Part

BMW 3 Series (E90/E91) and 5 Series (E60) with N46 engine can use fuel pump assembly 0580453021 as replacement. This component uses original injection molding and copper-core motor; housing thickness is 0.3 mm thicker than some aftermarket parts, offering fuel resistance and fatigue life closer to factory standards. OEM numbers correspond to N46A4 engines, including 0580453021, 1614118031, and DK-126; maintains stable fuel delivery from tank to high-pressure pump with pressure variation within ±0.05 MPa. Replacement difficulty moderate; first remove related components.