BMW 5 Series F18 Fuel Pump Assembly DEFL321 16117260642

For BMW 5 Series F18 chassis (including 520Li, 525Li, 528Li, etc., 2.0T/3.0L automatic) 2010-2017, fuel pump assembly pressurizes and delivers fuel from tank to engine fuel system to ensure stable fuel supply and pressure regulation. OEM numbers 16117260642 and DEFL321 for cross-checking with stock or OEM parts. Replacement difficulty: medium; professional technician recommended; disconnect battery negative; ensure tank seal integrity. Assembly includes pump, filter, and float; can replace to fix low fuel pressure or inaccurate fuel gauge; suitable for bulk stocking.