Fuel Filler Neck - 2011 528i

The BMW F10 5-Series fuel filler neck (BMW PN 16117238376) routes from the fuel door to the tank, integrating the check valve and vent lines critical for the EVAP system. Found across 2010-2016 528i, 535i, and 550i models regardless of N52, N55, or N63 engine, this component commonly triggers P0455/P0456 leak codes when the internal check valve sticks or the rubber hose connection at the tank fractures. When sourcing from salvage yards, prioritize 2012+ donor cars as early 2010-2011 production used superseded PN 16117221781 featuring a weaker vent hose connection prone to cracking. Always inspect the upper collar for stress cracks where the fuel cap seals, and verify the DMTL pump connection isn't snapped off. Installation requires removing the left rear wheel and inner fender liner for access—never force the metal tube during alignment to avoid stress fractures at the plastic elbow joint, and replace the O-ring seal (PN 16111184717) while disturbed.