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The Gates oil separator and crankcase vent valve for 1997–1999 BMW 328i with the 2.8L six‑cylinder is a replacement ventilation component for that engine. It separates oil from crankcase gases and helps maintain correct internal pressure; installing a new separator restores the intended ventilation path and helps prevent oil contamination of intake components when the original part degrades.
Gates 97-99 BMW 328I 6-Cyl. 2.8L Oil Separator Crankcase Vent Valves
