Crankcase-Ventilation/oil separator

BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate.

BMW Crankcase Vent Valve - Febi Bilstein 11617501566

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Standard version without foam insulation

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【Premium Quality】: Built to strict quality control standards 【Function】: Helps relieve pressure from the crankcase as needed, replacement oil

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