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Hengst CCV/PCV Breather Hoses

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Oil Separator Valve

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T#:22064593

Part#: AS826M-D851

Ships on Jul 29, 2026

$ 62.99 USD

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$ 62.99 USD

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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.

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Hengst CCV/PCV Breather Hoses

Oil Separator Valve

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