Bremmen Parts Oil Separation & Breather System for BMW 6 Series F13 (2012+)

Clear BMW chassis

Every car has a crankcase vent system that is supposed to suppress oil from making it into the intake ports and combustion chamber. A good functioning system will separate oil from the atmosphere and return it to the oil pan (or collect it in a catch can) while allowing the leftover vapors to burn in the combustion chamber or recirculate through the system. This has always been known as a PCV system (Positive Crankcase Ventilation) but BMW has several other names for it - oil separator, crankcase vent (CCV), and cyclonic separator. Failures in the system will allow raw oil to enter the intake and eventually into the engine itself which can have disastrous effects on engine performance and longevity. As emissions regulations on oil and gas venting have gotten more stringent the PCV systems have gotten more complex and failure prone. And because the CCV is intertwined with other systems you could experience rough running, loss of power, higher oil consumption, misfiring, stalling, or other annoying issues. There is no replacement interval for these so we recommend inspecting your crankcase vent system as part of your regular maintenance routines. Symptoms of a bad crankcase vent are: whitish or yellowish film on the underside of the oil cap, whistling/squealing noises (not caused by a belt), suction on the oil cap that makes it hard to unscrew, large amounts of white smoke from the exhaust, and excessive oil consumption.

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CCV/PCV Breather Hoses (5)

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Bremmen Crankcase Ventilation Connecting Pipe - Cylinders 1-4 - E70/1...

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T#:640154

Part#: 11157646086

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Sale - Save 21% $ 52.99

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05-03-2026

$ 41.61 USD

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Sale - Save 21%

$ 52.99

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05-03-2026

$ 41.61 USD

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Connects to the valve cover over cylinders 1-4. These pipes tend to crack after become brittle from numerous heating and cooling cycles. If this happens, Bremmen pipes are a perfect replacement to restore a tight seal and prevent any check engine codes.

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Bremmen Crankcase Ventilation Connecting Pipe - Cylinders 5-8 - E70/1...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:640153

Part#: 11157646087

In Stock

Sale - Save 20% $ 49.99

This product was last offered at the strikethrough price on
05-03-2026

$ 39.98 USD

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Sale - Save 20%

$ 49.99

This product was last offered at the strikethrough price on
05-03-2026

$ 39.98 USD

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Connects to the valve cover over cylinders 5-8. These pipes tend to crack after become brittle from numerous heating and cooling cycles. If this happens, Bremmen pipes are a perfect replacement to restore a tight seal and prevent any check engine codes.

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Crank Case Vent Hose - S63

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T#:35357263

Part#: 11157843150

In Stock

$ 60.99

This product was last offered at the strikethrough price on
05-03-2026

$ 44.99 USD

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$ 60.99

This product was last offered at the strikethrough price on
05-03-2026

$ 44.99 USD

Limited Qty Sale

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The engine crankcase breather hose is a vital part of the Positive Crankcase Ventilation (PCV) system, responsible for directing pressurized air from the engine crankcase to the air/oil separator, also known as the PCV valve. This separator removes oil vapors from the air, allowing the oil to return to the engine while feeding the filtered air back into the intake system to support efficient combustion.

As a byproduct of the combustion process, positive crankcase pressure naturally builds up in the engine. The breather hose operates under constant exposure to heat, pressure, and an air/oil vapor mixture, making it prone to wear and failure over time. Ensuring the breather hose is in proper working condition is crucial for maintaining engine performance, adhering to emissions standards, and preserving the functionality of the PCV system. Promptly replace this component at the first signs of damage or degradation to avoid further complications.

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