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Oil Separation & Breather System

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 (6)

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Rein Vent Pipe - Priced Each - 11158647961 - F07, F10 5 Series, F06 F...

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T#:7244416

Part#: 11158647961

In Stock

$ 318.99

This product was last offered at the strikethrough price on
06-29-2026

$ 171.99 USD

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$ 171.99 USD

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BMW N63 4.4L Vent Pipe

The BMW N63 4.4L Vent Pipe addresses common issues with oil separators freezing in cold weather conditions. This problem often occurs if the vehicle is driven before it is fully warmed up, leading to a howling noise and multiple oil leaks. The crankcase breather valve in the vent pipe purges oil vapor from the engine block into the valve cover. However, condensation can sometimes cause the valve to freeze, which may result in the oil separator system failing, cracking, or disintegrating. This replacement vent pipe ensures proper function and prevents costly damage by maintaining the integrity of the oil separator system.

Benefits:

Prevents Freezing Issues: Reduces the risk of oil separator failure in cold weather conditions.
Eliminates Oil Leaks: Helps prevent leaks caused by frozen oil separators.
Ensures Proper Ventilation: Maintains effective purging of oil vapor from the engine block.
Durable Construction: Built to withstand harsh weather conditions and engine stress.
Direct Replacement: Designed to fit seamlessly with BMW N63 4.4L engines.

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Rein Crankcase Ventilation Hose Kit (CCV) - 11617504535K - E46, E39, ...

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T#:379190

Part#: 11617504535K

Ships in 1 Business Day

$ 79.99 USD

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$ 79.99 USD

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Turner Motorsport presents the Crankcase Ventilation System Refresh Kit for BMW owners experiencing malfunctioning or aged CCV systems. This comprehensive kit includes all necessary hoses to complete a refresh, ensuring optimal performance and reliability for your BMW's CCV system.

Addresses malfunctioning CCV systems
Ensures proper ventilation of the crankcase
Comprehensive kit includes all necessary hoses
Restores performance and reliability
Compatible with various BMW models

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Rein N52 Crankcase Ventilation Return Pipe (CCV) - 11157567801 - E90 ...

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T#:402081

Part#: 11157567801

In Stock at Vendor

$ 81.38

This product was last offered at the strikethrough price on
08-13-2026

$ 78.99 USD

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$ 78.99 USD

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Located under intake manifold

Rein M54 N52 Crankcase Ventilation Hose (CCV) - 11157567802 - E9x, E6...

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T#:591594

Part#: 11157567802

Ships in 3 Business Days

$ 74.99

This product was last offered at the strikethrough price on
10-22-2026

$ 62.99 USD

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$ 62.99 USD

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From oil separator to oil pan vent tube

Rein CCV Hose - 11617563477 - E60, E63 E64 6 Series, E65 E66 7 Series...

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T#:402019

Part#: 11617563477

Ships in 3 Business Days

$ 109.99

This product was last offered at the strikethrough price on
10-21-2026

$ 91.99 USD

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$ 91.99 USD

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Is your Crankcase Ventilation system malfunctioning? Or maybe it's just time to refresh the system? This part is the necessary hose to refresh your CCV system.

FTP Motorsport PCV Valve Upgraded Replacement - N54

T#:583063

Part#: SG84036

Special Order: No Guaranteed ETA

$ 60.00 USD

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$ 60.00 USD

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The OEM plastic PCV valve does not hold pressure well even when brand new. What this means is that when the turbochargers are making boost, pressurized air can become forced backwards through the valve and back into the crankcase. Depending on the condition of your PCV valve this can range from irritating to dangerous as a pressurized case can cause all sorts of issues. Additionally, if your valve cover is cracked due to age or has a bad gasket you are more than likely experiencing a pressure leak either internally or externally. These two features can cause even a low-mileage N54 to run like a tired elephant, sometimes even unlocking a special bonus function known as "Limp Mode". The solution is to replace any failed components and upgrade the PCV valve to something more capable withstanding the abuse of a turbocharged environment. FTP Motorsport has you covered with this solid aluminum valve assembly. It is essentially the same thing that came in your car from the factory, made out of aluminum. The internal components have also been made to fit tighter and outlast the life of an off the shelf replacement. No, this won't be the very last PCV valve you buy, but it will most certainly alleviate a lot of headaches common to N54 owners. And if you're tuned, big twin or single swapped you need one of these yesterday.

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Rein N52 Oil Separator Valve (CCV) - 11617531423 - E9x, E60, E61 ...

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T#:594299

Part#: 11617531423

Ships in 3 Business Days

$ 120.81 USD

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$ 120.81 USD

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The oil separator can be replaced on its own but for a complete service we also recommend replacing the oil separator hoses and cleaning the valve cover. Any valve cover or intake manifold work should include a new oil separator valve.

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Rein N62 Crankcase Vent Hose (CCV) - Cylinders 1-4 - 11617547185 - E6...

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T#:384973

Part#: 11617547185

Ships in 3 Business Days

$ 57.99

This product was last offered at the strikethrough price on
10-22-2026

$ 29.79 USD

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$ 29.79 USD

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Should be replaced anytime leaks are detected

Rein N62 Crankcase Vent Hose (CCV) - Cylinders 5-8 - 11617547186 - E6...

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T#:384972

Part#: 11617547186

Ships in 3 Business Days

$ 59.99

This product was last offered at the strikethrough price on
10-22-2026

$ 33.39 USD

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$ 33.39 USD

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Should be replaced anytime leaks are detected

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Oil Separation & Breather System
- CCV/PCV Breather Hoses (6)

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