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Oil Separation & Breather System

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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S55 Silicone Crankcase Vent Hose (11127850244)

10X Entries Into Our F80 M3 Sweepstakes

T#:57797979

Part#: 018465LA02

Ships on Mar 4, 2027

$ 99.99 USD

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$ 99.99 USD

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Oil Separator kit - N63

10X Entries Into Our F80 M3 Sweepstakes

T#:56291074

Part#: 11158636540KT2

In Stock

$ 429.67 USD

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$ 429.67 USD

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If your BMW is burning oil, showing unmetered air faults, or suffering from degraded throttle response, a compromised breather system is usually the culprit. The N63 Crankcase Breather Package pairs Genuine BMW oil separators with OE tier Rein connecting pipes. Designed to restore factory level oil separation and sealed vacuum integrity across both cylinder banks

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Vacuum Pipe

10X Entries Into Our F80 M3 Sweepstakes

T#:52586629

Part#: 11157603816

In Stock

Sale - Save 7% $ 29.99

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

$ 27.89 USD

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Sale - Save 7%

$ 29.99

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

$ 27.89 USD

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Crankcase Ventilation Refresh Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:57543744

Part#: 11158647962KT2

In Stock

$ 265.99

This product was last offered at the strikethrough price on
09-29-2026

$ 264.99 USD

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$ 264.99 USD

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Maintain optimal engine vacuum and prevent oil blow-by failures under hard driving with this complete Crankcase Ventilation Refresh Kit. Aged oil separator valves and heat stressed plastic hoses fail unexpectedly, leading to oil ingestion, loss of power, and damaged rear main or valve cover gaskets from excessive crankcase pressure buildup. Designed as a direct fit refresh, this kit ensures crisp throttle response, proper engine breathing, and total peace of mind on the street or track.

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Oil Separator Vent Hose

10X Entries Into Our F80 M3 Sweepstakes

T#:53326231

Part#: 11617522933

In Stock

Sale - Save 15% $ 23.99

This product was last offered at the strikethrough price on
09-16-2026

$ 20.39 USD

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Sale - Save 15%

$ 23.99

This product was last offered at the strikethrough price on
09-16-2026

$ 20.39 USD

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E70 Return Pipe

10X Entries Into Our F80 M3 Sweepstakes

T#:52551447

Part#: 11537806706

In Stock

Sale - Save 20% $ 129.99

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

$ 103.99 USD

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Sale - Save 20%

$ 129.99

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

$ 103.99 USD

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Crank Case Ventilation Valve - Priced Each

10X Entries Into Our F80 M3 Sweepstakes

T#:53326230

Part#: 11158647299

In Stock

Sale - Save 8% $ 80.99

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

$ 74.69 USD

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Sale - Save 8%

$ 80.99

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

$ 74.69 USD

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Crank Case Vent Hose

10X Entries Into Our F80 M3 Sweepstakes

T#:58234541

Part#: 11157843151

Ships on Mar 16, 2027

Sale - Save 10% $ 33.99

This product was last offered at the strikethrough price on
10-08-2026

$ 30.59 USD

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Qty

Sale - Save 10%

$ 33.99

This product was last offered at the strikethrough price on
10-08-2026

$ 30.59 USD

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

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