Oil Separation & Breather System for BMW E93 M3 S65 4.0L

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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 (3)

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Genuine BMW PCV Non-return Valve - E9X M3, E6X M5 M6

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

T#:36640

Part#: 11617836553

In Stock

14% off MSRP $ 63.76

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 55.03 USD

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14% off MSRP

$ 63.76

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 55.03 USD

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The PCV system removes engine blow-by gases and flushes the crankcase with fresh air. PCV system problems result in numerous and sometimes severe problems including multiple oil leaks, contamination of multiple sensors and catalytic converters, deposit build-up in the air intake passages, and failed emissions tests.

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Genuine BMW Crankcase Pressure Regulator Valve - E9X M3 S65

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T#:180985

Part#: 11157848155

Ships in 3 Business Days

3% off MSRP $ 479.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 465.99 USD

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3% off MSRP

$ 479.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 465.99 USD

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This is a genuine BMW replacement crankcase pressure regulator valve that is attached to the top of the valve covers. This is often also referred to as an oil separator.

Genuine BMW Crank Case Vent Hose - E90 E92 E93 M3

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T#:36659

Part#: 11617838288

Ships in 2 Business Days

6% off MSRP $ 71.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 67.99 USD

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6% off MSRP

$ 71.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 67.99 USD

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Genuine BMW Vent Hose -
This item fits the following BMW Chassis:
E90,E92,E93

Fits BMW Engines including:
S65

Genuine BMW Oil Separator Service Kit - E9X M3 S65

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T#:340670

Part#: 11157848155KT

Ships in 3 Business Days

$ 1,077.99 USD

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$ 1,077.99 USD

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The crankcase breather, or also commonly called the PCV or oil separator, allows the crankcase to expel air without losing any oil. When failing, the PCV can cause misfires and a rough running commonly experienced at idle. This kit allows you to service your breather system and keep your vehicle's emissions system in top shape and running great.

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Vacuum Pipe - E90, E92, E93

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

T#:62439

Part#: 34302283606

In Stock

13% off MSRP $ 91.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 82.99 USD

Limited Qty Sale

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13% off MSRP

$ 91.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 82.99 USD

Limited Qty Sale

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Genuine BMW Vacuum Pipe -
This item fits the following BMW Chassis:
E90,E92,E93

ECS Tuning Baffled Oil Catch Can - 8oz

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T#:13496655

Part#: 003779ECS05-02

In Stock

Sale - Save 10% $ 238.99

This product was last offered at the strikethrough price on
06-14-2026

$ 215.09 USD

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Qty

Sale - Save 10%

$ 238.99

This product was last offered at the strikethrough price on
06-14-2026

$ 215.09 USD

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Upgrade Your BMW with ECS Baffled Oil Catch Can

Modern emission regulations require a closed PCV/Breather system for cleaner operation. However, inefficient oil particle capture can lead to excessive oil vapor ingestion, causing carbon buildup, reduced performance, and fuel economy. ECS Tuning's updated ECS Baffled Oil Catch Can, now with an easy-to-empty 1/4" drain fitting, is engineered to collect toxic blow-by gases, minimize carbon deposits, and reduce oil contamination within engine oil. Recirculating oil vapor ensures emissions compliance without venting to the atmosphere.

Key Features:
Highly Efficient Oil Separator: Strategically positioned 4 chamber baffle system maximizes oil/air separation and minimizes oil droplets in the intake tract.
Integrated Dipstick: Knurled and black anodized oil dipstick simplifies oil volume inspection.
Reservoir: Available in 6oz or 8oz capacity with a 1/4" NPT drain plug fitting.
Serviceable: Easily removable baffle plates and drain plug for cleaning.
Easy/Customizable Installation: Combine with the ECS Universal Bracket Kit for simplified installation and adjustable mounting locations.
Leak-Free Fittings: Machined -10AN ORB (O-Ring Boss) fittings available for secure connections (fittings sold separately).

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Vacuum Pipe - E90, E92, E93

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

T#:36663

Part#: 11617838382

Ships in 9 Business Days

5% off MSRP $ 55.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 52.99 USD

Add to Wish List

Qty

5% off MSRP

$ 55.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 52.99 USD

Add to Wish List

Genuine BMW Vacuum Pipe -
This item fits the following BMW Chassis:
E90,E92,E93

Fits BMW Engines including:
S65

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Oil Separation & Breather System for BMW E93 M3 S65 4.0L

Sub-Categories

Genuine BMW PCV Non-return Valve - E9X M3, E6X M5 M6

Genuine BMW Crankcase Pressure Regulator Valve - E9X M3 S65

Genuine BMW Crank Case Vent Hose - E90 E92 E93 M3

Genuine BMW Oil Separator Service Kit - E9X M3 S65

Vacuum Pipe - E90, E92, E93

ECS Tuning Baffled Oil Catch Can - 8oz

Vacuum Pipe - E90, E92, E93

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