Oil Separation & Breather System for BMW E90 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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Genuine BMW Crankcase Pressure Regulator Valve - E9X M3 S65
Genuine BMW Crankcase Pressure Regulator Valve - E9X M3 S65
Genuine BMW - Corporate Logo
T#:180985
Part#: 11157848155
Ships in 1 day
2% 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.

$ 469.99 USD
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2% 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.

$ 469.99 USD
Free Shipping
Add to Wish List
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 Oil Separator Service Kit - E9X M3 S65
Genuine BMW Oil Separator Service Kit - E9X M3 S65
Genuine BMW - Corporate Logo
T#:340670
Part#: 11157848155KT
Ships in 1 day
$ 1,085.99 USD
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$ 1,085.99 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
Vacuum Pipe - E90, E92, E93
Genuine BMW - Corporate Logo
T#:62439
Part#: 34302283606
In Stock
14% 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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14% 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
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Genuine BMW Vacuum Pipe -
This item fits the following BMW Chassis:
E90,E92,E93

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