Rein Oil Separation & Breather System for BMW 7 Series F01 (2009+)

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.

Sub-Categories

CCV/PCV Breather Hoses (5)

Sort By:

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

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:402034

Part#: 11157646087

In Stock

$ 53.99 USD

Add to Wish List

Qty

$ 53.99 USD

Add to Wish List

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, OEM Rein pipes are a perfect replacement to restore a tight seal and prevent any check engine codes.

Show More Show Less

OEM Rein Cylinders 1-4 Crankcase Ventilation Connecting Pipe - E70/1 ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:402033

Part#: 11157646086

In Stock

$ 50.99 USD

Add to Wish List

Qty

$ 50.99 USD

Add to Wish List

Show More Show Less

BMW N63 4.4L Vent Pipe - Each

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:7244416

Part#: 11158647961

In Stock

$ 327.99

This product was last offered at the strikethrough price on
05-04-2026

$ 171.99 USD

Add to Wish List

Qty

$ 171.99 USD

Add to Wish List

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.