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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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Packaged by Turner - Corporate Logo
T#:557341
Part#: 11111318185TMSKT
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When your CPV O-ring fails it causes a slow oil leak on the passenger side of the engine, making an oily mess that frequently resembles a rear main seal leak. Replacing the CPV with an upgraded o-ring ensures a long-term solution to this common problem. 

The factory o-ring over time fails from heat cycling and oil exposure due to the Buna rubber used in OEM o-rings, while the included Viton Fluoroelastomer is resistant to a much higher temperature to ensure prolonged life without leaking. 

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BMW N54 3.0L Blow-By Vent Hose
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Rein - Corporate Logo
T#:594297
Part#: 11157553949
In Stock
$ 40.99 USD
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This hose directs the oil & combustion vapors from the valve cover and directs them to the intake manifold where they are put through combustion again in order to reduce emissions. When installing one of our N54 Oil Catch Cans the connections on this hose will often break. We recommend replacing this hose at the same time as your catch can. When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.
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URO PCV Breather Hose Kit - E39, E46, E83
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URO - Corporate Logo
T#:592719
Part#: BMM54PCVKIT
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$ 117.99 USD
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Comes with everything needed to refresh the PCV System!

Rein Crankcase Ventilation Return Pipe - E60, E90, Z4
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Rein - Corporate Logo
T#:402081
Part#: 11157567801
Ships in 3 Business Days
$ 81.38

This product was last offered at the strikethrough price on
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$ 78.99 USD
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Located under intake manifold

Rein - Crank Case Vent Hose - F10 M5, F12 M5, F13 M6
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Rein - Corporate Logo
T#:26404796
Part#: 11157843151
In Stock
$ 32.99 USD
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Rein Crank Case Vent Hose is a high-quality replacement part designed to enhance the performance and longevity of your vehicle’s engine. Manufactured by Rein Automotive, this vent hose is built to withstand high pressures and temperatures, ensuring reliable crankcase ventilation. Engineered for a precise fit, it helps prevent harmful oil vapors from entering the intake manifold, improving overall engine efficiency. Available at Turner Motorsport, this vent hose is an ideal choice for drivers looking to maintain their vehicle’s performance and emissions standards.

  • Designed for optimal crankcase ventilation, improving engine performance
  • Reduces oil vapor contamination in the intake system, protecting engine components
  • Made with durable materials to resist wear from heat and pressure
  • Ensures precise fit and easy installation as a direct OEM replacement
  • Helps reduce harmful emissions, supporting cleaner engine operation

Turner Motorsport offers the Rein Crank Case Vent Hose as a dependable solution to keep your engine running smoothly while meeting emissions regulations.

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OEM Rein Cylinders 5-8 Crankcase Ventilation Connecting Pipe - E70/1 ...
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Rein - Corporate Logo
T#:402034
Part#: 11157646087
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$ 53.99 USD
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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.
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Packaged by Turner - Corporate Logo
T#:51356040
Part#: 059015LA02KT2KT
Ships on Oct 5, 2026
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Sale - Save 19% $ 104.99

This product was last offered at the strikethrough price on
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$ 84.77 USD
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On M52/S52-equipped BMWs, the factory crankcase ventilation (CCV) system is a notorious weak link. Between brittle plastic corrugated hoses that crumble from heat soak and an internal cyclone diaphragm prone to tearing, a failing CCV leads to massive oil consumption, vacuum leaks, and that dreaded "howling" whistle.

This kit addresses these issues with all new components and hardware. Both oil separator hoses, the cyclone separator itself, the mounting grommet, and the retaining bolts are included. Servicing this system is guaranteed to restore performance lost as a result of worn CCV components.

Kit includes:

Cyclone Separator/Crankcase Pressure Regulator Valve High Performance Silicone Breather Hose Return Hose Mounting Grommet Hex Bolt (3)

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OEM Rein Crankcase Vent Hose - F10 F12 F13 M5 M6
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Rein - Corporate Logo
T#:39059240
Part#: 11157843150
In Stock
$ 34.99 USD
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The Crankcase Vent Hose is a crucial component that helps regulate crankcase pressure and prevent oil vapor buildup, ensuring optimal engine performance. Designed as a direct replacement for BMW part number 11157843150, this high-quality vent hose restores proper ventilation to protect vital engine components.
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Bavarian Autosport - Corporate Logo
T#:640207
Part#: 11617501566
In Stock
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$ 26.39 USD
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BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate. Replace this and all the other components of the oil separator system to prevent damage to all the aspects of your engine. As long as you have everything off, you can rest assured that new parts will last and be reliable. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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Packaged by Turner - Corporate Logo
T#:23913949
Part#: CRNKVENTKITKT
In Stock
$ 224.99 USD
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Elevate your S63 4.4L engine's capabilities with our meticulously designed Crank Case Vent Hose Kit. Crafted from premium-grade materials, this kit ensures superior ventilation, mitigating pressure accumulation within the engine, thereby enhancing its overall performance.

Engineered to precise specifications, our kit seamlessly replaces the OEM vent hoses, guaranteeing a perfect fit. By reducing stress on the engine, it prolongs its lifespan and maintains peak functionality. Rely on this kit to provide unparalleled performance and unwavering reliability for your S63 4.4L engine.

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BMW Oil Separator Valve | M60 3.0 / 4.0L
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Rein - Corporate Logo
T#:39059261
Part#: 11151747066
Ships in 2 Business Days
$ 31.99 USD
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BMW Oil Separator Valve | M60 3.0 / 4.0L is a vital component that ensures proper crankcase ventilation by separating oil vapors from blow-by gases, preventing excessive oil consumption and maintaining engine efficiency. Designed for BMW models equipped with the M60 3.0L and 4.0L engines, this oil separator valve helps reduce carbon buildup and extends the life of essential engine components. For optimal results, it is recommended to replace the valve cover and crankcase ventilation system (CCV) when changing the separator valve.

  • Effectively separates oil vapors to prevent excessive oil consumption
  • Helps maintain proper crankcase ventilation for optimal engine performance
  • Reduces carbon buildup and prolongs engine longevity
  • Direct-fit replacement for BMW M60 3.0L and 4.0L engines
  • High-quality materials ensure durability and resistance to engine heat
  • Recommended to replace valve cover and CCV for complete system maintenance

Ensure the longevity and efficiency of your BMW engine by replacing a worn oil separator valve with this high-quality replacement.

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OEM Rein Cylinders 1-4 Crankcase Ventilation Connecting Pipe - E70/1 ...
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Rein - Corporate Logo
T#:402033
Part#: 11157646086
Ships in 3 Business Days
$ 50.99 USD
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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.
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Bavarian Autosport - Corporate Logo
T#:638072
Part#: 11617504536
In Stock
Sale - Save 20% $ 26.99

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$ 21.59 USD
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Sale - Save 20%
$ 26.99

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$ 21.59 USD
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This is the BMW crankcase return line that goes from the intake manifold to the top CCV connecting hose. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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Crankcase Ventilation Hose Kit M54 Engine
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Rein - Corporate Logo
T#:379190
Part#: 11617504535K
Ships in 1 Business Day
$ 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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Intake Manifold Cover (PCV)
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URO - Corporate Logo
T#:373047
Part#: 11617501562
Ships in 1 Business Day
$ 55.99 USD
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An integral part of the emissions system, the PVC valve lets the crank case breathe. This allows proper intake and exhaust flow, resulting in proper running and operation. Often split from underhood heat and age, this vents excess oil into the engine compartment. Replace it now.
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Bavarian Autosport - Corporate Logo
T#:579869
Part#: 54546
In Stock
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This product was last offered at the strikethrough price on
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$ 21.59 USD
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Sale - Save 20%
$ 26.99

This product was last offered at the strikethrough price on
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$ 21.59 USD
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Packaged by Turner - Corporate Logo
T#:24344785
Part#: M54OILSEPKT
In Stock
Sale - Save 23% $ 173.99

This product was last offered at the strikethrough price on
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$ 133.54 USD
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Sale - Save 23%
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$ 133.54 USD
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If you need to perform a complete oil separator system service, this Level 2 kit provides you with all of the main components necessary to service your engine oil separator system. This Level 2 kit includes the following: Oil Separator Hose from oil separator to dipstick tube Hose from oil separator to valve cover Hose from intake manifold back to the connector hose Hose from oil separator up to the intake manifold Throttle body gasket Throttle body inlet boot ICV rubber grommet Oil dipstick tube o-ring seal It is highly recommended to replace the oil dipstick tube with the updated design by BMW as this also a common place for sludge to build up.
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URO Crankcase Vent Hose - 11157522931
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URO - Corporate Logo
T#:26171673
Part#: 11157522931
In Stock
$ 39.79

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

$ 39.77 USD
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$ 39.77 USD
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Connecting the cyclone oil separator to the engine valve cover, this hose is crucial for maintaining optimal engine performance. Over time, exposure to heat from engine components can cause the plastic hose to become brittle, resulting in cracks, tears, or splits. These issues can lead to vacuum and oil leaks, triggering a check engine light.

  • High-quality replacement for BMW crankcase vent hose
  • Ensures optimal engine performance
  • Resistant to heat and wear
  • Helps prevent vacuum and oil leaks
  • Easy to install
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URO Oil Separator Valve - BMW E60 E90 Z4 N52
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URO - Corporate Logo
T#:592960
Part#: 11617531423
In Stock
$ 57.12 USD
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$ 57.12 USD
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he crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate.
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Rein Crank Case Vent Hose - E60, E82, E83, E88, E90, E91, E92, E93, Z...
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Rein - Corporate Logo
T#:402018
Part#: 11157559528
In Stock
$ 48.99 USD
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Over time this hose can become clogged and blocked up causing running problems. This is a direct factory replacement for the PCV hose.

Rein - Crank Case Breather Pipe
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Rein - Corporate Logo
T#:34080765
Part#: 11151705301
In Stock
$ 21.99 USD
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The Rein Crank Case Breather Pipe is a high-quality replacement part designed specifically for BMW models, ensuring proper engine ventilation and maintaining optimal performance. This crucial component prevents pressure build-up in the crankcase, reducing the risk of oil leaks and protecting vital engine parts. Manufactured to meet or exceed OEM standards, the Rein Crank Case Breather Pipe guarantees a perfect fit and long-lasting durability. Available through Turner Motorsport, this pipe is the ideal solution for BMW owners looking to restore or upgrade their engine’s ventilation system.

  • Designed for BMW models to ensure perfect fit and compatibility
  • Prevents crankcase pressure build-up, reducing the risk of oil leaks
  • Protects engine components from damage due to excess pressure
  • Made from high-quality, durable materials for long-lasting performance
  • Direct-fit replacement for easy and hassle-free installation
  • Meets or exceeds OEM specifications for reliable engine performance

Upgrade your BMW’s engine ventilation system with the Rein Crank Case Breather Pipe, ensuring smooth performance and protecting against costly repairs.

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Rein Crankcase Vent Pipe - Cylinders 1-4 - E70, E71, F01, F02, F07, F...
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Rein - Corporate Logo
T#:591595
Part#: 11157575640
In Stock
$ 42.99 USD
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Replace your damaged crank vent pipe
Rein Crankcase Vent Hose
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Rein - Corporate Logo
T#:17804807
Part#: 11157522931
Ships in 1 Business Day
$ 44.99 USD
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Manufactured with high-quality materials to withstand heat, dirt, oil, and other debris.
BMW N63 4.4L Vent Pipe - Each
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Rein - Corporate Logo
T#:7244416
Part#: 11158647961
In Stock
$ 327.99

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

$ 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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Crankcase Vent Valve - E36 318i/is/ti, Z3 1.9
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Rein - Corporate Logo
T#:7968540
Part#: 11157501567
Ships in 1 Business Day
$ 31.99 USD
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This crank case vent valve (CCV) / oil separator / PCV valve helps to trap oil from the crank case. If this unit becomes plugged or develops a leak it can lead to rough idle or driveability issues. This item fits the following BMWs: 1992-1998 E36 BMW 318i 318is 318ti 318ic 1997-2002 Z3 BMW Z3 1.9
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Bavarian Autosport - Corporate Logo
T#:640206
Part#: 11617501563
In Stock
Sale - Save 20% $ 47.99

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$ 38.39 USD
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Sale - Save 20%
$ 47.99

This product was last offered at the strikethrough price on
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$ 38.39 USD
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An integral part of the emissions system, the PCV valve lets the crankcase breathe. This allows proper intake and exhaust flow, resulting in proper running and operation. When the crankcase vent valve fails it can cause excessive oil consumption, engine fault codes, and poor idle. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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Rein Crankcase Vent Pipe - Cylinders 5-8 - E70, E71, F01, F02, F07, F...
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Rein - Corporate Logo
T#:591596
Part#: 11157575641
In Stock
$ 45.99

This product was last offered at the strikethrough price on
04-30-2026

$ 44.99 USD
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$ 44.99 USD
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Replace your damaged crank vent pipe

Suction Pump
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URO - Corporate Logo
T#:377591
Part#: 11617545382
In Stock
$ 59.62 USD
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A common source for vacuum leaks

Packaged by Turner - Corporate Logo
T#:555298
Part#: 11617501566KT6
In Stock
Sale - Save 19% $ 181.99

This product was last offered at the strikethrough price on
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$ 147.02 USD
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The plastic hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the plastic components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, mounting grommet, and hardware.

Fits the following BMWs:
2000-2003 E39 BMW 530i

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PCV Vent Pipe
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Rein - Corporate Logo
T#:594381
Part#: 11127588417
Ships in 3 Business Days
$ 84.99

This product was last offered at the strikethrough price on
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$ 59.00 USD
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$ 59.00 USD
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Connects to the PCV outlet on the valve cover

Oil Separator Hose
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URO - Corporate Logo
T#:361564
Part#: 11151703775
Ships in 1 Business Day
$ 24.99 USD
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$ 24.99 USD
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Runs from the valve cover to PCV valve
Vent Hose
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Rein - Corporate Logo
T#:594296
Part#: 11157513756
Ships in 3 Business Days
$ 35.75

This product was last offered at the strikethrough price on
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$ 30.99 USD
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$ 30.99 USD
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Connects the intake manifold to the valve cover

Rein Crankcase Ventilation Hose - E60, E61, E90, E91
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Rein - Corporate Logo
T#:591594
Part#: 11157567802
Ships in 3 Business Days
$ 74.99 USD
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$ 74.99 USD
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From oil separator to oil pan vent tube

"Cold Climate" Oil Separator Kit
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URO - Corporate Logo
T#:377838
Part#: 11617534237
Ships in 1 Business Day
$ 74.99 USD
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$ 74.99 USD
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URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts.
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Upper Oil Separator Vent Tube
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URO - Corporate Logo
T#:362022
Part#: 11617504535
Ships in 1 Business Day
$ 20.99 USD
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$ 20.99 USD
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The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate.
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Upper Oil Separator Vent Tube
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Rein - Corporate Logo
T#:378292
Part#: 11617504535
Ships in 1 Business Day
$ 22.99 USD
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$ 22.99 USD
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Runs from the top of the oil separator up to intake manifold.


Crankcase Pressure Regulator Valve
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URO - Corporate Logo
T#:373032
Part#: 11617501566
Ships in 1 Business Day
$ 25.99 USD
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$ 25.99 USD
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Commonly referred to as the "oil separator" or PCV
URO Oil Separator Valve - E38, E39
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URO - Corporate Logo
T#:43648857
Part#: 11151705272
Ships in 1 Business Day
$ 30.99 USD
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$ 30.99 USD
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BMW has an issue with oil separators freezing in cold weather if the engine is not fully warmed up during driving. Common symptoms are a howling noise followed by oil leaks. Crankcase breather valve used to purge the oil vapor from the engine block into the valve cover. This valve has 4 hoses connected to it, running to dipstick, valve cover, air intake.
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URO Crankcase Ventilation Return Hose - 11157567801
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URO - Corporate Logo
T#:26171675
Part#: 11157567801
Ships in 1 Business Day
$ 39.99 USD
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For your BMW's optimal performance, ensure the functionality of the hose connecting the oil dipstick to the crankcase vent valve. Positioned below the intake manifold, this hose is susceptible to clogging with oil film and condensation, leading to potential failure over time. Cracks and swelling in old hoses can result in oil and vacuum leaks, compromising engine performance.

  • Essential component for BMW engine functionality
  • Prevents clogging and potential hose failure
  • Minimizes oil and vacuum leaks
  • Convenient replacement when replacing crankcase vent valve
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OEM Rein Oil Separator Vent Hose - E60/61 E90/91 Z4
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Rein - Corporate Logo
T#:13029
Part#: 11617559530
Ships in 3 Business Days
$ 66.99

This product was last offered at the strikethrough price on
05-07-2026

$ 43.99 USD
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$ 43.99 USD
Free Shipping on orders $49 and up
BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate. Replace this and all the other components of the oil separator system to prevent damage to all the aspects of your engine. As long as you have everything off, you can rest assured that new parts will last and be reliable.
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Upper Oil Separator Vent Tube
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:552486
Part#: 11617533399
Ships in 1-2 days
$ 35.99 USD
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Runs from the top of the oil separator up to rear of the intake manifold.
OEM Rein CCV Hose - E60/1/3/4/5/6 E70 N62
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:402019
Part#: 11617563477
Ships in 3 Business Days
$ 109.99 USD
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$ 109.99 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.

Bavarian Autosport - Corporate Logo
T#:639843
Part#: 11617501562
Special Order: No Guaranteed ETA
Sale - Save 15% $ 59.99

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

$ 50.99 USD
Free Shipping on orders $49 and up
Sale - Save 15%
$ 59.99

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

$ 50.99 USD
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An integral part of the emissions system, the PVC valve lets the crankcase breathe. This allows proper intake and exhaust flow, resulting in proper running and operation. Often split from underhood heat and age, this vents excess oil into the engine compartment. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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Rein Crank Case Ventilation Valve - Priced Each
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:17738377
Part#: 11158647299
Ships on Oct 9, 2026
$ 79.99

This product was last offered at the strikethrough price on
03-26-2026

$ 73.99 USD
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$ 73.99 USD
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Rein's OE quality breather hose helps prevent pressure build-up in the engine.

Packaged by Turner - Corporate Logo
T#:555299
Part#: 11151406788KT3
Back Ordered
$ 326.99

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

$ 325.99 USD
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$ 325.99 USD
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The rubber hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, mounting grommet, and hardware.

Fits the following BMWs:
1998-2003 E39 BMW M5

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Packaged by Turner - Corporate Logo
T#:15710823
Part#: E46M5411_61KT
In Stock
Sale - Save 24% $ 123.99

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

$ 93.71 USD
Free Shipping on orders $49 and up
Sale - Save 24%
$ 123.99

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

$ 93.71 USD
Free Shipping on orders $49 and up
Replace all the components of the oil separator system together to prevent damage to all the aspects of your engine. As long as you have everything off, you can rest assured that new parts will last and be reliable. BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate. ur Level 1 kit includes the following; Oil separator Hose from oil separator to dipstick tube Hose from oil separator to valve cover Hose from intake manifold back to the connector hose Hose from oil separator up to the intake manifold
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Engine Vent Hose 11151740393
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:6703
Part#: 11151740393
Ships on Oct 5, 2026
$ 5.89 USD
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ENGINE VENT HOSE 11151740393
Bavarian Autosport - Corporate Logo
T#:579880
Part#: 55080
In Stock
Sale - Save 20% $ 24.99

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

$ 19.99 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 24.99

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

$ 19.99 USD
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Cold climate version for extra insulation! Fits all E46 and Z4 chassis equipped with an M54 engine.


Bavarian Autosport - Corporate Logo
T#:640502
Part#: 11617504535
In Stock
Sale - Save 20% $ 24.99

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

$ 19.99 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 24.99

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

$ 19.99 USD
Free Shipping on orders $49 and up
Runs from the top of the oil separator up to rear of the intake manifold. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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Rein - Corporate Logo
T#:46478579
Part#: ABH0263
In Stock
$ 23.99 USD
Free Shipping on orders $49 and up
$ 23.99 USD
Free Shipping on orders $49 and up
BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate. Replace this and all the other components of the oil separator system to prevent damage to all the aspects of your engine. As long as you have everything off, you can rest assured that new parts will last and be reliable.
Show More Show Less