Find Parts That Fit Your Vehicle

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.

Sub-Categories

Sort By:

Burger Motorsports - Corporate Logo
T#:38587650
Part#: N54PCVVR
In Stock
$ 40.00 USD
Free Shipping on orders $49 and up
The BMS N54 Upgraded Replacement PCV Valve is a high-performance upgrade designed to enhance crankcase ventilation and minimize excessive blow-by in BMW N54 engines. Unlike the stock PCV valve, which can degrade over time and lead to oil consumption or boost leaks, this upgraded version provides superior sealing and long-term durability. ### Key Features: - **Direct-Fit Replacement** – Designed for an exact fit, ensuring hassle-free installation. - **Optimized Ventilation** – Improves crankcase pressure management, reducing oil blow-by and deposits. - **Enhanced Durability** – Constructed from premium materials to withstand high-boost applications and prolonged use. - **Boost Leak Prevention** – Delivers a tighter seal than the factory valve, preventing power loss. - **Ideal for Tuned Engines** – A critical upgrade for N54-powered vehicles running increased boost levels. Upgrade your N54’s crankcase ventilation system with the BMS Upgraded PCV Valve to ensure maximum performance, reliability, and engine longevity.
Show More Show Less
Packaged by Turner - Corporate Logo
T#:557341
Part#: 11111318185TMSKT
In Stock
Sale - Save 2% $ 85.93

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

$ 84.32 USD
Free Shipping
Sale - Save 2%
$ 85.93

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

$ 84.32 USD
Free Shipping

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. 

Show More Show Less
Vargas Turbo Technologies - Corporate Logo
T#:389684
Part#: VTT-N54-PCV
In Stock
$ 68.99 USD
Free Shipping on orders $49 and up
The crankcase oil vent system on the N52/N54 is one of its weakest and cheaply designed systems. We see crankcase vent issues on even stock engines but with more boost the problems are exponential. This Vargas upgraded PCV valve, and an oil catch can, are what the N54 engine needs and may alleviate most of your oil and boost leak issues. The PCV valve is supposed to let oil either return to the oil pan or pass through the intake manifold and get burned up in the combustion chamber. However, BMW used a weak plastic vent valve that doesn't seal well when under boost. Instead of  closing and venting the oil out of the intake, it's forced through this valve and into the intake and coating your valves with oil residue and carbon. Most boost equals more oil forcing its way by. This upgraded N54 PCV valve uses higher grade materials, including aluminum, to provide a better seal and prevent oil from entering the intake. It's an easy install and a must-have item when considering any turbo work.
Show More Show Less

Febi-Bilstein "Cold Climate" CCV Kit - 11617533400S1
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:28304463
Part#: 11617533400S1
Ships in 2 Business Days
$ 238.99

This product was last offered at the strikethrough price on
04-15-2026

$ 199.99 USD
Free Shipping on orders $49 and up
$ 199.99 USD
Free Shipping on orders $49 and up

After the introduction of the M52TU/M54 engines, BMW observed an uptick in CCV-related issues, especially in cold regions. Vehicles operating in extremely low temperatures often encountered a blockage in the CCV dipstick hose, leading to elevated crankcase pressure and visible blue smoke from the exhaust. To address this issue, BMW introduced cold climate-specific hoses with foam insulation, preventing condensation and facilitating quicker oil warm-up. This kit incorporates top-notch reproduction cold climate hoses to ensure optimal CCV performance across all weather conditions.

The crankcase ventilation valve, known as the oil separator, PCV, CCV, or crankcase pressure regulator valve, plays a vital role in redirecting oil from your vehicle's intake system back into the engine oil pan. This system comprises numerous plastic and rubber hoses, prone to damage due to prolonged exposure to chemicals and heat.

Designed to tackle or prevent impending CCV system failures, this kit includes four foam-insulated hoses made from durable plastic capable of withstanding heat fluctuations and chemical exposure. Additionally, a new ventilation valve is included for a comprehensive and long-lasting repair solution.

Signs indicating the need for crankcase ventilation system replacement include:

Whistling sounds from the intake manifold, caused by crankcase pressure venting through holes in the CCV hoses. Blue smoke emitting from the tailpipe, indicating oil consumption. Excessive oil usage. Milky or yellowish buildup under the oil cap, suggesting condensation due to ventilation valve malfunction. If you're experiencing misfires, lean fuel codes, decreased fuel efficiency, or noticeable oil consumption, it's advisable to overhaul your crankcase ventilation system. Opt for this reliable system from Febi-Bilstein for a repair that meets factory standards and ensures consistent performance.

Show More Show Less

Vargas Turbo Technologies - Corporate Logo
T#:4813265
Part#: VTT-B58-PCV-CAP
Back Ordered
$ 149.99 USD
Free Shipping
$ 149.99 USD
Free Shipping
Vargas has developed a solution to problematic PCV systems! Stock diaphragms on the gen-1 B58 Valve cover are fragile and can crack or tear over time. This can cause loss of crankcase vacuum and smoking. The VTT PCV cap replaces the factory plastic cap with a billet aluminum piece which uses a Billet Banjo fitting, and VTT's Vaccum/Boost adapter to move vacuum directly from the head ports to the manifold. This cap will also allow you to run a catch can on the low side if desired. VTT Recommends using this cap alongside their High Side Catch Can and crankcase breather for maximum efficiency. Installation is as simple as popping the stock cap off, removing the diaphragm, and placing the VTT components in place. Kit Includes: One Billet PCV Cap One Billet Banjo Fitting One Vaccum/Boost adapter One line with built-in check valve
Show More Show Less
Febi - Corporate Logo
T#:28337855
Part#: 11151703484KIT
Ships in 1-2 days
$ 108.99

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

$ 82.99 USD
Free Shipping on orders $49 and up
$ 82.99 USD
Free Shipping on orders $49 and up

Rubber breather pipes in various BMW applications are susceptible to cracking. Over time, engine heat and weather conditions can weaken these hoses, leading to breaks or leaks. This results in significant vacuum leaks that can severely affect engine performance.

Moreover, BMW faces a problem with oil separators freezing in cold weather, particularly if the engine isn't adequately warmed up during driving. Typical signs include a howling noise and subsequent oil leaks.

Show More Show Less

Packaged by Turner - Corporate Logo
T#:51356040
Part#: 059015LA02KT2KT
Ships on Oct 5, 2026
New Item
Sale - Save 19% $ 104.99

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

$ 84.77 USD
Free Shipping on orders $49 and up
Sale - Save 19%
$ 104.99

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

$ 84.77 USD
Free Shipping on orders $49 and up

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)

Show More Show Less
Packaged by Turner - Corporate Logo
T#:23913949
Part#: CRNKVENTKITKT
In Stock
$ 224.99 USD
Free Shipping on orders $49 and up

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.

Show More Show Less

Vargas Turbo Technologies - Corporate Logo
T#:597641
Part#: VTT-CHECK-2
Ships in 2 Business Days
$ 36.99 USD
Free Shipping
$ 36.99 USD
Free Shipping
Vargas Turbo has you covered when you are installing a custom turbo setup. With all of the adapters you need and all the valves necessary, the only real limiting factor is your imagination!

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
05-03-2026

$ 133.54 USD
Free Shipping on orders $49 and up
Sale - Save 23%
$ 173.99

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

$ 133.54 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
Vargas Turbo Technologies - Corporate Logo
T#:557962
Part#: VTT-FLAPPER-DELE
Ships in 10 Business Days
$ 57.99 USD
Free Shipping
$ 57.99 USD
Free Shipping

Vargas Turbo has you covered when you are installing a custom turbo setup. With all of the adapters you need and all the valves necessary, the only real limiting factor is your imagination!

The VTT PCV Flapper delete is used to get rid of the factory flapper, and add a -10 fitting on N54 powered vehicles. This will allow you to run a single or dual external catch can, or your own custom set up.

This fitting is made from 6061-T6 aircraft aluminum anodized black and comes with O-ring, and a stainless steel holding clip.

This part fits the following BMW engines:
2006-2012 N54

Show More Show Less
Burger Motorsports - Corporate Logo
T#:21045538
Part#: BMS-CC-GB58
Ships in 1 Business Day
Starting at $ 248.00 USD
Free Shipping on orders $49 and up
Starting at $ 248.00 USD
Free Shipping on orders $49 and up
It's no secret that the B58 BMW turbo motors can suffer from oil control problems causing the oil to blow through and coat the intercooler and charge piping, gunking up intake valves and the VANOS system, lowering the effective octane, and generally degrading engine performance. The higher your boost levels the more apparent these problems become. The solution to this problem has finally arrived. The BMS oil catch can. While there are other catch cans on the market they all fall short in various areas. Some are mounted on the hot/turbo side of the motor preventing proper vapor condensation. Others utilize hoses that are too small and runs that are too long to allow proper PCV ventilation causing internal motor/ring sealing issues. Some have insufficient or no internal baffle system while others have internal baffles systems that are too restrictive. Some even bypass the PCV system all together venting crankcase gas and odor to the atmosphere. Most are simply repackaged oil catch cans from smaller/lower power motors shoehorned into place in the turbo BMW engine bay. To solve these problems Burger Motorsports designed their oil catch can kit from the ground up specifically for the B58 turbo BMW application. It features 100% CNC machining with zero welding for a precision fit and long life. The can itself is guaranteed for the life of the vehicle. The hoses exceed the OEM PCV piping in diameter and that flow rate is maintained throughout the entire oil catch can ensuring no excessive crankcase pressure buildup. The BMS OCC retains the factory fully closed loop PCV operation preventing any PCV vapor from leaking to atmosphere. The mounting locations are selected to minimize the line length, allow more efficient operation, and retain a stealth look. Install takes around 20 minutes, includes all required hardware, and is 100% reversible. Simply unscrew the base of the can or use the drain plug to safely dispose of captured oil with the rest of your used motor oil during oil changes. Made in the USA. KIT INCLUDES (1) BMS N54 Oil Catch Can (1) Billet B58 bracket (1) 90º billet fitting/nipple (1) Custom Silicone inlet hose (1) 3.5" Straight hose (2) Stainless steel bracket screws #10-32 x 1/2" internal hex socket head Includes BMS intake silencer delete for installation with factory intake.
Show More Show Less


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
05-03-2026

$ 147.02 USD
Free Shipping
Sale - Save 19%
$ 181.99

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

$ 147.02 USD
Free Shipping

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

Show More Show Less
Vargas Turbo Technologies - Corporate Logo
T#:557954
Part#: VTT-CHECK-1
Ships in 1 Business Day
$ 36.99 USD
Free Shipping
$ 36.99 USD
Free Shipping

Vargas Turbo has you covered when you are installing a custom turbo setup. With all of the adapters you need and all the valves necessary, the only real limiting factor is your imagination!

This is a 1/2" (fits -8AN hos perfectly as well) CNC Billet check valve that can be used for a variety of uses including a vacuum/boost check valve when removing the stock PCV system, and still wanting to run the vacuum to the crankcase. Rated at over 100 psi, with a cracking psi of .25psi.

This part fits the following BMW engines:
2006-2012 N54

Show More Show Less
Crankcase Vent Return Hose - E46 E39 E60 Z3
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:12449
Part#: 11617504536
Ships in 2 Business Days
$ 31.99 USD
Free Shipping on orders $49 and up
$ 31.99 USD
Free Shipping on orders $49 and up

This is the BMW crankcase return line that goes from the intake manifold to the top CCV connecting hose. We also offer a complete CCV repair kit
Since the late 1800’s Febi has been fabricating replacement metal parts. This history is self evident in the quality and vast amount of applications they service. With more than 34,000 repair solutions for cars and commercial vehicles you can be sure Febi has you covered.


This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
1997-2003 E39 BMW 525i 528i 530i
2004-2010 E60 BMW 525i 530i
2004-2005 E83 BMW X3 2.5i X3 3.0i X3 3.0si
2000-2006 E53 BMW X5 3.0i
1/2000-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i
2003-2005 E85 BMW Z4 2.5i Z4 3.0i

Show More Show Less

Oil Separator Valve
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:597181
Part#: 11151705272
In Stock
$ 48.59

This product was last offered at the strikethrough price on
05-29-2026

$ 43.40 USD
Free Shipping on orders $49 and up
$ 43.40 USD
Free Shipping on orders $49 and up

Vargas Turbo Technologies - Corporate Logo
T#:642075
Part#: VTT-10ORB
Ships in 10 Business Days
$ 23.99 USD
Free Shipping
$ 23.99 USD
Free Shipping
Crankcase Oil Separator Valve - E46 E39 E60 X3 X5 Z3 Z4
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:2855
Part#: 11617501566
Ships on Nov 11, 2026
$ 48.99 USD
Free Shipping on orders $49 and up
$ 48.99 USD
Free Shipping on orders $49 and up
This Crankcase Oil Separator Valve fits BMWs with the M52tu or M54 6 cylinder engine including E46 323i 325i 328i 330i E39 525i 528i 530i E60 525i 530i X3 2.5i 3.0i X5 3.0i Z3 2.5 2.8 3.0i Z4 2.5i 3.0i. It is fairly common for this valve to become plugged with sludge which can create rough idle and excessive oil consumption.
Since the late 1800’s Febi has been fabricating replacement metal parts. This history is self evident in the quality and vast amount of applications they service. With more than 34,000 repair solutions for cars and commercial vehicles you can be sure Febi has you covered.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 328i 328ci 330i 330ci 330xi
1999-2005 E46 BMW 325i 325ci 325xi - only with M54 engine
1999-2003 E39 BMW 525i 528i 530i
2004-2005 E60 BMW 525i 525xi 530i 530xi
2004-2006 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8i Z3 3.0i
2003-2006 E85 BMW Z4 2.5i Z4 3.0i
Show More Show Less

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
Free Shipping
$ 325.99 USD
Free Shipping

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

Show More Show Less
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
Show More Show Less

Packaged by Turner - Corporate Logo
T#:15744065
Part#: 114317400450-KT
In Stock
Sale - Save 41% $ 231.99

This product was last offered at the strikethrough price on
06-15-2026

$ 137.46 USD
Free Shipping on orders $49 and up
Sale - Save 41%
$ 231.99

This product was last offered at the strikethrough price on
06-15-2026

$ 137.46 USD
Free Shipping on orders $49 and up
If you are ready to perform a truly complete oil separator system service, our Level 2 kit provides you with all of our Level 1 kit components plus a throttle body gasket, throttle body inlet boot, ICV grommet, and dipstick tube o-ring. Our Level 2 Cold Climate kit includes the following: Oil separator - BMW cold climate recommended Hose from oil separator to dipstick tube - BMW cold climate recommended 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.
Show More Show Less

Febi - Corporate Logo
T#:359557
Part#: 11157532629
Ships in 1-2 days
$ 23.99

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

$ 15.99 USD
Free Shipping on orders $49 and up
$ 15.99 USD
Free Shipping on orders $49 and up
From oil separator to dipstick tube
Packaged by Turner - Corporate Logo
T#:56291074
Part#: 11158636540KT2
Ships in 3 Business Days
New Item
$ 429.67 USD
Free Shipping on orders $49 and up
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
Show More Show Less
BMW Breather Valve
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:17339405
Part#: 11127537733
In Stock at Vendor
$ 27.99

This product was last offered at the strikethrough price on
05-29-2026

$ 19.99 USD
$ 19.99 USD
Are you experiencing a slight loss of power? This pressure regulator valve repair kit could easily be the culprit. With a bad gasket or weak spring you could be losing pressure, resulting in less power.
Show More Show Less


Febi Oil Separator - E53
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:363700
Part#: 11151705237
In Stock at Vendor
$ 21.99

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

$ 20.99 USD
Free Shipping on orders $49 and up
$ 20.99 USD
Free Shipping on orders $49 and up
Critical crankcase ventilation cyclone separator - great replacement or custom install!
Febi - Corporate Logo
T#:6707
Part#: 11157532649
Ships in 2 Business Days
$ 19.12

This product was last offered at the strikethrough price on
05-29-2026

$ 17.19 USD
Free Shipping on orders $49 and up
$ 17.19 USD
Free Shipping on orders $49 and up
ENGINE VENT HOSE 11157532649
Packaged by Turner - Corporate Logo
T#:221962
Part#: TMS221962
Ships in 3 Business Days
$ 458.99 USD
Free Shipping
$ 458.99 USD
Free Shipping
The BMW N52 engine was deisgned with a crankcase vent system that relies on a heated oil separator valve to separate vapor from the liquid oil. Under ideal circumstances, the oil vapor would pass back into the intake and get burned up during normal combustion. The liquid oil would follow a path back down into the oil pan and be reused. This system is environmentally friendly but plagued with problems. The heating elements can fail or oil and carbon particles can block the oil separator valve. With no escape, the oil will continue to pool and collect in the valve cover or make its way into the combustion chamber leading to excessive oil consumption, blue smoke from the exhaust, idle and running issues. These issues are worse in colder climates where the freezing temperatures create an oil sludge condition that is impossible to clear. The plastic hoses can become brittle and crack which leads to vacuum leaks and oil leaks. Thankfully, the CCV is replaceable on the early N52 engines (2006 and some 2007 models) and should be inspected during a major service and any time the valve cover is off. Oil can also back up into the throttle body, which is easier to check than the oil separator itself. Later N52 engines do not have a serviceable oil vent as it is integrated into the valve cover and not a separate part.

This is a kit containing the oil separator, the vent hoses, and the intake manifold gaskets that are done during a typical oil separator replacement. Complete kit includes:
  • 11617531423, Genuine BMW oil separator
  • 11617559530, vent hose
  • 11157522931, oil separator hose
  • 11157567801, return hose
  • 11157537701, extraction hose
  • 11617547242, intake manifold gaskets (set of 6)
    The intake manifold must be removed to access the oil separator so new profile gaskets are included. We also recommend (but not required) a new oil separator fitting on the intake manifold because it's one of the heated elements that vaporizes the oil as it enters the intake.

    The oil separator can be replaced on its own but for a complete service we also recommend replacing the oil separator hoses and cleaning the valve cover. Any valve cover or intake manifold work should include a new oil separator valve.

    This kit fits the following BMWs:
    -10/2005 E90 BMW 325xi 330xi - Sedan
    -10/2005 E91 BMW 325xi - Wagon
    -10/2005 E60 BMW 525xi 530xi
  • Show More Show Less

    Febi Crankcase Ventilation Hose - E34
    We Price Match - Give Us A Call or Chat!
    Febi - Corporate Logo
    T#:381678
    Part#: 11151708801
    Ships in 1 Business Day
    $ 11.99

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

    $ 9.99 USD
    Free Shipping on orders $49 and up
    $ 9.99 USD
    Free Shipping on orders $49 and up
    Prone to cracking and breaking.

    Vargas Turbo Technologies - Corporate Logo
    T#:557961
    Part#: VTT-PCV-ADAPTER
    Ships in 10 Business Days
    $ 145.99 USD
    Free Shipping
    $ 145.99 USD
    Free Shipping

    Vargas Turbo has you covered when you are installing a custom turbo setup. With all of the adapters you need and all the valves necessary, the only real limiting factor is your imagination!

    This is the adapter fitting that is required to convert your N54 to external PCV if you want to keep your crankcase under vacuum at idle, and anytime you have a vacuum condition in your intake manifold. They are made from 6061-T6 with black anodizing for a long-lasting finish. Includes complete adapter, with all o-rings, and retaining clip.

    This must be used in conjunction with  the Vargas billet check valve, and PCV delete fitting or requires plugging of the intake PCV ports. Installs inline on the throttle body, and adds a -8AN male to adapt to a catch cans, or any custom set up.

    Made from 6061-T6 with black anodizing for a long-lasting finish. Includes complete adapter, with all o-rings, and retaining clip

    This part fits the following BMW engines: 
    2006-2012 N54

     

    Show More Show Less
    Febi - Corporate Logo
    T#:38452821
    Part#: 11157527570
    Special Order: No Guaranteed ETA
    $ 93.99 USD
    $ 93.99 USD
    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.
    Show More Show Less

    Packaged by Turner - Corporate Logo
    T#:555304
    Part#: 11157840446KT9
    Ships in 3 Business Days
    $ 426.99 USD
    Free Shipping
    $ 426.99 USD
    Free Shipping

    The 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, and hardware.

    Fits the following BMWs:
    09/2004-2006 E46 BMW M3 - Manual Transmission

    Show More Show Less
    Packaged by Turner - Corporate Logo
    T#:555305
    Part#: 11157840446KT10
    Ships in 3 Business Days
    $ 296.99 USD
    Free Shipping
    $ 296.99 USD
    Free Shipping

    The 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, and hardware.

    Fits the following BMWs:
    2001-09/2004 E46 BMW M3 - Manual Transmission

    Show More Show Less

    Packaged by Turner - Corporate Logo
    T#:555308
    Part#: 11151705237KT1
    Back Ordered
    Sale - Save 11% $ 208.99

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

    $ 186.75 USD
    Free Shipping
    Sale - Save 11%
    $ 208.99

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

    $ 186.75 USD
    Free Shipping

    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, and hardware.

    Fits the following BMWs:
    1999-2006 E53 BMW with M62 4.4L 4.6L

    Show More Show Less