Oil Separation & Breather System for BMW 3 Series E90 (2006-2011)

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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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M57 Upgraded Silicone PCV Hose - E90 335d, E70 35d
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Turner Motorsport - Corporate Logo
T#:39734496
Part#: 056926LA01
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Turner Motorsport Silicone PCV Hose for BMW M57

Upgrade your BMW M57 engine with our Silicone PCV Hose, a premium replacement for the fragile, failure-prone factory hose. Over time, the stock rubber hose deteriorates due to constant exposure to heat and oil, leading to cracks and leaks. Our solution? A high-quality silicone hose engineered for superior durability and long-term reliability.

To further enhance performance, we’ve lined the hose with fluorosilicone, providing exceptional resistance to oil and chemical degradation. Designed in-house using advanced CAD modeling and 3D scanning, this hose offers a precise OEM fit while eliminating the common weaknesses of rubber construction.

Each kit includes stainless steel hose clamps for a secure, hassle-free installation. Whether you’re replacing a worn-out PCV hose or upgrading for added peace of mind, this premium solution ensures your BMW M57 runs smoothly and efficiently for years to come.

Features:

Direct OEM Fit – Retains factory hose dimensions while eliminating reliability issues.
High-Performance Silicone – Resists heat-related wear for long-lasting durability.
4-Ply Fluorosilicone Lining – Superior protection against oil and chemical exposure.
Stainless Steel Clamps Included – Secure installation and extended service life.
Give your BMW M57 the reliability it deserves—upgrade to the Turner Motorsport Silicone PCV Hose today!

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Crankcase Oil Separator and Vent Hose Kit - E90 325xi/330xi, E60 525x...
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Turner Motorsport - Corporate Logo
T#:221961
Part#: TMS221961
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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
  • 11157567802, 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
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    Upgraded Silicone CCV Hose - (11157522931) - N52
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    Turner Motorsport - Corporate Logo
    T#:46203577
    Part#: 058973LA02
    In Stock
    $ 101.99

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    Due to weak plastic construction, the factory plastic crankcase ventilation breather hose is known to fail. After years of exposure to piping-hot engine bay temperatures and chemical-laden oil vapors, the corrugated plastic tubing can crack, crumble, or fail altogether.

    We set out to bulletproof your N52 CCV system with a durable silicone breather hose, designed to provide a comprehensive upgrade and permanent replacement for the factory plastic hose. By replacing the flimsy, heat-hardened OEM plastic hose with a four-ply fluorosilicone hose, you'll experience peace of mind knowing your N52 is free from the inevitable return of oil leaks, vacuum leaks, and drivability concerns that would have been.

    This breather hose is found at the front of the engine, and is used to connect the oil separator to the valve cover. It replaces OEM part number 11157522931.

    Features:

    Silicone construction ensures a durable replacement that is sure to outlast OE plastic
    Designed as a direct replacement for the factory breather hose
    Retains heating function and OE electrical connector
    Design:

    Four-ply wire-reinforced fluorosilicone hose is designed to resist degradation due to exposure to oil vapors
    O-rings are pre-installed in OE connectors for a lasting seal
    Includes pre-installed zinc-coated hose clamps for durability and corrosion resistance
    Product Development:

    Our Silicone CCV Hose Upgrade was designed, engineered, tested, and quality inspected by our Research and Development team in our Wadsworth, Ohio, facility. We strive for the highest level of precision and quality through leading-edge product development technology, including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modelling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.

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    Turner Motorsport Silicone Oil Separator Hose Upgrade (11617559530) -...
    For Vehicles with a Production Date from 10/2005
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    Turner Motorsport - Corporate Logo
    T#:46203579
    Part#: 058981LA02
    In Stock
    $ 101.99

    This product was last offered at the strikethrough price on
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    $ 38.99 USD
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    Due to weak plastic construction, the factory plastic crankcase ventilation breather hose is known to fail. After years of exposure to piping-hot engine bay temperatures and chemical-laden oil vapors, the corrugated plastic tubing can crack, crumble, or fail altogether.

    Upgrade your N52 CCV system with this durable silicone oil separator hose, designed to provide a comprehensive upgrade and permanent replacement for the factory plastic hose. By replacing the flimsy, heat-hardened OEM plastic hose with a four-ply fluorosilicone hose from Turner Motorsport, you'll experience peace of mind knowing your N52 is free from the inevitable return of oil leaks, vacuum leaks, and drivability concerns that would have been.

    This hose is located underneath the intake manifold and is used to connect the oil separator to the induction tract. It replaces OEM part number 11617559530.

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    BMS N54 Upgraded Replacement PCV Valve For BMW
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    Burger Motorsports - Corporate Logo
    T#:38587650
    Part#: N54PCVVR
    In Stock
    $ 40.00 USD
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    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.
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    Genuine BMW PCV Non-return Valve - E9X M3, E6X M5 M6
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    Genuine BMW - Corporate Logo
    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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    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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    Bremmen Crankcase Vent Hose - E60 E70 E82/88 E9X N52 3.0L
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    Bremmen Parts - Corporate Logo
    T#:640155
    Part#: 11157559528
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    This product was last offered at the strikethrough price on
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    This valve cover vent hose helps to vent the crankcase fumes on BMW's with the N51 / N52 6 cylinder engines. If replacing the valve cover, we recommend purchasing this item as well as it often will break while removing it from the valve cover.
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    BMW N54 3.0L Blow-By Vent Hose
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    Rein - Corporate Logo
    T#:594297
    Part#: 11157553949
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    $ 38.34 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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    E82 135i N54, E9X 335 N54, E60 535 Vargas Upgraded PCV Valve ...
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    Vargas Turbo Technologies - Corporate Logo
    T#:389684
    Part#: VTT-N54-PCV
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    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.
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    Blow-By Vent Hose
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    Bremmen Parts - Corporate Logo
    T#:30629687
    Part#: 11157553949
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    Genuine BMW Crankcase Pressure Regulator Valve - E9X M3 S65
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    Genuine BMW - Corporate Logo
    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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    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.
    Rein Crankcase Ventilation Return Pipe - E60, E90, Z4
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    Rein - Corporate Logo
    T#:402081
    Part#: 11157567801
    In Stock at Vendor
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    Located under intake manifold


    Angle Connector With Heating Element
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    MTC - Corporate Logo
    T#:556608
    Part#: 11618638014
    In Stock
    $ 39.99 USD
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    Being not only a connecting piece for the PCV line to the intake manifold but a heating element to prevent blockage it is possible to short out this piece. Easy to replace, prevent damage by getting a new piece today.
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    Valve Cover Vent Hose - N51 N52 - E9x, E60, E70, Z4, E82
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    Genuine BMW - Corporate Logo
    T#:32279
    Part#: 11157559528
    In Stock
    2% off MSRP $ 108.99

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

    $ 106.99 USD
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    $ 108.99

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

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    This valve cover vent hose helps to vent the crankcase fumes on BMW's with the N51 / N52 6 cylinder engines. If replacing the the valve cover we recommend purchasing this item as well as it often will break while removing it from the valve cover.

    This item fits the following BMWs:
    2008-2013 E82 BMW 128i
    2006-2011 E90 BMW 325i 325xi 328i 328xi 328i xDrive 330i 330xi - Sedan
    2006-2012 E91 BMW 325xi 328i 328xi 328i xDrive - Wagon
    2007-2013 E92 BMW 328i 328xi 328i xDrive - Coupe
    2007-2013 E93 BMW 328i - Convertible
    2004-2010 E60 BMW 525i 525xi 530i 530xi 528i 528xi 528i xDrive
    2006-2010 E83 BMW X3 3.0i X3 3.0si
    2007-2013 E70 BMW X5 3.0si X5 xDrive30i
    2006-2008 E85 BMW Z4 3.0i Z4 3.0si
    2009+ E89 BMW Z4 sDrive30i
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    ECS Tuning N54 PCV Valve Upgraded - BMW N54 3.0L
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    ECS - Corporate Logo
    T#:4154602
    Part#: 090745ECS09
    Back Ordered
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    The OEM plastic Positive Crankcase Ventilation (PCV) valve does not hold pressure well, even when brand new. This means that when you are in boost conditions, the highly pressurized PCV valve leaks charged air back into the crankcase. Depending on the condition of your PCV valve, this can range from irritating to dangerous. Additionally, if your valve cover is cracked, loose, or has a bad gasket, you are likely experiencing a pressure leak either internally or externally, as well as potential oil loss issues. ECS Tuning now offers a solid aluminum PCV valve upgrade designed to address these issues by preventing leaks and outlasting the standard BMW-designed PCV! The internal components of this aluminum PCV valve fit tighter than the OE design and can withstand significantly more abuse, perfect for high mileage N54s, N54s that have been tuned, or N54s with upgraded turbos (larger twin or big single turbo builds). This may not be your last PCV Valve, but it will certainly outlast both the Genuine BMW and other common aftermarket alternatives!
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    Oil Separator Vent Hose
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    Bremmen Parts - Corporate Logo
    T#:33746535
    Part#: 11617559530
    In Stock
    Sale - Save 20% $ 42.99

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    Genuine BMW Extraction Line - E60 E91 E90 E91 N52 3.0L, Z4 N52 3.0L ...
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    Genuine BMW - Corporate Logo
    T#:22212
    Part#: 11157537701
    In Stock
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    $ 52.95 USD
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    Genuine BMW Extraction Line -
    This item fits the following BMW Chassis:
    E85,E86,E90

    Fits BMW Engines including:
    N52

    Crankcase Ventilation Valve With Gasket
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    Bremmen Parts - Corporate Logo
    T#:48125820
    Part#: 11127809512
    Ships on Sep 8, 2026
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    Restore proper engine ventilation with this premium replacement Crankcase Breather Valve (11127809512).

    Designed to match the performance of the original BMW unit (OE 11-12-7-809-512 / 11-12-7-803-790), this valve maintains correct crankcase pressure, helps prevent oil buildup, and supports clean, efficient engine operation.

    Crafted from high-quality, long-lasting materials and shaped to replicate the factory design, it installs easily in place of the stock breather without any modifications required.

    Whether you’re addressing pressure-related drivability issues, refreshing your engine’s ventilation system, or performing preventative maintenance, this breather valve provides dependable performance and protects your BMW’s engine for the long haul.

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    URO Crankcase Vent Hose - 11157522931
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    URO - Corporate Logo
    T#:26171673
    Part#: 11157522931
    Ships in 1 Business Day
    $ 39.79 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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    Crankcase Vent Hose - E9X 335i /xi, E82 135i, E60 535i/Xi
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    Genuine BMW - Corporate Logo
    T#:11946
    Part#: 11157553949
    In Stock
    4% off MSRP $ 89.95

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

    $ 85.92 USD
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    4% off MSRP
    $ 89.95

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    $ 85.92 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.

    This item fits the following BMWs:
    2008-2010 E82 BMW 135i
    2011+ E82 BMW 1M Coupe
    2006-2010 E90 BMW 335i 335xi 335i xDrive - Sedan
    2007-2010 E92 BMW 335i 335is 335xi 335i xDrive - Coupe
    2007-2010 E93 BMW 335i - Convertible
    2004-2010 E60 BMW 535i 535xi 535i xDrive
    2009+ Z4 BMW Z4 sDrive35i Z4 sDrive35is
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    URO Oil Separator Valve - BMW E60 E90 Z4 N52
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    URO - Corporate Logo
    T#:592960
    Part#: 11617531423
    Ships in 1 Business Day
    $ 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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    Genuine BMW Crank Case Vent Hose - E90 E92 E93 M3
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    Genuine BMW - Corporate Logo
    T#:36659
    Part#: 11617838288
    In Stock
    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

    Oil Separator Valve
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    Bremmen Parts - Corporate Logo
    T#:8677203
    Part#: 11617531423
    In Stock
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    $ 67.20 USD
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    This product was last offered at the strikethrough price on
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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
    Sale - Save 5% $ 48.99

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    $ 46.54 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 Crankcase Vent Hose
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    Rein - Corporate Logo
    T#:17804807
    Part#: 11157522931
    Ships in 1 Business Day
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    Manufactured with high-quality materials to withstand heat, dirt, oil, and other debris.
    Genuine BMW Oil Separator Service Kit - E9X M3 S65
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    Genuine BMW - Corporate Logo
    T#:340670
    Part#: 11157848155KT
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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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    Crankcase Oil Separator Hose - E9x, E60, E85 with N52 engine ...
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    Genuine BMW - Corporate Logo
    T#:20631
    Part#: 11157522931
    In Stock
    20% off MSRP $ 154.99

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    $ 125.99 USD
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    This is the oil separator hose that connects the crank case oil separator to the oil sump pipe for BMW's with the N52 6 cylinder engine.
    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.

    This item fits the following BMWs:
    2006-2011 E90 BMW 325i 325xi 330i 330xi - Sedan
    2006-2012 E91 BMW 325xi - Wagon
    2006-2007 E60 BMW 525i 525xi 530i 530xi
    2006 E85 BMW Z4 3.0i Z4 3.0si
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    Vacuum Pipe
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    Genuine BMW - Corporate Logo
    T#:37159
    Part#: 11667575774
    In Stock
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    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 39.90 USD
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    This product was last offered at the strikethrough price on
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    Genuine BMW Vacuum Pipe -
    This item fits the following BMW Chassis:
    E71,E82,E90,E92,E93,F06,F10,F12,F13,F15,F16

    Fits BMW Engines including:
    N55

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    Extraction Line
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    Bremmen Parts - Corporate Logo
    T#:30629688
    Part#: 11157537701
    In Stock
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    This product was last offered at the strikethrough price on
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    $ 22.84 USD
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    Vacuum Pipe - E90, E92, E93
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    Genuine BMW - Corporate Logo
    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
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    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


    Billet 1/2" Check Valve - N54
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    Vargas Turbo Technologies - Corporate Logo
    T#:557954
    Part#: VTT-CHECK-1
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    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

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    ECS Tuning Baffled Oil Catch Can - 8oz
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    ECS - Corporate Logo
    T#:13496655
    Part#: 003779ECS05-02
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    This product was last offered at the strikethrough price on
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    $ 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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    Rein Crankcase Ventilation Hose - E60, E61, E90, E91
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    Rein - Corporate Logo
    T#:591594
    Part#: 11157567802
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    This product was last offered at the strikethrough price on
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    $ 71.24 USD
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    From oil separator to oil pan vent tube

    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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    VTT CNC ORB Plug - -10AN
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    Vargas Turbo Technologies - Corporate Logo
    T#:642075
    Part#: VTT-10ORB
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    $ 23.99 USD
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    Billet Check Valve - 10 Barb
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    Vargas Turbo Technologies - Corporate Logo
    T#:597641
    Part#: VTT-CHECK-2
    Ships in 2 Business Days
    $ 36.99 USD
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    $ 36.99 USD
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    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!


    Flapper Delete Fitting - N54
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    Vargas Turbo Technologies - Corporate Logo
    T#:557962
    Part#: VTT-FLAPPER-DELE
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    $ 57.99 USD
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    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

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    Vacuum Pipe - E90, E91, E92, E93
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    Genuine BMW - Corporate Logo
    T#:37145
    Part#: 11667551621
    Ships in 1-2 days
    7% off MSRP $ 44.99

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

    $ 42.00 USD
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    7% off MSRP
    $ 44.99

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

    $ 42.00 USD
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    Genuine BMW Vacuum Pipe -
    This item fits the following BMW Chassis:
    E90,E92,E93

    Fits BMW Engines including:
    N51,N52N

    Crankcase Oil Separator - E90 325i/330i, E60 525i/530i, E85 Z4 3.0i/3...
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    Genuine BMW - Corporate Logo
    T#:13027
    Part#: 11617531423
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    7% off MSRP $ 148.99

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

    $ 138.99 USD
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    $ 148.99

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

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    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 solid 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 a oil sludge condition that is impossible to clear. Thankfully, the CCV is replaceable on the early N52 engines (2006) 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.

    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 item fits the following BMWs:
    2006-2011 E90 BMW 325i 325xi 330i 330xi - Sedan
    2006-2012 E91 BMW 325xi - Wagon
    2006-2007 E60 BMW 525i 525xi 530i 530xi
    2006-2008 E85 BMW Z4 3.0i Z4 3.0si
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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
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    This product was last offered at the strikethrough price on
    05-07-2026

    $ 41.79 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.
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    Vacuum Pipe - E90, E92, E93
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    Genuine BMW - Corporate Logo
    T#:36663
    Part#: 11617838382
    Ships in 8 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
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    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
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    Genuine BMW Vacuum Pipe -
    This item fits the following BMW Chassis:
    E90,E92,E93

    Fits BMW Engines including:
    S65

    FTP Motorsport PCV Valve Upgraded Replacement - N54
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    FTP Motorsport - Corporate Logo
    T#:583063
    Part#: SG84036
    Special Order: No Guaranteed ETA
    $ 60.00 USD
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    $ 60.00 USD
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    The OEM plastic PCV valve does not hold pressure well even when brand new. What this means is that when the turbochargers are making boost, pressurized air can become forced backwards through the valve and back into the crankcase. Depending on the condition of your PCV valve this can range from irritating to dangerous as a pressurized case can cause all sorts of issues. Additionally, if your valve cover is cracked due to age or has a bad gasket you are more than likely experiencing a pressure leak either internally or externally. These two features can cause even a low-mileage N54 to run like a tired elephant, sometimes even unlocking a special bonus function known as "Limp Mode". The solution is to replace any failed components and upgrade the PCV valve to something more capable withstanding the abuse of a turbocharged environment. FTP Motorsport has you covered with this solid aluminum valve assembly. It is essentially the same thing that came in your car from the factory, made out of aluminum. The internal components have also been made to fit tighter and outlast the life of an off the shelf replacement. No, this won't be the very last PCV valve you buy, but it will most certainly alleviate a lot of headaches common to N54 owners. And if you're tuned, big twin or single swapped you need one of these yesterday.
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    Bremmen Parts O Ring
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    Bremmen Parts - Corporate Logo
    T#:558205
    Part#: 11617533329
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    Sale - Save 30% $ 6.99

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

    $ 4.89 USD
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    Seals the PCV angle connector to the intake manifold
    Oil Separator Valve
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    Rein - Corporate Logo
    T#:594299
    Part#: 11617531423
    Ships in 3 Business Days
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    This product was last offered at the strikethrough price on
    06-29-2026

    $ 114.77 USD
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    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.
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    Crankcase Oil Separator and Vent Hose Kit - E90 325xi/330xi, E60 525x...
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    Packaged by Turner - Corporate Logo
    T#:221962
    Part#: TMS221962
    Ships in 3 Business Days
    $ 455.99 USD
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    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
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    OEM Rein Oil Separator Vent Hose - E60/1 E90/1 N52
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    Rein - Corporate Logo
    T#:402020
    Part#: 11617522933
    Ships in 1 Business Day
    Sale - Save 5% $ 19.99

    This product was last offered at the strikethrough price on
    06-29-2026

    $ 18.99 USD
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    $ 19.99

    This product was last offered at the strikethrough price on
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    If your BMW has a damaged vent hose, be sure to replace it to restore functionality of this rather important emissions system.
    PCV Adapter Fitting N54
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    Vargas Turbo Technologies - Corporate Logo
    T#:557961
    Part#: VTT-PCV-ADAPTER
    Ships in 10 Business Days
    $ 145.99 USD
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    $ 145.99 USD
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    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

     

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    Vacuum Pipe - E82, E84, E88, E90, E92, E93
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    Genuine BMW - Corporate Logo
    T#:37172
    Part#: 11667609055
    Ships in 1-2 days
    7% off MSRP $ 44.99

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

    $ 42.00 USD
    Free Shipping on orders $49 and up
    7% off MSRP
    $ 44.99

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

    $ 42.00 USD
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    Genuine BMW Vacuum Pipe -
    This item fits the following BMW Chassis:
    E82,E90,E92,E93

    Fits BMW Engines including:
    N55



    Genuine BMW Emissions Service Kit
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    Genuine BMW - Corporate Logo
    T#:376819
    Part#: 11617561408KT2
    Ships in 1-2 days
    $ 225.99 USD
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    $ 225.99 USD
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    Crankcase Ventilation Valve
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    Bremmen Parts - Corporate Logo
    T#:48125821
    Part#: 11127803790
    In Stock
    New Item
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    $ 12.23 USD
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    Ensure your BMW engine runs clean and efficiently with this Crankcase Breather Valve Diaphragm Spring and Cap (11127803790).

    A direct-fit replacement for the original BMW breather (OE 11127803790 / 11-12-7-803-790), this valve maintains proper crankcase pressure, reduces oil buildup, and promotes smooth engine performance.

    Constructed from durable, high-quality materials and engineered to OEM specifications, it installs easily without any modifications.

    Ideal for maintenance, resolving crankcase pressure issues, or restoring your engine’s ventilation system, this breather valve delivers reliable performance and helps protect your BMW for years to come.

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