CCV Oil Separator System for BMW 3 Series E91 (2006-2012)

Clear BMW chassis

Please ensure your correct model is selected

BMWs oil separator and crankcase ventilation system is excellent at what it does when properly maintained. Always inspect any visible hoses when you are under the hood and follow the manufacturers replacement schedule.
Sort By:

Genuine BMW Crank Case Fasteners - N54 3.0L, N52 3.0L, N55 3.0L ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:30544
Part#: 11110392552
In Stock
2% off MSRP $ 42.99

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

$ 41.99 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 42.99

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

$ 41.99 USD
Free Shipping on orders $49 and up


Genuine BMW Set Of Alu. Screws Crank Case
This item fits the following BMW Chassis:
E82 1M Coupe,E70 X5,E71 X6,E82,E83 X3,E85 Z4,E86 Z4,E89 Z4,E90,E92,E93,F01,F02,F06,F10,F12,F13,F15,F16,F22,F25 X3,F26 X4 X4,F30,F32,F33,F34,F36,F80 M3,F82 M4,F83

Fits BMW Engines including:
N51,N52,N52N,N54,N54T,N55,S55

Show More Show Less
Angle Connector With Heating Element
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
MTC - Corporate Logo
T#:556608
Part#: 11618638014
Ships in 3 Business Days
$ 39.99 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
Universal 10AN ORB To 3/8" Barb
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Radium Engineering - Corporate Logo
T#:31522993
Part#: RAD20-0530
In Stock
$ 37.99 USD
Free Shipping on orders $49 and up

Oil Separator Valve
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:8677203
Part#: 11617531423
In Stock
Sale - Save 4% $ 69.99

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

$ 67.20 USD
Free Shipping on orders $49 and up
Sale - Save 4%
$ 69.99

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

$ 67.20 USD
Free Shipping on orders $49 and up

Crankcase Oil Separator - E90 325i/330i, E60 525i/530i, E85 Z4 3.0i/3...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:13027
Part#: 11617531423
Ships in 3 Business Days
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
Free Shipping
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
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 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
Show More Show Less
Genuine BMW Crankcase Ventilation Hose
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:32283
Part#: 11157567802
Ships in 3 Business Days
3% off MSRP $ 162.99

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

$ 157.99 USD
Free Shipping
3% off MSRP
$ 162.99

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

$ 157.99 USD
Free Shipping


Genuine BMW Return Pipe -
This item fits the following BMW Chassis:
E90

Fits BMW Engines including:
N52


Crankcase Oil Separator and Vent Hose Kit - E90 325xi/330xi, E60 525x...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Turner Motorsport - Corporate Logo
T#:221961
Part#: TMS221961
Ships in 3 Business Days
$ 479.99 USD
Free Shipping
$ 479.99 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
  • 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
  • Show More Show Less
    Genuine BMW Oil Separator Vent Hose
    For vehicles with production date from 10/2005
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Genuine BMW - Corporate Logo
    T#:348665
    Part#: 11617559530OE
    Ships in 4 Business Days
    10% off MSRP $ 77.99

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

    $ 69.99 USD
    Free Shipping on orders $49 and up
    10% off MSRP
    $ 77.99

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

    $ 69.99 USD
    Free Shipping on orders $49 and up

    Oil Separator Valve
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    5X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
    Hengst - Corporate Logo
    T#:22064583
    Part#: AS815M
    Ships on Jul 22, 2026
    $ 64.99 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.
    Show More Show Less

    Upgraded Silicone CCV Hose - (11157522931) - N52
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Turner Motorsport - Corporate Logo
    T#:46203577
    Part#: 058973LA02
    In Stock
    $ 101.99

    This product was last offered at the strikethrough price on
    06-24-2026

    $ 78.99 USD
    Free Shipping
    $ 78.99 USD
    Free Shipping

    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.

    Show More Show Less
    URO Oil Separator Vent Hose - E90,E91,E60,E62,Z4 N52 (10/2005+) ...
    For vehicles with production date from 10/2005
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
    URO - Corporate Logo
    T#:639498
    Part#: 11617559530
    In Stock
    $ 28.99

    This product was last offered at the strikethrough price on
    05-27-2026

    $ 24.99 USD
    Limited Qty Sale
    Free Shipping on orders $49 and up
    $ 28.99

    This product was last offered at the strikethrough price on
    05-27-2026

    $ 24.99 USD
    Limited Qty Sale
    Free Shipping on orders $49 and up
    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. As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!
    Show More Show Less
    URO Crankcase Ventilation Return Hose - 11157567802
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
    URO - Corporate Logo
    T#:26171676
    Part#: 11157567802
    Ships in 1 Business Day
    $ 55.99 USD
    Free Shipping on orders $49 and up

    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
    Show More Show Less


    Crankcase Oil Separator and Vent Hose Kit - E90 325xi/330xi, E60 525x...
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Packaged by Turner - Corporate Logo
    T#:221962
    Part#: TMS221962
    Ships in 3 Business Days
    $ 455.99 USD
    Free Shipping
    $ 455.99 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
    Oil Separator Valve
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
    Rein - Corporate Logo
    T#:594299
    Part#: 11617531423
    Ships in 3 Business Days
    Sale - Save 5% $ 120.81

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

    $ 114.77 USD
    Free Shipping
    Sale - Save 5%
    $ 120.81

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

    $ 114.77 USD
    Free Shipping
    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.
    Show More Show Less
    Genuine BMW Emissions Service Kit
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Genuine BMW - Corporate Logo
    T#:376819
    Part#: 11617561408KT2
    Ships in 3 Business Days
    $ 225.99 USD
    Free Shipping
    $ 225.99 USD
    Free Shipping