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Oil Separation & Breather System

Every car has a crankcase vent system that is supposed to suppress oil from making it into the intake ports and combustion chamber. A good functioning system will separate oil from the atmosphere and return it to the oil pan (or collect it in a catch can) while allowing the leftover vapors to burn in the combustion chamber or recirculate through the system. This has always been known as a PCV system (Positive Crankcase Ventilation) but BMW has several other names for it - oil separator, crankcase vent (CCV), and cyclonic separator. Failures in the system will allow raw oil to enter the intake and eventually into the engine itself which can have disastrous effects on engine performance and longevity. As emissions regulations on oil and gas venting have gotten more stringent the PCV systems have gotten more complex and failure prone. And because the CCV is intertwined with other systems you could experience rough running, loss of power, higher oil consumption, misfiring, stalling, or other annoying issues. There is no replacement interval for these so we recommend inspecting your crankcase vent system as part of your regular maintenance routines. Symptoms of a bad crankcase vent are: whitish or yellowish film on the underside of the oil cap, whistling/squealing noises (not caused by a belt), suction on the oil cap that makes it hard to unscrew, large amounts of white smoke from the exhaust, and excessive oil consumption.

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Genuine BMW - Corporate Logo
T#:36663
Part#: 11617838382
Ships in 7 Business Days
5% off MSRP $ 64.99

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$ 61.99 USD
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$ 64.99

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$ 61.99 USD
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Genuine BMW Vacuum Pipe -
This item fits the following BMW Chassis:
E90,E92,E93

Fits BMW Engines including:
S65

Genuine BMW - Corporate Logo
T#:62401
Part#: 34301163638
Special Order: No Guaranteed ETA
4% off MSRP $ 27.99

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$ 27.00 USD
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4% off MSRP
$ 27.99

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$ 27.00 USD
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Genuine BMW Vacuum Hose -
This item fits the following BMW Chassis:
E39

Genuine BMW - Corporate Logo
T#:36651
Part#: 11617836997
Ships in 7 Business Days
5% off MSRP $ 102.99

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

$ 97.99 USD
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$ 102.99

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

$ 97.99 USD
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Genuine BMW Vacuum Pipe
This item fits the following BMW Chassis:
E60 M5,E63 M6,E63

Fits BMW Engines including:
S85


Genuine BMW - Corporate Logo
T#:41966
Part#: 13531407568
Special Order: No Guaranteed ETA
2% off MSRP $ 103.99

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$ 101.99 USD
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2% off MSRP
$ 103.99

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

$ 101.99 USD
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Genuine BMW Vacuum Pipe
This item fits the following BMW Chassis:
E39 M5,E39

Fits BMW Engines including:
S62


Genuine BMW - Corporate Logo
T#:37499
Part#: 11731435862
Ships in 7 Business Days
Sale - Save 24% $ 29.99

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$ 22.93 USD
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$ 29.99

This product was last offered at the strikethrough price on
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$ 22.93 USD
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Genuine BMW Hose - 470mm
This item fits the following BMW Chassis:
E36

Fits BMW Engines including:
M44

Genuine BMW - Corporate Logo
T#:36147
Part#: 11537830558
Ships in 7 Business Days
3% off MSRP $ 224.99

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$ 217.99 USD
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$ 224.99

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$ 217.99 USD
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Genuine BMW Return Pipe
This item fits the following BMW Chassis:
E39 M5,E39

Fits BMW Engines including:
S62


Genuine BMW - Corporate Logo
T#:36621
Part#: 11617832298
Special Order: No Guaranteed ETA
3% off MSRP $ 72.99

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$ 70.99 USD
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$ 72.99

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Genuine BMW Pipe
This item fits the following BMW Chassis:
E46 M3,E46

Fits BMW Engines including:
S54

Genuine BMW - Corporate Logo
T#:45164
Part#: 16131184233
Ships in 7 Business Days
4% off MSRP $ 46.99

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$ 44.99 USD
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4% off MSRP
$ 46.99

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$ 44.99 USD
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Genuine BMW Vacuum Pipe -
This item fits the following BMW Chassis:
E39

Fits BMW Engines including:
M52


Vacuum Pipe
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:52586629
Part#: 11157603816
In Stock
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$ 23.99 USD
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$ 29.99

This product was last offered at the strikethrough price on
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$ 23.99 USD
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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 Dec 28, 2026
$ 48.99 USD
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$ 48.99 USD
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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
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Bremmen Crankcase Oil Seperator Valve - E38 E39 M62 4.4L
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:640156
Part#: 11151705272
Special Order: No Guaranteed ETA
Sale - Save 16% $ 34.99

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

$ 29.47 USD
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$ 34.99

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$ 29.47 USD
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BMW has an issue with oil separators freezing in cold weather if the engine is not fully warmed up during driving. Common symptoms are a howling noise followed by oil leaks. Crankcase breather valve used to purge the oil vapor from the engine block into the valve cover. This valve has 4 hoses connected to it, running to the dipstick, valve cover, and air intake.
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Bremmen Parts - Corporate Logo
T#:1195923
Part#: 11157575640
In Stock
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This product was last offered at the strikethrough price on
05-03-2026

$ 49.41 USD
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$ 52.99

This product was last offered at the strikethrough price on
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$ 49.41 USD
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Replace your damaged crank vent pipe


N20 Vacuum Hose - 11657607726
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:36981055
Part#: 11657607726
Special Order: No Guaranteed ETA
Sale - Save 20% $ 42.99

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05-03-2026

$ 34.26 USD
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$ 42.99

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$ 34.26 USD
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Due to weak rubber construction and exposure to heat, this vacuum hose may be brittle and/or broken.

Replace it with this high-quality piece from Bremmen Parts to ensure proper turbocharger functionality.

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Turner Oil Separator Valve Service Kit - E39 M5
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:555299
Part#: 11151406788KT3
Back Ordered
$ 326.99

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

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

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

Fits the following BMWs:
1998-2003 E39 BMW M5

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Rein Crank Case Ventilation Valve - Priced Each
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:17738377
Part#: 11158647299
In Stock
$ 73.99 USD
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Rein's OE quality breather hose helps prevent pressure build-up in the engine.

Vaico Oil Separator Valve - E38, E39
We Price Match - Give Us A Call or Chat!
Vaico - Corporate Logo
T#:363292
Part#: 11151705272
In Stock
Sale - Save 25% $ 31.99

This product was last offered at the strikethrough price on
05-02-2026

$ 23.87 USD
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Sale - Save 25%
$ 31.99

This product was last offered at the strikethrough price on
05-02-2026

$ 23.87 USD
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Connects to the vent tube which is attached to the PCV valve

Crankcase Ventilation Hose
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:30629689
Part#: 11157532649
In Stock
Sale - Save 24% $ 15.99

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

$ 12.23 USD
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Sale - Save 24%
$ 15.99

This product was last offered at the strikethrough price on
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$ 12.23 USD
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Genuine BMW - Corporate Logo
T#:360723
Part#: 13411733217
In Stock
$ 17.86 USD
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$ 17.86 USD
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BMW Crankcase Pressure Regulator Valve
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46478579
Part#: ABH0263
In Stock
$ 23.99 USD
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$ 23.99 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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Crankcase Ventilation Hose - E46 M3 Z3M Coupe S54
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:25109076
Part#: 11157831311
Ships on Oct 22, 2026
$ 17.99 USD
Free Shipping on orders $49 and up

This hose runs from the oil separator to the intake manifold and is designed to allow the recirculation of built-up oil vapors.

Due to its proximity to engine heat, this hose tends to get brittle and break as it ages. This can lead to oil leaks, vacuum leaks, misfires, and more.

If your crankcase ventilation hose is brittle or leaking, replace it with this unit from URO Parts.

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Intake Manifold Rubber Grommet 13411733217
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:7203
Part#: 13411733217
In Stock
$ 12.65

This product was last offered at the strikethrough price on
09-23-2026

$ 11.99 USD
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$ 11.99 USD
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FUEL PREPARATION INTAKE MANIFOLD RUBBER GROMMET 13411733217

Oil Separator Kit - Level 1
10X Entries Into Our F80 M3 Sweepstakes
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
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Sale - Save 24%
$ 123.99

This product was last offered at the strikethrough price on
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$ 93.71 USD
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Replace all the components of the oil separator system together to prevent damage to all the aspects of your engine. As long as you have everything off, you can rest assured that new parts will last and be reliable. BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate. ur Level 1 kit includes the following; Oil separator Hose from oil separator to dipstick tube Hose from oil separator to valve cover Hose from intake manifold back to the connector hose Hose from oil separator up to the intake manifold
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URO Crankcase Vent Valve Repair Kit - B58
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:55713528
Part#: 11121025447
In Stock
New Item
Sale - Save 9% $ 222.99

This product was last offered at the strikethrough price on
07-08-2026

$ 203.49 USD
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Sale - Save 9%
$ 222.99

This product was last offered at the strikethrough price on
07-08-2026

$ 203.49 USD
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The URO Parts Crankcase Vent Valve Repair Kit is the smart technician's fix for the notorious BMW crankcase ventilation failures.
Victor Reinz - Corporate Logo
T#:18889
Part#: 11611729728
In Stock
$ 4.99

This product was last offered at the strikethrough price on
04-06-2026

$ 4.07 USD
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$ 4.07 USD
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PROFILE-GASKET 11611729728 Manufactured by Reinz



Engine Vent Hose 11151740393
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:6703
Part#: 11151740393
Ships in 4 Business Days
$ 5.89 USD
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ENGINE VENT HOSE 11151740393
Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:640147
Part#: 11611432559
In Stock
Sale - Save 22% $ 23.99

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

$ 18.76 USD
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$ 23.99

This product was last offered at the strikethrough price on
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$ 18.76 USD
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Crankcase Vent Hose - From Valve Cover to Oil Separator - Fit BMWs with the M52 or M54 6 cylinder engine
Rein - Corporate Logo
T#:34181269
Part#: 11157831311
In Stock
$ 11.99 USD
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Crankcase Vent Hose ABV0329 is an essential component designed for BMW engines, ensuring optimal performance of the crankcase ventilation system. This high-quality vent hose plays a critical role in regulating and redirecting excess gases from the crankcase back into the engine's intake, reducing harmful emissions and preventing pressure buildup. Crankcase Vent Hose ABV0329 helps maintain engine efficiency and protects against potential damage caused by over-pressurization or oil leaks.

Made from durable, heat-resistant materials, this hose is built to withstand the high temperatures and pressures common in BMW engines. It is a direct-fit replacement, making installation simple and efficient for both professionals and DIY mechanics. Available from Turner Motorsport, Crankcase Vent Hose ABV0329 is the perfect solution for restoring and maintaining your BMW’s crankcase ventilation system.

Key Benefits:

  • Ensures proper crankcase ventilation for optimal engine performance
  • Reduces harmful emissions by redirecting excess gases into the intake
  • Prevents pressure buildup and protects against oil leaks
  • Constructed from durable, heat-resistant materials for long-lasting reliability
  • Direct-fit replacement, ensuring easy installation for various BMW models
  • Available from Turner Motorsport, a trusted source for BMW performance parts
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Victor Reinz - Corporate Logo
T#:592731
Part#: 07119906360
In Stock
$ 3.99

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

$ 2.99 USD
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$ 3.99

This product was last offered at the strikethrough price on
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$ 2.99 USD
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If this gasket fails it can cause oil leaks and other issues. Replace it at any sign of failure!

Oil Separator - Crankcase Ventilation System
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:8741202
Part#: 11151705272B
In Stock
Sale - Save 17% $ 22.99

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

$ 19.07 USD
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Sale - Save 17%
$ 22.99

This product was last offered at the strikethrough price on
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$ 19.07 USD
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BMW has an issue with oil separators freezing in cold weather if the engine is not fully warmed up during driving. Common symptoms are a howling noise followed by oil leaks. Crankcase breather valve used to purge the oil vapor from the engine block into the valve cover. This valve has 4 hoses connected to it, running to dipstick, valve cover, air intake.
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Oil Separator - Crankcase Ventilation System
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:8741203
Part#: 11151705237
In Stock
Sale - Save 59% $ 15.99

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

$ 6.50 USD
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Sale - Save 59%
$ 15.99

This product was last offered at the strikethrough price on
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$ 6.50 USD
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Critical crankcase ventilation cyclone separator - great replacement or custom install! ​Failure of the oil separator commonly causes problems related to smoking or a check engine light. Featuring an approximately ¾” air inlet/outlet and ½” oil drain outlet, this oil separator/CCV commonly found in custom installations on many vehicles.
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Rein PCV Hose - E36, Z3
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379766
Part#: 11151740393
In Stock
$ 7.19 USD
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Attaches the PCV to the oil dipstick tube
Elring Crank Case Vent Valve Gasket - M60 M62
2X Entries Into Our F80 M3 Sweepstakes
Elring - Corporate Logo
T#:362757
Part#: 11611729728
In Stock
$ 7.13

This product was last offered at the strikethrough price on
06-03-2026

$ 6.11 USD
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$ 6.11 USD
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This gasket seals the PCV valve to the valve cover. If this leaks, you maybe experience poor running conditions or check engine lights. Replace your leaking seal with a new Elring gasket to ensure long lasting reliability. 

Elring is one of the biggest OEM names in the manufacturing of high quality gaskets that are available for very affordable prices. Elring has supplied many automotive names for years with the gaskets that seal your car's components from day 1 so you can rest assured that these components will last for a long time to come!

Fits the following BMW engines:
M60 3.0L 4.0L
M62 4.4L

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Cold Climate Oil Separator Kit - Level 2
10X Entries Into Our F80 M3 Sweepstakes
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
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Sale - Save 41%
$ 231.99

This product was last offered at the strikethrough price on
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$ 137.46 USD
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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.
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Bremmen Parts O Ring
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:558205
Part#: 11617533329
In Stock
Sale - Save 30% $ 6.99

This product was last offered at the strikethrough price on
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$ 4.89 USD
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$ 6.99

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Seals the PCV angle connector to the intake manifold
Oil Separator Valve
5X Entries Into Our F80 M3 Sweepstakes
5X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Hengst - Corporate Logo
T#:22064588
Part#: AS819M
In Stock
$ 41.99

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

$ 31.99 USD
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$ 41.99

This product was last offered at the strikethrough price on
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$ 31.99 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.
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Packaged by Turner - Corporate Logo
T#:221962
Part#: TMS221962
Ships in 2 Business Days
$ 458.99 USD
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$ 458.99 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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    BMW Breather Valve
    We Price Match - Give Us A Call or Chat!
    Febi - Corporate Logo
    T#:17339405
    Part#: 11127537733
    Ships in 2 Business Days
    $ 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.
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    Crankcase Ventilation Dipstick Hose - BMW M52TU M54
    2X Entries Into Our F80 M3 Sweepstakes
    URO - Corporate Logo
    T#:359570
    Part#: 11157532629
    Ships in 2 Business Days
    $ 12.99 USD
    Free Shipping on orders $49 and up

    This tube runs from the oil separator to the lower dipstick tube.

     

    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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    Febi Crankcase Ventilation Hose - E34
    We Price Match - Give Us A Call or Chat!
    Febi - Corporate Logo
    T#:381678
    Part#: 11151708801
    Ships in 2 Business Days
    $ 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.

    Pressure Regulator Valve Repair Kit
    2X Entries Into Our F80 M3 Sweepstakes
    URO - Corporate Logo
    T#:600041
    Part#: 11127547058
    Ships in 2 Business Days
    $ 14.99 USD
    Free Shipping on orders $49 and up

    Victor Reinz - Corporate Logo
    T#:19104
    Part#: 11151747978
    Ships in 2 Business Days
    $ 5.69

    This product was last offered at the strikethrough price on
    06-05-2026

    $ 4.80 USD
    Free Shipping on orders $49 and up
    $ 4.80 USD
    Free Shipping on orders $49 and up


    O-RING 11151747978 Manufactured by Reinz

    Upper Oil Separator Vent Tube
    2X Entries Into Our F80 M3 Sweepstakes
    Rein - Corporate Logo
    T#:384805
    Part#: 11611440317
    Ships in 4 Business Days
    $ 20.30 USD
    Free Shipping on orders $49 and up

    Return Pipe
    2X Entries Into Our F80 M3 Sweepstakes
    URO - Corporate Logo
    T#:372847
    Part#: 11617504536
    Ships in 2 Business Days
    $ 16.99 USD
    Free Shipping on orders $49 and up
    $ 16.99 USD
    Free Shipping on orders $49 and up
    Runs from the intake manifold back to connecting hose
    Oil Separator Valve
    2X Entries Into Our F80 M3 Sweepstakes
    Rein - Corporate Logo
    T#:594299
    Part#: 11617531423
    Ships in 4 Business Days
    $ 120.81 USD
    Free Shipping
    $ 120.81 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.
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    Rein Crankcase Ventilation Hose - Cylinders 1-4
    2X Entries Into Our F80 M3 Sweepstakes
    Rein - Corporate Logo
    T#:17738390
    Part#: 11617563476
    Ships in 4 Business Days
    $ 46.99 USD
    Free Shipping on orders $49 and up
    $ 46.99 USD
    Free Shipping on orders $49 and up
    Manufactured with high-quality materials to withstand heat, dirt, and debris, matching OE expectations.

    Crankcase Vent Hose - Cylinders 5-8
    2X Entries Into Our F80 M3 Sweepstakes
    Rein - Corporate Logo
    T#:384972
    Part#: 11617547186
    Ships in 4 Business Days
    $ 59.99 USD
    Free Shipping
    $ 59.99 USD
    Free Shipping
    Should be replaced anytime leaks are detected
    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

    $ 17.34 USD
    Free Shipping on orders $49 and up
    $ 17.34 USD
    Free Shipping on orders $49 and up
    ENGINE VENT HOSE 11157532649
    Crankcase Ventilation Hose
    2X Entries Into Our F80 M3 Sweepstakes
    URO - Corporate Logo
    T#:378279
    Part#: 11617533398
    Ships in 2 Business Days
    $ 21.99 USD
    Free Shipping on orders $49 and up
    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


    "Cold Climate" Crankcase Pressure Regulator Valve
    2X Entries Into Our F80 M3 Sweepstakes
    URO - Corporate Logo
    T#:376770
    Part#: 11617533400
    Ships in 2 Business Days
    $ 70.99

    This product was last offered at the strikethrough price on
    04-10-2026

    $ 40.99 USD
    Free Shipping
    $ 40.99 USD
    Free Shipping
    Commonly referred to as the "oil separator" or PCV
    Vacuum Pipe
    2X Entries Into Our F80 M3 Sweepstakes
    Rein - Corporate Logo
    T#:17704694
    Part#: 11157603816
    Ships in 4 Business Days
    $ 35.99 USD
    Free Shipping on orders $49 and up