Oil Separation & Breather System for BMW 5 Series E39 (1996-2003)

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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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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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Vaico Oil Separator Valve - E38, E39
For vehicles with production date from 09/1998
We Price Match - Give Us A Call or Chat!
Vaico - Corporate Logo
T#:363292
Part#: 11151705272
In Stock
Sale - Save 25% $ 31.99

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05-02-2026

$ 23.87 USD
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$ 31.99

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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
For vehicles with production date from 09/1998
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
05-03-2026

$ 12.23 USD
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Genuine BMW Mounting Grommet
Up to Model Year 09/1998
Genuine BMW - Corporate Logo
T#:360723
Part#: 13411733217
In Stock
$ 17.86 USD
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$ 17.86 USD
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Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46
For vehicles with production date from 09/1998
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

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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
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
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$ 93.71 USD
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This product was last offered at the strikethrough price on
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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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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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Oil Separator - Crankcase Ventilation System
For vehicles with production date from 09/1998
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
05-03-2026

$ 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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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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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
Limited Qty Sale
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$ 3.99

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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!
Victor Reinz - Corporate Logo
T#:18889
Part#: 11611729728
Ships in 1 Business Day
$ 4.99

This product was last offered at the strikethrough price on
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$ 4.07 USD
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$ 4.07 USD
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PROFILE-GASKET 11611729728 Manufactured by Reinz

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
Limited Qty Sale
Free Shipping on orders $49 and up
$ 41.99

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

$ 31.99 USD
Limited Qty Sale
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.
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Rein Return Pipe - E39, E46, E53, E60, E83, Z3, Z4
For vehicles with production date from 09/1998
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375092
Part#: 11617504536
In Stock
$ 19.99 USD
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$ 19.99 USD
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Runs from the intake manifold back to connecting hose
Febi - Corporate Logo
T#:6707
Part#: 11157532649
Ships in 1 Business Day
$ 19.12

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

$ 17.34 USD
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$ 17.34 USD
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ENGINE VENT HOSE 11157532649
Crankcase Vent Hose - From Valve Cover to Oil Separator - E46 E39 E6...
For vehicles with production date from 09/1998
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:2853
Part#: 11611432559
Ships in 1 Business Day
$ 14.99 USD
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$ 14.99 USD
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This Crankcase Vent Hose - From Valve Cover to Oil Separator fits BMWs with the M52 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.

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 528i 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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URO Crankcase Ventilation Hose - BMW M52TU M54
For vehicle with a production date from 09/1998
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:377307
Part#: 11157532649
Ships in 1 Business Day
$ 12.99 USD
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$ 12.99 USD
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From oil separator to dipstick tube

Return Pipe
For vehicles with production date from 01/2000
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:372847
Part#: 11617504536
Ships in 1 Business Day
$ 16.99 USD
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$ 16.99 USD
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Runs from the intake manifold back to connecting hose
"Cold Climate" Crankcase Pressure Regulator Valve
Superior performance for both warm and cold climates
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:376770
Part#: 11617533400
Ships in 1 Business Day
$ 70.99

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

$ 40.99 USD
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$ 40.99 USD
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Commonly referred to as the "oil separator" or PCV

Upper Oil Separator Vent Tube
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:384805
Part#: 11611440317
Ships in 3 Business Days
$ 20.30 USD
Free Shipping on orders $49 and up
Crankcase Ventilation Hose
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:378279
Part#: 11617533398
Ships in 1 Business Day
$ 21.99 USD
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The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate.
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Crankcase Ventilation Dipstick Hose - BMW M52TU M54
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:359570
Part#: 11157532629
Ships in 1 Business Day
$ 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.

Show More Show Less

Rein - Corporate Logo
T#:39059263
Part#: 11151705272
In Stock at Vendor
$ 25.00 USD
Free Shipping on orders $49 and up
$ 25.00 USD
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BMW Oil Separator Valve | E38 E39 540i 740i 740iL M62 4.4L Engine is an essential component designed to maintain optimal engine performance by purging oil vapors from the engine block into the valve cover. This valve features four hoses connecting it to the dipstick, valve cover, and air intake system, ensuring efficient crankcase ventilation. BMW engines, especially in colder climates, are known to experience issues with oil separators freezing if the engine isn't properly warmed up, leading to symptoms such as howling noises followed by oil leaks.

  • Effectively purges oil vapors from the engine block to maintain clean operation
  • Designed for BMW E38 and E39 models with M62 4.4L engine
  • Helps prevent oil separator freezing in cold weather conditions
  • Features four hoses connected to the dipstick, valve cover, and air intake for optimal ventilation
  • Reduces engine sludge buildup, preventing potential damage and maintaining efficiency
  • Durable construction to withstand high temperatures and the demands of the engine

Replace a worn oil separator valve to maintain the proper ventilation and efficiency of your BMW engine, preventing oil leaks and other performance issues.

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Victor Reinz - Corporate Logo
T#:19104
Part#: 11151747978
Ships in 1 Business Day
$ 5.69

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

$ 4.80 USD
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$ 4.80 USD
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O-RING 11151747978 Manufactured by Reinz

Hose - From Oil Separator to Oil Dipstick Tube - E46 E39
For use in cold climates
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:2879
Part#: 11157532629
In Stock at Vendor
$ 10.99 USD
Free Shipping on orders $49 and up
$ 10.99 USD
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This is the updated hose that goes from the Crankcase Oil Separator Valve to the oil dipstick tube. This tube tends to get plugged with oil sludge and becomes brittle and cracks. It fits E46 323i 323ci 325i (M54) 325ci (M54) 325xi 328i 328ci 330i 330ci 330xi - E39 525i 530i - E60 525i 530i 2004-2005 - X3 2.5i 3.0i 2004-2006 - Z3 2.5i 3.0i - Z4 2.5i 3.0i 2003-2006.
In german, Rein means Pure. In the automotive industry the Rein name has quickly come to represent quality. With fitments for some of the world’s finest automobiles including BMW and Mini and guaranteed OE quality, Rein is a name you can trust.

This item fits the following BMWs:
2001-2005 E46 BMW 325i 325ci 325xi Only for cars with M54 engine
1999-2005 E46 BMW 323i 323ci 328i 328ci 330i 330ci 330xi
2001-2003 E39 BMW 525i 530i
2004-2005 E60 BMW 525i 525xi 530i 530xi
2004-2006 E83 BMW X3 2.5i X3 3.0i
2001-2002 Z3 BMW Z3 2.5i Z3 3.0i
2003-2005 Z4 BMW Z4 2.5i Z4 3.0i
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Kayser - Corporate Logo
T#:1195920
Part#: 11151747978
Ships in 1 day
$ 5.99

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

$ 4.99 USD
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$ 4.99 USD
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Seals the vent pipe to the oil separator
Cold Climate Oil Separator Kit - Level 2
Superior performance for both warm and cold climates
Genuine BMW - Corporate Logo
T#:375276
Part#: 11617533400KT2
Ships in 1-2 days
$ 416.99

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

$ 374.99 USD
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$ 374.99 USD
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If you're ready for a complete, hassle free oil separator service, our kit builds on our core setup by adding crucial high wear rubber and sealing components to ensure maximum performance and zero vacuum leaks.
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Burgaflex - Corporate Logo
T#:596606
Part#: 11157532649
Ships in 4 Business Days
$ 12.99 USD
Free Shipping on orders $49 and up
$ 12.99 USD
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Maintain peak engine health and precise air-fuel control by replacing your worn or cracked factory breather assembly with a premium Burgaflex replacement.

Burgaflex - Corporate Logo
T#:596611
Part#: 11617504536
Ships in 4 Business Days
$ 17.99

This product was last offered at the strikethrough price on
09-26-2026

$ 13.99 USD
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$ 13.99 USD
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Keep your vehicle running crisp and leak-free with this premium return pipe manufactured by Burgaflex.

Burgaflex - Corporate Logo
T#:57725180
Part#: 11151740393
Ships in 4 Business Days
New Item
$ 5.99 USD
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Maintain your engine's operational integrity and keep vacuum leaks at bay with this essential replacement vent hose from Burgaflex.
Oil Separator Kit | BMW E38 E39 M62 4.4L
For vehicles with production date from 09/1998
Genuine BMW - Corporate Logo
T#:575977
Part#: 11151705272KT
Ships in 7 Business Days
$ 171.99 USD
Free Shipping
$ 171.99 USD
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Oil Separator Kit | BMW E38 E39 M62 4.4L is designed to resolve common crankcase ventilation issues, ensuring optimal engine performance and reliability. BMW vehicles equipped with the M62 4.4L engine often experience oil separator failure, especially in cold weather, leading to excessive oil consumption, vacuum leaks, and potential engine damage. This complete kit replaces all critical components, preventing freezing and cracking caused by condensation buildup. Upgrading to a new oil separator system helps maintain proper oil vapor management, reducing the risk of oil leaks and performance issues.

  • Prevents common oil separator freezing and failure in cold weather
  • Helps eliminate excessive oil consumption and vacuum leaks
  • Direct-fit replacement for BMW E38 and E39 M62 4.4L engines
  • Includes all necessary components for a complete system overhaul
  • Restores proper crankcase ventilation for improved engine efficiency
  • Manufactured to meet or exceed OEM quality standards
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Rein Crankcase Ventilation Hose - E39, E46, E60, E83, Z3, Z4 ...
For vehicles with production date from 09/1998
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:359420
Part#: 11157532649
In Stock
$ 11.99 USD
Free Shipping on orders $49 and up
$ 11.99 USD
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ENGINE VENT HOSE 11157532649
Genuine BMW - Corporate Logo
T#:35861
Part#: 11531406921
Ships in 7 Business Days
3% off MSRP $ 224.99

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

$ 217.99 USD
Free Shipping
3% off MSRP
$ 224.99

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

$ 217.99 USD
Free Shipping


Genuine BMW Return Pipe - Zyl. 5-8
This item fits the following BMW Chassis:
E39 M5,E39

Fits BMW Engines including:
S62


Genuine BMW - Corporate Logo
T#:35860
Part#: 11531406918
Ships in 7 Business Days
3% off MSRP $ 224.99

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

$ 217.99 USD
Free Shipping
3% off MSRP
$ 224.99

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

$ 217.99 USD
Free Shipping


Genuine BMW Return Pipe - Zyl. 1-4
This item fits the following BMW Chassis:
E39 M5,E39

Fits BMW Engines including:
S62


"Cold Climate" Crankcase Pressure Regulator Valve
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:35829339
Part#: 11617533400
Back Ordered
$ 69.99 USD
Free Shipping on orders $49 and up
BMW vehicles are prone to oil separators freezing in cold weather if driven before the engine is fully warmed up. This can lead to a howling noise followed by multiple oil leaks. The crankcase breather valve vents oil vapor from the engine block to the valve cover, but condensation can sometimes cause it to freeze, leading to a failure of the entire oil separator system, causing it to crack and break down. To prevent damage to your engine, it’s best to replace all components of the oil separator system at once. Replacing everything ensures reliable performance and durability. Remember to also order a valve cover gasket to make the replacement process easier.
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Bremmen Mounting Grommet Seal - BMW E36 E39 Z3 E34 E38
Up to Model Year 09/1998
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:640144
Part#: 13411733217
Back Ordered
$ 10.99 USD
Free Shipping on orders $49 and up
$ 10.99 USD
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This grommet is located on the back side of the PCV or idle control valve