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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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Comprehensive Constant Pressure Valve Replacement Kit
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:557341
Part#: 11111318185TMSKT
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$ 84.32 USD
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When your CPV O-ring fails it causes a slow oil leak on the passenger side of the engine, making an oily mess that frequently resembles a rear main seal leak. Replacing the CPV with an upgraded o-ring ensures a long-term solution to this common problem. 

The factory o-ring over time fails from heat cycling and oil exposure due to the Buna rubber used in OEM o-rings, while the included Viton Fluoroelastomer is resistant to a much higher temperature to ensure prolonged life without leaking. 

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Genuine BMW - Corporate Logo
T#:14624
Part#: 11617831930
Ships in 3 Business Days
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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.

$ 115.05 USD
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Vents gases from the crankcase back into the intake.
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.


Genuine BMW Vent Hose
This item fits the following BMW Chassis:
E46 M3,E85 Z4M,E46,E85 Z4,E86 Z4

Fits BMW Engines including:
S54
 

 

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Performance Oil Separator Kit - M52/S52
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:51356040
Part#: 059015LA02KT2KT
Ships on Nov 2, 2026
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Sale - Save 19% $ 104.99

This product was last offered at the strikethrough price on
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$ 84.77 USD
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$ 104.99

This product was last offered at the strikethrough price on
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$ 84.77 USD
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On M52/S52-equipped BMWs, the factory crankcase ventilation (CCV) system is a notorious weak link. Between brittle plastic corrugated hoses that crumble from heat soak and an internal cyclone diaphragm prone to tearing, a failing CCV leads to massive oil consumption, vacuum leaks, and that dreaded "howling" whistle.

This kit addresses these issues with all new components and hardware. Both oil separator hoses, the cyclone separator itself, the mounting grommet, and the retaining bolts are included. Servicing this system is guaranteed to restore performance lost as a result of worn CCV components.

Kit includes:

Cyclone Separator/Crankcase Pressure Regulator Valve High Performance Silicone Breather Hose Return Hose Mounting Grommet Hex Bolt (3)

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Genuine BMW - Corporate Logo
T#:22212
Part#: 11157537701
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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.

$ 52.99 USD
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$ 55.74

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Genuine BMW Extraction Line -
This item fits the following BMW Chassis:
E85,E86,E90

Fits BMW Engines including:
N52


Genuine BMW - Corporate Logo
T#:13028
Part#: 11617533399
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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.

$ 38.69 USD
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$ 41.99

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GENUINE BMW CONNECTING LINE:111060
Genuine BMW - Corporate Logo
T#:6684
Part#: 11151406953
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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.

$ 48.41 USD
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$ 52.99

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

Fits BMW Engines including:
S62


Genuine BMW - Corporate Logo
T#:216971
Part#: 11158647299
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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.

$ 191.99 USD
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Genuine Bmw Connecting Line - 11158647299
Packaged by Turner - Corporate Logo
T#:24344785
Part#: M54OILSEPKT
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$ 133.54 USD
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If you need to perform a complete oil separator system service, this Level 2 kit provides you with all of the main components necessary to service your engine oil separator system. This Level 2 kit includes the following: Oil Separator Hose from oil separator to dipstick tube Hose from oil separator to valve cover Hose from intake manifold back to the connector hose Hose from oil separator up to the intake manifold Throttle body gasket Throttle body inlet boot ICV rubber grommet Oil dipstick tube o-ring seal It is highly recommended to replace the oil dipstick tube with the updated design by BMW as this also a common place for sludge to build up.
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Genuine BMW - Corporate Logo
T#:348228
Part#: 11157532629
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$ 36.17 USD
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Genuine BMW - Corporate Logo
T#:177071
Part#: 11667613026
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$ 39.12 USD
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Genuine BMW Vacuum Pipe With Non-Return Valve -
This item fits the following BMW Chassis:
F22,F30,F31,F32,F33,F34,F36

Fits BMW Engines including:
N20,N26,N55

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Genuine BMW - Corporate Logo
T#:20631
Part#: 11157522931
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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.

$ 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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Genuine BMW - Corporate Logo
T#:36140
Part#: 11537806706
In Stock
Sale - Save 8% $ 244.99

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

$ 225.87 USD
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$ 244.99

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$ 225.87 USD
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Genuine BMW Return Pipe -
This item fits the following BMW Chassis:
E70 X5

Fits BMW Engines including:
M57



Genuine BMW - Corporate Logo
T#:62439
Part#: 34302283606
In Stock
Sale - Save 10% $ 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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$ 91.99

This product was last offered at the strikethrough price on
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$ 82.99 USD
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Genuine BMW Vacuum Pipe -
This item fits the following BMW Chassis:
E90,E92,E93

Turner Oil Separator Kit - E39 M54
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:555298
Part#: 11617501566KT6
In Stock
Sale - Save 19% $ 181.99

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

$ 147.02 USD
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$ 181.99

This product was last offered at the strikethrough price on
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$ 147.02 USD
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The plastic hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the plastic components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

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

Fits the following BMWs:
2000-2003 E39 BMW 530i

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Genuine BMW - Corporate Logo
T#:37115
Part#: 11657846163
In Stock
Sale - Save 8% $ 37.99

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

$ 35.11 USD
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$ 37.99

This product was last offered at the strikethrough price on
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$ 35.11 USD
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Genuine BMW Vacuum Hose Red
This item fits the following BMW Chassis:
E70 X5M,E71 X6M,E70 X5,E71 X6

Fits BMW Engines including:
S63


Genuine BMW - Corporate Logo
T#:37499
Part#: 11731435862
Ships in 8 Business Days
Sale - Save 24% $ 29.99

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

$ 22.93 USD
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$ 29.99

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Genuine BMW Hose - 470mm
This item fits the following BMW Chassis:
E36

Fits BMW Engines including:
M44


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%
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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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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
05-03-2026

$ 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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Crankcase Ventilation Refresh Kit
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:57543744
Part#: 11158647962KT2
In Stock at Vendor
New Item
$ 265.99 USD
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Maintain optimal engine vacuum and prevent oil blow-by failures under hard driving with this complete Crankcase Ventilation Refresh Kit. Aged oil separator valves and heat stressed plastic hoses fail unexpectedly, leading to oil ingestion, loss of power, and damaged rear main or valve cover gaskets from excessive crankcase pressure buildup. Designed as a direct fit refresh, this kit ensures crisp throttle response, proper engine breathing, and total peace of mind on the street or track.
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Genuine BMW - Corporate Logo
T#:32270
Part#: 11157513756
Ships in 3 Business Days
Sale - Save 16% $ 177.99

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

$ 148.91 USD
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Sale - Save 16%
$ 177.99

This product was last offered at the strikethrough price on
05-14-2026

$ 148.91 USD
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Genuine BMW Vent Hose -
This item fits the following BMW Chassis:
E46

Fits BMW Engines including:
M56


Oil Separator kit - N63
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:56291074
Part#: 11158636540KT2
Ships in 3 Business Days
New Item
$ 429.67 USD
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If your BMW is burning oil, showing unmetered air faults, or suffering from degraded throttle response, a compromised breather system is usually the culprit. The N63 Crankcase Breather Package pairs Genuine BMW oil separators with OE tier Rein connecting pipes. Designed to restore factory level oil separation and sealed vacuum integrity across both cylinder banks
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Turner Oil Separator Kit - E53 X5 M62 4.4L 4.6L
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:555308
Part#: 11151705237KT1
Back Ordered
Sale - Save 11% $ 208.99

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

$ 186.75 USD
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Sale - Save 11%
$ 208.99

This product was last offered at the strikethrough price on
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$ 186.75 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, and hardware.

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

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