Find Parts That Fit Your Vehicle

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.

Sub-Categories

Sort By:

Genuine BMW - Corporate Logo
T#:575977
Part#: 11151705272KT
Ships in 7 Business Days
$ 171.99 USD
Free Shipping
$ 171.99 USD
Free Shipping

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
Show More Show Less
Rein - Corporate Logo
T#:359420
Part#: 11157532649
In Stock
$ 11.99 USD
Free Shipping on orders $49 and up
$ 11.99 USD
Free Shipping on orders $49 and up
ENGINE VENT HOSE 11157532649
Genuine BMW - Corporate Logo
T#:36543
Part#: 11617560070
Ships in 7 Business Days
4% off MSRP $ 23.99

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

$ 22.99 USD
Free Shipping on orders $49 and up
4% off MSRP
$ 23.99

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

$ 22.99 USD
Free Shipping on orders $49 and up


Genuine BMW Hose -
This item fits the following BMW Chassis:
E38

Fits BMW Engines including:
M62


Genuine BMW - Corporate Logo
T#:36425
Part#: 11611742324
Ships in 7 Business Days
2% off MSRP $ 169.99

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

$ 166.99 USD
Free Shipping
2% off MSRP
$ 169.99

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

$ 166.99 USD
Free Shipping


Genuine BMW Sound Absorber -
This item fits the following BMW Chassis:
E34

Fits BMW Engines including:
M60


Genuine BMW - Corporate Logo
T#:6679
Part#: 11151286257
Ships in 7 Business Days
$ 8.99 USD
Free Shipping on orders $49 and up


Genuine BMW ENGINE HOSE 11151286257.--

This item fits the following BMWs:
BMW 3 Series - 320i

--.

Fits BMW Engines including:
M10

Show More Show Less
Genuine BMW - Corporate Logo
T#:151009
Part#: 64221972010
Ships in 7 Business Days
3% off MSRP $ 121.99

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

$ 117.99 USD
Free Shipping
3% off MSRP
$ 121.99

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

$ 117.99 USD
Free Shipping


Genuine BMW Breather Covering Rear
This item fits the following BMW Chassis:
E30 M3,E30


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


Genuine BMW - Corporate Logo
T#:42058
Part#: 13531734196
Ships in 7 Business Days
3% off MSRP $ 31.99

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

$ 30.99 USD
Free Shipping on orders $49 and up
3% off MSRP
$ 31.99

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

$ 30.99 USD
Free Shipping on orders $49 and up


Genuine BMW Return Pipe -
This item fits the following BMW Chassis:
E30

Fits BMW Engines including:
M42


Genuine BMW - Corporate Logo
T#:32278
Part#: 11157547820
Special Order: No Guaranteed ETA
4% off MSRP $ 79.99

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

$ 76.99 USD
Free Shipping on orders $49 and up
4% off MSRP
$ 79.99

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

$ 76.99 USD
Free Shipping on orders $49 and up


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

Fits BMW Engines including:
N51

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#:22064593
Part#: AS826M-D851
Ships on Oct 21, 2026
$ 62.99 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
Burgaflex - Corporate Logo
T#:583521
Part#: 11617547185
Ships on Oct 22, 2026
$ 46.99 USD
Free Shipping on orders $49 and up
$ 46.99 USD
Free Shipping on orders $49 and up
Maintain peak engine efficiency and track-ready performance by replacing degraded PCV components with the Burgaflex crankcase vent hose.


Oil Separator Vent Hose
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:53326231
Part#: 11617522933
In Stock
New Item
Sale - Save 15% $ 23.99

This product was last offered at the strikethrough price on
09-16-2026

$ 20.39 USD
Free Shipping on orders $49 and up
Sale - Save 15%
$ 23.99

This product was last offered at the strikethrough price on
09-16-2026

$ 20.39 USD
Free Shipping on orders $49 and up
Febi - Corporate Logo
T#:38452821
Part#: 11157527570
Special Order: No Guaranteed ETA
$ 93.99 USD
$ 93.99 USD
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.
Show More Show Less
E70 Return Pipe
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:52551447
Part#: 11537806706
In Stock
New Item
Sale - Save 20% $ 129.99

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

$ 103.99 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 129.99

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

$ 103.99 USD
Free Shipping on orders $49 and up

Turner Emissions Service Kit - E46 M3
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:555304
Part#: 11157840446KT9
Ships on Jan 25, 2027
$ 426.99

This product was last offered at the strikethrough price on
08-26-2026

$ 412.99 USD
Free Shipping
$ 412.99 USD
Free Shipping

The 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, and hardware.

Fits the following BMWs:
09/2004-2006 E46 BMW M3 - Manual Transmission

Show More Show Less

Turner Emissions Service Kit - E46 M3
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:555305
Part#: 11157840446KT10
Ships on Jan 25, 2027
$ 296.99

This product was last offered at the strikethrough price on
08-26-2026

$ 282.99 USD
Free Shipping
$ 282.99 USD
Free Shipping

The 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, and hardware.

Fits the following BMWs:
2001-09/2004 E46 BMW M3 - Manual Transmission

Show More Show Less
Vaico - Corporate Logo
T#:41492596
Part#: 11157603816
Special Order: No Guaranteed ETA
$ 28.99 USD
Free Shipping on orders $49 and up
Eliminate vacuum leaks with this replacement vacuum pipe for your N20 / N26 powered BMW - Connects to the front passenger side of the N20 engine block

Intake Manifold Cover (PCV)
5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:594546
Part#: 11617501562
Ships on Oct 15, 2026
$ 55.99 USD
Free Shipping on orders $49 and up
An integral part of the emissions system, the PVC valve lets the crank case breathe. This allows proper intake and exhaust flow, resulting in proper running and operation. Often split from underhood heat and age, this vents excess oil into the engine compartment. Replace it now.
Show More Show Less
Crank Case Ventilation Valve - Priced Each
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:53326230
Part#: 11158647299
In Stock
New Item
Sale - Save 20% $ 80.99

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

$ 64.79 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 80.99

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

$ 64.79 USD
Free Shipping on orders $49 and up

Crank Case Vent Hose
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:58234541
Part#: 11157843151
Ships on Mar 16, 2027
New Item
$ 33.99 USD
$ 33.99 USD

Kayser - Corporate Logo
T#:637518
Part#: 11667550007
Special Order: No Guaranteed ETA
$ 52.99 USD
Free Shipping on orders $49 and up
$ 52.99 USD
Free Shipping on orders $49 and up
Bremmen Mounting Grommet Seal - BMW E36 E39 Z3 E34 E38
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
Free Shipping on orders $49 and up
This grommet is located on the back side of the PCV or idle control valve
"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.
Show More Show Less


Crankcase Ventilation Tube
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:362021
Part#: 11157556837
Ships in 2 Business Days
$ 8.04 USD
Free Shipping on orders $49 and up
This crankcase ventilation tube is found leading off the top outlet of the oil separator.
URO Oil Separator Vent Hose - BMW E53 E52 M62 N62 S62
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:373198
Part#: 11157556838
Ships in 2 Business Days
$ 13.99 USD
Free Shipping on orders $49 and up
Replacement oil separator vent hose that runs from the separator
Rein Crankcase Vent Hose - E34
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379791
Part#: 11151735150
Back Ordered
$ 5.23 USD
Free Shipping on orders $49 and up
$ 5.23 USD
Free Shipping on orders $49 and up
Part of the PCV system

Crankcase Ventilation Hose
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:373197
Part#: 11151730507
Back Ordered
$ 10.99 USD
Free Shipping on orders $49 and up
This tube runs from the valve cover breather connector to the reducer.

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
Free Shipping
Sale - Save 11%
$ 208.99

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

$ 186.75 USD
Free Shipping

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

Show More Show Less
Genuine BMW - Corporate Logo
T#:577309
Part#: 11157840446KT5
Back Ordered
$ 613.99 USD
Free Shipping
$ 613.99 USD
Free Shipping