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Oil Separation & Breather System for BMW 3 Series E91 (2006-2012)

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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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CCV/PCV Breather Hoses (13)

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Bremmen Crankcase Vent Hose - E60 E70 E82/88 E9X N52 3.0L

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T#:640155

Part#: 11157559528

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Sale - Save 20% $ 48.99

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

$ 39.16 USD

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$ 39.16 USD

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This valve cover vent hose helps to vent the crankcase fumes on BMW's with the N51 / N52 6 cylinder engines. If replacing the valve cover, we recommend purchasing this item as well as it often will break while removing it from the valve cover.

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Angle Connector With Heating Element

T#:556608

Part#: 11618638014

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$ 39.99 USD

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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.

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Extraction Line

10X Entries Into Our F80 M3 Sweepstakes

T#:30629688

Part#: 11157537701

In Stock

Sale - Save 21% $ 28.99

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

$ 22.84 USD

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$ 28.99

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$ 22.84 USD

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Oil Separator Vent Hose

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T#:33746535

Part#: 11617559530

Ships on Oct 20, 2026

Sale - Save 20% $ 42.99

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

$ 34.26 USD

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$ 42.99

This product was last offered at the strikethrough price on
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$ 34.26 USD

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URO Crankcase Vent Hose - 11157522931

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T#:26171673

Part#: 11157522931

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$ 39.79 USD

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$ 39.79 USD

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Connecting the cyclone oil separator to the engine valve cover, this hose is crucial for maintaining optimal engine performance. Over time, exposure to heat from engine components can cause the plastic hose to become brittle, resulting in cracks, tears, or splits. These issues can lead to vacuum and oil leaks, triggering a check engine light.

High-quality replacement for BMW crankcase vent hose
Ensures optimal engine performance
Resistant to heat and wear
Helps prevent vacuum and oil leaks
Easy to install

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Oil Separator Valve

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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

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Genuine BMW Extraction Line - E60 E91 E90 E91 N52 3.0L, Z4 N52 3.0L ...

T#:22212

Part#: 11157537701

Ships in 1-2 days

13% off MSRP $ 63.92

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

$ 55.74 USD

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13% off MSRP

$ 63.92

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

$ 55.74 USD

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

Fits BMW Engines including:
N52

Rein Crank Case Vent Hose - E60, E82, E83, E88, E90, E91, E92, E93, Z...

2X Entries Into Our F80 M3 Sweepstakes

T#:402018

Part#: 11157559528

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$ 48.99 USD

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Over time this hose can become clogged and blocked up causing running problems. This is a direct factory replacement for the PCV hose.

ECS Tuning Baffled Oil Catch Can - 8oz

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T#:13496655

Part#: 003779ECS05-02

In Stock

Sale - Save 10% $ 238.99

This product was last offered at the strikethrough price on
06-14-2026

$ 215.09 USD

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This product was last offered at the strikethrough price on
06-14-2026

$ 215.09 USD

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Upgrade Your BMW with ECS Baffled Oil Catch Can

Modern emission regulations require a closed PCV/Breather system for cleaner operation. However, inefficient oil particle capture can lead to excessive oil vapor ingestion, causing carbon buildup, reduced performance, and fuel economy. ECS Tuning's updated ECS Baffled Oil Catch Can, now with an easy-to-empty 1/4" drain fitting, is engineered to collect toxic blow-by gases, minimize carbon deposits, and reduce oil contamination within engine oil. Recirculating oil vapor ensures emissions compliance without venting to the atmosphere.

Key Features:
Highly Efficient Oil Separator: Strategically positioned 4 chamber baffle system maximizes oil/air separation and minimizes oil droplets in the intake tract.
Integrated Dipstick: Knurled and black anodized oil dipstick simplifies oil volume inspection.
Reservoir: Available in 6oz or 8oz capacity with a 1/4" NPT drain plug fitting.
Serviceable: Easily removable baffle plates and drain plug for cleaning.
Easy/Customizable Installation: Combine with the ECS Universal Bracket Kit for simplified installation and adjustable mounting locations.
Leak-Free Fittings: Machined -10AN ORB (O-Ring Boss) fittings available for secure connections (fittings sold separately).

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Crankcase Oil Separator Hose - E9x, E60, E85 with N52 engine ...

T#:20631

Part#: 11157522931

In Stock

21% off MSRP $ 154.99

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

$ 125.99 USD

Limited Qty Sale

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21% off MSRP

$ 154.99

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

$ 125.99 USD

Limited Qty Sale

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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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Rein Crankcase Vent Hose

2X Entries Into Our F80 M3 Sweepstakes

T#:17804807

Part#: 11157522931

In Stock

$ 44.99

This product was last offered at the strikethrough price on
08-23-2026

$ 38.99 USD

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$ 38.99 USD

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Manufactured with high-quality materials to withstand heat, dirt, oil, and other debris.

Vacuum Pipe - E90, E91, E92, E93

T#:37145

Part#: 11667551621

Ships in 1-2 days

4% off MSRP $ 51.99

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

$ 49.99 USD

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4% off MSRP

$ 51.99

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

$ 49.99 USD

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

Fits BMW Engines including:
N51,N52N

OEM Rein Oil Separator Vent Hose - E60/61 E90/91 Z4

2X Entries Into Our F80 M3 Sweepstakes

T#:13029

Part#: 11617559530

Ships in 4 Business Days

$ 66.99

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

$ 43.99 USD

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$ 43.99 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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Bremmen Parts O Ring

10X Entries Into Our F80 M3 Sweepstakes

T#:558205

Part#: 11617533329

In Stock

Sale - Save 30% $ 6.99

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

$ 4.89 USD

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$ 6.99

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$ 4.89 USD

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Seals the PCV angle connector to the intake manifold

Engine Breather Hose

T#:57725177

Part#: 11157522931

In Stock

$ 52.99 USD

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$ 52.99 USD

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Maintain peak engine health and keep your crankcase ventilation system operating seamlessly with this high-grade engine breather hose from Burgaflex.

OEM Rein Oil Separator Vent Hose - E60/1 E90/1 N52

2X Entries Into Our F80 M3 Sweepstakes

T#:402020

Part#: 11617522933

Ships in 2 Business Days

$ 19.99 USD

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$ 19.99 USD

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If your BMW has a damaged vent hose, be sure to replace it to restore functionality of this rather important emissions system.

Oil Separator Vent Hose

10X Entries Into Our F80 M3 Sweepstakes

T#:53326231

Part#: 11617522933

In Stock

Sale - Save 15% $ 23.99

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

$ 20.39 USD

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Sale - Save 15%

$ 23.99

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

$ 20.39 USD

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Oil Separation & Breather System
- CCV/PCV Breather Hoses (13)

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