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Oil Separation & Breather System for BMW 5 Series E60 (2004-2010)

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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 (10)

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

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T#:640155

Part#: 11157559528

In Stock

Sale - Save 20% $ 48.99

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05-03-2026

$ 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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Blow-By Vent Hose

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T#:30629687

Part#: 11157553949

In Stock

Sale - Save 20% $ 43.99

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

$ 35.08 USD

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Bav Auto Crankcase Ventilation Return Hose - E46 E39 E60 Z3

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T#:638072

Part#: 11617504536

In Stock

Sale - Save 20% $ 26.99

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

$ 21.59 USD

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This is the BMW crankcase return line that goes from the intake manifold to the top CCV connecting hose. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Bav Auto Crankcase Pressure Regulator Valve - BMW M52 M54

10X Entries Into Our F80 M3 Sweepstakes

T#:640207

Part#: 11617501566

In Stock

Sale - Save 20% $ 32.99

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

$ 26.39 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. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Oil Separator Valve

10X Entries Into Our F80 M3 Sweepstakes

T#:8677203

Part#: 11617531423

Ships on Oct 14, 2026

Sale - Save 4% $ 69.99

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05-03-2026

$ 67.20 USD

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Oil Separator Vent Hose

10X Entries Into Our F80 M3 Sweepstakes

T#:33746535

Part#: 11617559530

Ships on Oct 13, 2026

Sale - Save 20% $ 42.99

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05-03-2026

$ 34.26 USD

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Extraction Line

10X Entries Into Our F80 M3 Sweepstakes

T#:30629688

Part#: 11157537701

In Stock

Sale - Save 21% $ 28.99

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05-03-2026

$ 22.84 USD

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ECS Tuning Baffled Oil Catch Can - 8oz

10X Entries Into Our F80 M3 Sweepstakes

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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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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ECS Tuning N54 PCV Valve Upgraded - BMW N54 3.0L

10X Entries Into Our F80 M3 Sweepstakes

T#:4154602

Part#: 090745ECS09

Special Order: No Guaranteed ETA

Sale - Save 25% $ 105.99

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

$ 79.49 USD

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The OEM plastic Positive Crankcase Ventilation (PCV) valve does not hold pressure well, even when brand new. This means that when you are in boost conditions, the highly pressurized PCV valve leaks charged air back into the crankcase. Depending on the condition of your PCV valve, this can range from irritating to dangerous. Additionally, if your valve cover is cracked, loose, or has a bad gasket, you are likely experiencing a pressure leak either internally or externally, as well as potential oil loss issues. ECS Tuning now offers a solid aluminum PCV valve upgrade designed to address these issues by preventing leaks and outlasting the standard BMW-designed PCV! The internal components of this aluminum PCV valve fit tighter than the OE design and can withstand significantly more abuse, perfect for high mileage N54s, N54s that have been tuned, or N54s with upgraded turbos (larger twin or big single turbo builds). This may not be your last PCV Valve, but it will certainly outlast both the Genuine BMW and other common aftermarket alternatives!

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Crankcase Ventilation Hose

10X Entries Into Our F80 M3 Sweepstakes

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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Oil Separator Hose - E46, Z4

10X Entries Into Our F80 M3 Sweepstakes

T#:579880

Part#: 55080

In Stock

Sale - Save 20% $ 24.99

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$ 19.99 USD

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Cold climate version for extra insulation! Fits all E46 and Z4 chassis equipped with an M54 engine.

Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46

10X Entries Into Our F80 M3 Sweepstakes

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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Crankcase Vent Hose - From Valve Cover to Oil Separator - Fit BMWs with the M52 or M54 6 cylinder engine

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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Seals the PCV angle connector to the intake manifold

Bav Auto Upper Oil Separator Vent Tube - E36 E46 E60 E84 Z3 Z4 M54 M5...

10X Entries Into Our F80 M3 Sweepstakes

T#:640502

Part#: 11617504535

In Stock

Sale - Save 20% $ 24.99

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

$ 19.99 USD

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$ 19.99 USD

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Runs from the top of the oil separator up to rear of the intake manifold. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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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 (10)

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