Breather Pipes
Engine crankcase vent breather valve Kit
Crankcase Breather Kit Overview The crankcase breather kit includes the breather valves (also called the air/oil separator or PCV valve) and the breather hoses. These components are typically made of plastic, making them prone to cracking or failure over time. Replacing or maintaining this system proactively improves engine reliability and ensures optimal performance.
Signs of a failing crankcase breather system include air or oil leaks, fouled spark plugs, or blue smoke from the exhaust. If you notice any of these symptoms, inspect the breather system and replace components as needed.
Fits:
- Porsche Macan S Petrol 3.0L V6 340Bhp
- Porsche Macan GTS Petrol 3.0L V6 360Bhp
- Porsche Macan Turbo 3.6L V6 400Bhp
Engine Crankcase Breather Hose Kit
The crankcase breather hose is a key part of the engine’s positive crankcase ventilation (PCV) system. It channels pressurized air from the engine crankcase to the PCV valve (air/oil separator). The PCV valve captures and removes oil vapors, draining them back into the engine while sending the remaining pressurized air to the intake for combustion.
Positive crankcase pressure naturally develops during engine operation. Because the hose is constantly exposed to heat, pressure, and oil vapors, it is one of the most common failure points in the PCV system. A damaged or worn hose can impact engine performance, emissions compliance, and overall reliability.
Common Crankcase Breather Hose Failure Symptoms
Cracks, breaks, or leaks: Constant exposure to heat, pressure, and oil vapors can degrade the plastic or rubber, causing air leaks. External damage can also contribute.
Broken connectors or clips: Plastic connectors and securing clips may become brittle over time, breaking during removal or routine maintenance.
Holes or splits in the hose: Soft rubber or brittle plastic can develop visible splits or holes, often accompanied by other issues listed below.
Check Engine Light (CEL): Excess unmetered air from a failed hose can trigger an air intake leak fault or related diagnostic codes.
Engine misfire: Severe air leaks can cause rough running or misfires, a common side effect of a faulty hose or PCV valve.
Oil residue: Escaping vapors often leave visible oil on the hose, engine block, or surrounding components. In severe cases, burnt oil may be noticeable, and the area may require degreasing to locate the source.
Maintaining a healthy crankcase breather system is essential for engine longevity, smooth operation, and proper emissions control.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94610723933KIT
The product you are viewing cross references to these numbers
- Porsche 95B.1 Macan S Petrol 3.0L V6 340Bhp 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 360Bhp 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 400Bhp 2014-18
Fits:
Porsche 92A Cayenne (958) 3.6L Petrol 2011>>2018
Cars With Engine Codes:
CURA / CUR / CXZA / CXZ
Porsche 95B.1 Macan S / GTS 3.0L Petrol MKI 2014>>2018
Porsche 95B.1 Macan Turbo 3.6L MKI 2014>>2018
Cars With Engine Codes:
CTMA / CTM / CTLA / CTL / DCNA / DCN / DHKA / DHK
Porsche 970.2 Panamera S / 4S Turbo 3.0L V6 MKII 2014>>2016
Cars With Engine Codes:
CWDA / CWD / CWFA / CWF
Diagram Ref No 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94610702976
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne V6 3.6L Petrol 300Hp 2010-17
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
- Porsche 95B.1 Macan S Petrol 3.0L V6 340Bhp 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 360Bhp 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 400Bhp 2014-18
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 95B.1 Macan S / GTS 3.0L Petrol MKI 2014>>2018
Porsche 95B.1 Macan Turbo 3.6L MKI 2014>>2018
Cars With Engine Codes:
CTMA / CTM / CTLA / CTL / DCNA / DCN / DHKA / DHK
Diagram Ref No 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94610723933
The product you are viewing cross references to these numbers
- Porsche 95B.1 Macan S Petrol 3.0L V6 340Bhp 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 360Bhp 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 400Bhp 2014-18
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 95B Macan S / GTS / Turbo 2014>>2018
Porsche 958 Cayenne / GTS 3.6L 2015>>2018
Porsche 970.2 Panamera / S 3.0L 2014>>2016
Diagram Ref No 1 And 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9461072
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne V6 3.6L Petrol 300Hp 2010-17
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
- Porsche 95B.1 Macan S Petrol 3.0L V6 340Bhp 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 360Bhp 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 400Bhp 2014-18
Shop Securely
12 Month Warranty
Worldwide Delivery
Non-Return Valve – Crankcase Oil Breather
The crankcase oil breather non-return valves is an
essential part of your Porsche’s engine ventilation system. Designed to OEM
specifications, they regulate crankcase pressure, prevent oil vapour backflow,
and ensure smooth, efficient engine operation. Replacing both valves together
restores proper crankcase breathing and protects your engine from leaks and
excess oil consumption.
Fits:
- Porsche Cayenne V6 3.6L Petrol 300Hp
- Porsche Panamera S V6 Turbo 3.0L 2WD (420Hp)
- Porsche Panamera S V6 Turbo 3.0L 2WD Executive
- Porsche Panamera 4S V6 Turbo 3.0L 4WD (420Hp)
- Porsche Panamera 4S V6 Turbo 3.0L 4WD Executive
- Porsche Macan S Petrol 3.0L V6 340Bhp
- Porsche Macan GTS Petrol 3.0L V6 360Bhp
- Porsche Macan Turbo 3.6L V6 400Bhp
What the Non Return Valves Do
- Maintain Correct Pressure: Allow gases to escape while preventing backflow into the crankcase.
- Improve Engine Efficiency: Reduce oil vapour re-entry, helping cleaner combustion.
- Protect Components: Prevent pressure build-up that can damage seals and gaskets.
Symptoms of Faulty Breather Valves
- Excessive oil consumption.
- Blue smoke from the exhaust.
- Oil leaks around gaskets and seals.
- Rough idle, misfires, or poor performance.
- Strong smell of oil fumes in the engine bay or cabin.
Common Reasons for Failure
- Oil Sludge & Contamination: Causes the valve to stick open or closed.
- Rubber & Spring Wear: Degradation over time reduces effectiveness.
- Lack of Maintenance: Old oil accelerates valve failure.
- High Mileage Stress: Heat cycles and pressure changes weaken components.
Why Replace?
Restores proper crankcase ventilation.
Prevents oil leaks and excess pressure in the engine.
Reduces harmful emissions and oil consumption.
Protects seals, gaskets, and other critical engine parts.
Improves reliability, performance, and long-term durability.
Why Buy from Design 911?
- Specialist Supplier: We are Porsche parts experts with years of experience.
- OEM Quality & Fitment: Parts meet or exceed original specifications.
- Trusted Worldwide: Thousands of Porsche owners and workshops rely on us.
- Comprehensive Support: Expert advice, fast shipping, and hassle-free service.
- One-Stop Shop: Whether it’s engine, body, or interior components, Design 911 has you covered.
Ideal For: Replacing worn crankcase valves during servicing or resolving oil consumption, leaks, or performance issues.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9461072
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne V6 3.6L Petrol 300Hp 2010-17
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
- Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
- Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
- Porsche 95B.1 Macan S Petrol 3.0L V6 340Bhp 2014-18
- Porsche 95B.1 Macan GTS Petrol 3.0L V6 360Bhp 2014-18
- Porsche 95B.1 Macan Turbo 3.6L V6 400Bhp 2014-18
Shop Securely
12 Month Warranty
Worldwide Delivery
Engine Oil System Breather Pipes – Precision Ventilation for Porsche Performance
The engine oil breather system plays a crucial role in maintaining internal pressure balance, oil circulation, and overall engine health. The breather pipes allow gases, vapour, and excess pressure to escape from the crankcase, preventing oil contamination, leaks, and performance loss.
At Design911, we supply a comprehensive selection of oil system breather pipes and ventilation components designed for Porsche engines across all generations. Built from high-quality, oil- and heat-resistant materials, our breather pipes are engineered for long service life, durability, and a direct-fit installation — ensuring your Porsche continues to run smoothly under all driving conditions.
Whether you’re maintaining a daily-driven 911 or restoring a classic air-cooled model, our breather pipes help safeguard your engine’s lubrication system and performance.
What Do Engine Oil Breather Pipes Do?
Oil breather pipes are essential to the proper function of your Porsche’s oil system. They manage pressure and vapour within the crankcase, ensuring oil flow remains consistent and clean.
Core Functions:
- Vent
crankcase pressure to maintain oil system stability.
- Prevent
oil leaks by balancing internal engine pressure.
- Reduce
contamination by separating oil vapour from blow-by gases.
- Improve efficiency by maintaining clean airflow and optimal oil return.
Properly functioning breather pipes ensure your Porsche’s engine stays free of excessive pressure and sludge build-up, promoting smooth operation and extended engine life.
Why Do Oil Breather Pipes Fail?
Over time, breather pipes are exposed to intense heat, oil vapour, and pressure changes that can cause deterioration and leaks.
Common Causes of Failure Include:
- Cracking
or hardening of rubber or plastic due to heat cycles.
- Oil
residue build-up, leading to restricted airflow.
- Blockages
caused by sludge or carbon deposits.
- Loose
fittings or seals allowing air or oil leaks.
- Age-related wear in high-mileage or older engines.
Symptoms of failing breather pipes include oil leaks, rough idling, increased crankcase pressure, or smoke from the exhaust — all signs that the ventilation system is compromised.
Why Replace with Precision-Engineered Breather Pipes?
Replacing worn or damaged breather pipes is essential for maintaining optimal oil pressure and engine performance. Our precision-fit, high-durability replacements are designed to restore proper ventilation and prevent costly oil-related issues.
Key Benefits:
- Restores optimal crankcase ventilation and pressure control.
- Prevents oil leaks and blow-by contamination.
- Improves idle stability and engine efficiency.
- Constructed from heat- and oil-resistant materials.
- Direct-fit
compatibility for classic and modern Porsche engines.
- Ideal for regular maintenance or full engine rebuilds.
These parts are engineered to deliver long-term reliability and protect your Porsche’s engine from unnecessary wear.
Highlights:
- Precision-engineered oil breather pipes for Porsche engines.
- High-quality
materials for maximum durability and heat resistance.
- Direct-fit
replacements ensuring leak-free performance.
- Improves oil system efficiency and longevity.
- Compatible with air-cooled and water-cooled Porsche models.
- Perfect for rebuilds, maintenance, or performance upgrades.
