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Breather Hose. Porsche 996 / 997.1 1998-08 - 99610623053
99610623053
Vehicle Group
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Information
Breather Hose.
Restore the engine ventilation routing on your Porsche 911 (996 / 997 series) with this genuine breather hose. This hose is located at the top of the oil cooler and connects the breather or ventilation circuit, ensuring proper air/oil vapour flow and system integrity.
Fits:
Symptoms Of Wear Or Failure:
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99610623053
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Restore the engine ventilation routing on your Porsche 911 (996 / 997 series) with this genuine breather hose. This hose is located at the top of the oil cooler and connects the breather or ventilation circuit, ensuring proper air/oil vapour flow and system integrity.
Fits:
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
Diagram Ref No 30
What This Product Does:
- The breather hose is part of the engine’s ventilation or crankcase/air-oil management system. In this case, it's described as being located at the top of the oil-cooler, which may mean it connects the crankcase ventilation or engine breather output back into the intake or another system.
- Its main function: to provide a path for gases (blow-by, vapor, pressure) from the engine or oil-cooler area back into the intake system or safe discharge path.
- The hose must withstand engine heat, pressure/vacuum cycles, vibrations, and exposure to oil or vapour, and provide a leak-free connection.
- Proper functioning helps maintain correct crankcase pressure, prevents undue pressure build-up or vacuum, helps control emissions, keeps the oil cooler circuit operating correctly, and ensures the engine’s ventilation system does not allow unintended air or oil vapour to escape or enter in the wrong way.
Symptoms Of Wear Or Failure:
- Oil vapour or smell around the engine compartment, especially near the oil cooler area or hose routing, indicating leakage of crankcase gases.
- Visible cracks, splits, brittleness, or hose collapse — old hoses can harden, crack or collapse internally causing blockage or leakage.
- Unusual engine behaviour: e.g., increased oil consumption, engine smoking slightly, or unusual intake/vacuum behaviour — if ventilation is compromised.
- Check engine or emission warnings: A compromised breather hose may lead to induction of unmetered air or vapours, affecting engine management.
- Oil cooler area contamination: Because the hose is described as located at the top of the oil cooler, if oil or vapour-contaminated deposits are visible there, the hose may be failing.
- Maintains correct engine ventilation: A good breather hose ensures proper crankcase/ventilation flow, and prevents pressure build-up or vacuum conditions that can lead to leaks or part failures (seals, gaskets).
- Protects the oil-cooler circuit and engine components: Because this hose is located at the oil-cooler top, replacing it helps ensure the oil cooler and associated hoses remain uncontaminated by vapour or oil mist escaping via degraded hoses.
- Improves reliability: Since these hoses are subject to heat, pressure and ageing, replacing them proactively avoids sudden failure, which could leave the car stranded or cause engine issues.
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Related, superseded, cross reference or alternative numbers for comparison.
99610623053
99610623053
99610623052
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Price: £54.68
In stock
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Vehicle Group
- 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
Information
Non Return Valve Crankcase Oil Breather.
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
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9461072
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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
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Vehicle Group
- 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
Information
Bracket For Crankcase Breather Pipe.
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
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94610702976
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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
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Orderable
Vehicle Group
- 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
Information
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.
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Prices from: £85.50