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- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
Breather Hose - 15 x 2.5mm
Sold by the metre
High-quality breather hose with 15 x 2.5mm dimensions, designed for Porsche 924, 924S, and 944 models.
This versatile hose is used across multiple systems,
including fuel tank breather, oil breather, and inlet breather applications,
making it an essential component for maintaining proper ventilation and
pressure balance within the engine and fuel systems.
Fits:
- Porsche 924 2.0L 1976-79
- Porsche 924 2.0L 1980-85
- Porsche 924 Turbo 2.0L 1979-81
- Porsche 924 Turbo 2.0L 1982-84
- Porsche 924 Carrera GT 2.0L 1981
- Porsche 924 Carrera GTS 2.0L 1982
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-85
Diagram ref no 6
Engineered to OEM specifications, this hose offers durability, flexibility, and resistance to heat, oil, and fuel vapours, ensuring reliable performance in demanding engine bay environments. Ideal for maintenance, repair, or restoration of classic Porsche models.
Key Features
• 15 x 2.5mm breather hose specification
• Suitable for Porsche 924, 924S, and 944
• Part number N0203631
• Multi-use: fuel tank, oil, and inlet breather systems
• Resistant to heat, oil, and fuel vapours
• Flexible and durable construction
• OEM-style fit and performance
Function and Purpose
This breather hose serves multiple ventilation roles across the vehicle.
It helps to:
• Vent fuel tank vapours safely
• Regulate pressure in oil breather systems
• Maintain airflow within inlet systems
• Prevent pressure build-up in critical components
• Support efficient engine and fuel system operation
Why Replace Breather Hoses
Breather hoses are exposed to heat, oil, and vapours, leading to wear over time.
Common issues include:
• Cracking or splitting
• Oil or vapour leaks
• Hardening and loss of flexibility
• Reduced ventilation efficiency
Replacing worn hoses ensures proper system balance and prevents performance issues.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
N0203631
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
The OE Match 700mm Long Cloth Covered Rubber Breather Hose is a high-quality replacement hose designed for Porsche 911 engine breather and oil ventilation systems. Manufactured from durable oil-resistant rubber with a traditional cloth-braided outer covering, it replicates the appearance and function of the original factory component while providing reliable performance and longevity.
Fits:
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Diagram Ref No 12
This breather hose forms a vital connection within the engine's crankcase ventilation system, allowing oil vapours and excess pressure to be safely routed away from the engine. The cloth-covered construction helps maintain an authentic factory-correct appearance, making it ideal for both maintenance and restoration projects.
What This Product Does:
- Connects key components within the engine breather and oil ventilation system.
- Allows crankcase gases and oil vapours to circulate correctly.
- Helps regulate internal engine pressure.
- Supports efficient engine operation and oil system performance.
- Reduces the risk of oil leaks caused by excessive crankcase pressure.
Symptoms Of Wear Or Failure:
- Cracks, splits or perished rubber.
- Oil leaks or oil residue around the hose and connections.
- Strong oil vapour smells from the engine bay.
- Hardened, brittle or collapsed hose sections.
- Excessive crankcase pressure.
- Increased oil mist contamination within the engine compartment.
- Poor engine breathing and ventilation performance.
Why Replacement Matters:
- Breather hoses are constantly exposed to engine heat, oil vapours, pressure fluctuations and vibration. Over time, the rubber can harden, crack or deteriorate, compromising the integrity of the ventilation system. A damaged breather hose can lead to oil leaks, pressure build-up, contamination of engine components and increased wear on seals and gaskets.
- Replacing a worn breather hose helps maintain correct crankcase ventilation, prevents unnecessary oil leaks, protects surrounding engine components and ensures the engine's oil system continues to operate as intended. Regular replacement is an important part of maintaining reliability and preserving the performance of your classic Porsche.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG236008A
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Breather Hose – Oil Tank to Crankcase Bottom Half
Maintain the integrity of your air-cooled Porsche's
lubrication and crankcase ventilation system with this OE Match Breather
Hose. Manufactured for precise fitment and long-lasting durability, this replacement
hose restores the correct flow of crankcase vapours and oil mist between the
engine and external oil tank.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Diagram ref no 35B
The dry sump lubrication system used on the classic Porsche 911 relies on a network of breather hoses to regulate crankcase pressure and allow oil vapours to circulate correctly. Over time, the original hose is subjected to constant heat, oil exposure and engine vibration, causing the rubber to harden, crack or become porous. As the hose deteriorates, oil leaks, vacuum leaks and poor crankcase ventilation can develop, leading to untidy engine bays, unpleasant oil smells and reduced engine efficiency.
Replacing this breather hose is an important part of preventative maintenance, particularly during engine rebuilds, oil system servicing or whenever ageing hoses begin to show signs of deterioration.
Manufactured to OE Match standards, this hose provides dependable sealing, correct routing and reliable long-term performance for your classic air-cooled Porsche.
What Does the Breather Hose Do?
This hose forms an essential part of the Porsche dry sump lubrication and crankcase ventilation system.
Its primary functions include:
- Carrying crankcase vapours between the engine and oil tank.
- Helping regulate crankcase pressure.
- Returning oil vapours through the lubrication system.
- Maintaining proper engine breathing.
- Supporting efficient engine operation.
- Preventing oil leakage from deteriorated hose connections.
Correct crankcase ventilation is essential for maintaining engine performance, reducing oil contamination and minimising crankcase pressure.
Why Replace the Breather Hose?
Breather hoses are constantly exposed to hot engine oil, temperature fluctuations and vibration, making them one of the more common ageing rubber components on classic Porsche engines.
Common reasons for replacement include:
- Cracked or hardened rubber.
- Oil seepage or external leaks.
- Hose becoming soft or swollen from oil exposure.
- Split hose walls.
- Vacuum leaks.
- Engine restoration.
- Oil system refurbishment.
- Preventative maintenance.
Replacing the hose before failure helps maintain the integrity of the lubrication system while preventing messy oil leaks.
Symptoms of a Failing Breather Hose
A deteriorating breather hose may cause:
- Oil leaks around the oil tank or crankcase.
- Oil smell from the engine compartment.
- Visible cracks or perished rubber.
- Increased crankcase pressure.
- Oil residue around hose connections.
- Vacuum leaks.
- Dirty engine bay caused by oil mist.
- Reduced crankcase ventilation efficiency.
Replacing the hose restores proper crankcase ventilation and helps protect the engine from unnecessary oil loss and contamination.
Benefits
- Restores efficient crankcase breathing.
- Helps maintain correct crankcase pressure.
- Reduces the risk of oil leaks.
- Supports reliable dry sump lubrication system operation.
- Straightforward direct replacement.
- Long-lasting, durable construction.
When replacing breather hoses, it is advisable to inspect the remaining crankcase ventilation hoses, hose clips and oil tank connections, as these components often deteriorate together due to age and heat exposure.
Why Choose OE Match Engine Breather Components?
OE Match engine breather components are manufactured to provide reliable sealing, precise fitment and excellent resistance to heat and oil exposure. Designed specifically for classic Porsche applications, they help maintain the efficiency of the dry sump lubrication and crankcase ventilation system while supporting long-term engine reliability. OE Match components are trusted by enthusiasts and specialist workshops undertaking routine servicing, engine rebuilds and concours restorations.Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010739409
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
Fits:
Porsche 911 SC 3.0L 1978-83
Diagram ref no 43
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91111027602
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
Fits:
Porsche 911 1980-83
Click 'Zoom in' for large parts diagram.
Diagram ref no 35A
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010739410
The product you are viewing cross references to these numbers