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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Related, superseded, cross reference or alternative numbers for comparison.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 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Oil Breather Hose from Oil Tank
Maintain the integrity of your Porsche 911's crankcase
ventilation system with the Oil Breather Hose 93020738501. Designed to meet
original Porsche specifications, this essential engine hose helps manage
crankcase pressure and directs oil vapours through the engine's breather
system, contributing to optimal engine performance, reduced emissions, and
long-term reliability.
Fits:
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Diagram Ref No 2
Over time, breather hoses can become brittle, cracked, or contaminated due to prolonged exposure to heat and oil vapours. Replacing a worn oil breather hose helps prevent vacuum leaks, oil seepage, and potential engine running issues while ensuring the ventilation system operates as intended.
Suitable for a range of Porsche 911 models, this replacement breather hose is manufactured to provide a precise fit and dependable performance, making it an ideal solution during engine maintenance, restoration projects, or preventative servicing.
Key Features
- Direct replacement for Porsche part number 93020738501
- Helps maintain correct crankcase ventilation
- Supports efficient engine breathing and pressure regulation
- Resistant to heat, oil vapours, and engine bay conditions
- Precision fit for straightforward installation
- Ideal for maintenance, repair, and restoration projects
Why Replace Your Oil Breather Hose?
A deteriorated breather hose can contribute to vacuum leaks, poor idle quality, increased oil residue around the engine bay, and reduced ventilation efficiency. Replacing ageing hoses helps maintain engine health and supports the reliable operation expected from your Porsche 911.
Porsche 911 Engine Breather Hoses & Crankcase Ventilation Parts
Keeping your Porsche 911's crankcase ventilation system in peak condition is essential for engine performance, longevity, and emissions control. At Design911, we supply a comprehensive range of Porsche 911 breather hoses, crankcase ventilation pipes, oil separator hoses, engine ventilation components, and OEM replacement engine hoses suitable for classic and modern Porsche 911 models.
Whether you're carrying out a full engine rebuild, restoring an air-cooled Porsche, or replacing worn ventilation components during routine maintenance, choosing high-quality breather system parts helps prevent vacuum leaks, oil contamination, and crankcase pressure issues.
Our range includes genuine Porsche breather hoses, replacement oil ventilation pipes, crankcase breather tubes, air-oil separator connections, engine vent hoses, and related Porsche 911 engine management components designed for reliable fitment and long service life.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93020738501
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Oil Breather Hose
The Porsche 911 Oil Breather Hose is a vital
component of the engine's crankcase ventilation system, helping to regulate
internal engine pressure and safely route oil vapours through the breather
circuit. Manufactured to meet Porsche specifications, this replacement hose
ensures reliable operation while supporting engine efficiency and longevity.
Fits:
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Diagram ref no 26
Over time, breather hoses can deteriorate due to continuous exposure to heat, oil residue, and engine bay contaminants. Cracks, splits, or hardened rubber can lead to vacuum leaks, oil mist escape, poor idle quality, and reduced engine performance. Replacing worn breather hoses with the correct specification part helps maintain optimal engine operation and prevents avoidable maintenance issues.
Whether you are carrying out preventative maintenance, an engine rebuild, or a full Porsche restoration, the 93020738601 oil breather hose provides the correct fitment and dependable performance expected from a quality Porsche replacement component.
Product Features
- Direct replacement for Porsche part number 93020738601
- Supports correct crankcase ventilation system operation
- Helps maintain proper engine pressure regulation
- Resistant to oil vapours, engine heat, and ageing
- Precision fit for straightforward installation
- Suitable for Porsche 911 maintenance and restoration projects
Benefits of Replacing Your Breather Hose
A damaged or ageing oil breather hose can negatively affect engine performance by allowing vacuum leaks and disrupting airflow within the crankcase ventilation system. Installing a new breather hose helps maintain engine efficiency, reduces the risk of oil leaks, and supports long-term reliability.
Porsche 911 Oil Breather Hoses & Crankcase Ventilation Components
Design911 offers a comprehensive range of Porsche 911 oil breather hoses, crankcase ventilation components, engine vent pipes, air-oil separator hoses, vacuum hoses, and genuine Porsche replacement parts for classic and modern Porsche 911 models.
The crankcase ventilation system plays a crucial role in maintaining engine health by managing internal pressure and recirculating oil vapours. Worn or damaged breather components can contribute to oil leaks, rough running, poor emissions performance, and reduced engine efficiency.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93020738601
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