Breather Pipes

Breather Hose. From oil tank to the air box (ridged box)



Fits:
Porsche 911 1965-83

Click picture for large parts diagram.
Diagram Ref No 37.

Breather hose oil tank to crankcase bottom half.

Fits:
Porsche 911 1980-83

Diagram ref no 35B

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93010739409

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Breather hose oil tank to crankcase top half.



Fits:
Porsche 911 1980-83

Click 'Zoom in' for large parts diagram.
Diagram ref no 35A

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93010739410

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Breather hose oil tank to crankcase top half.



Fits:
Porsche 911 1980-83

Click 'Zoom in' for large parts diagram.
Diagram ref no 35A

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93010739410

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Breather hose. 645mm

Fits:
Porsche 911 1965-83

This hose runs from the oil reservoir tank to the rear of the engine. Fits all 2.7L and 3.0L naturally aspirated 911 models built between 1974 and 1983, as well as all 3.0L 911 Turbo models built between 1976 and 1977.

This product supersedes Porsche's old part numbers:
- 90110739300
- 90110739400
- 90110739301
- 99923600850
- 00004320516

Diagram Ref No 12

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PCG236008A

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700mm Long Cloth Covered Rubber Breather Hose.
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
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PCG236008A

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Breather hose. From oil tank.

Fits:
Porsche 911 1984-89

Diagram Ref No 28.

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93020738501

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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
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93020738501

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Breather hose. From oil tank.

Fits:
Porsche 911 1984-89

Diagram ref no 26

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93020738601

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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.

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93020738601

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Crankcase bleeding oil line.



Fits:
Porsche 911 (930) Turbo 1978-89

Click 'Zoom in' for large parts diagram.
Diagram ref no 25

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93010739701

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Engine crankcase breather hose, Fits from the auxiliary air regulator to the air box elbow.



Fits:
Porsche 911 SC 3.0L 1978-83

Click 'Zoom in' for large parts diagram.
Diagram ref no 43

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91111027602

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Engine crankcase breather hose, Fits from the auxiliary air regulator to the air box elbow.

Fits:
Porsche 911 SC 3.0L 1978-83

Diagram ref no 43

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91111027602

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Sleeve adapter boot for breather hose.



Fits:
Porsche 911 1965-83

Click 'Zoom in' for large parts diagram.
Diagram ref no 47

Related reference numbers
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90110769500

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Sleeve adapter boot for breather hose.

Fits:
Porsche 911 1965-83

Diagram ref no 47

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90110769500

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