Please wait… 
Please wait while we process your order,
do not press the back button… 
Design911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://d911api.datadial.net/images/schemaLogo.png https://d911api.datadial.net/images/schemaLogo.png https://d911api.datadial.net Facebook Instagram
Porsche specialists based in the UK
Porsche Cayenne 9PA1 (957) 2007-2010 957 Cayenne S / GTS 4.8L 2007-10 Engine Rebuild Parts Oil System Parts

Breather Pipes

Breather Pipes

DISPLAYING 1 to 3 (of 3 products)
Breather Line. Porsche 957 Cayenne S / GTS / Turbo / Turbo S 4.8L 2007–10 - 94810524551
2
Breather Line. Porsche 957 Cayenne S / GTS / Turbo / Turbo S 4.8L 2007–10
Special Order item
94810524551
Product Information
Product Information
Breather Line. 

The Genuine Porsche Engine Breather Line is a replacement crankcase ventilation component for the Porsche Cayenne 957 Turbo.

Fits:

  • Porsche 957 Cayenne S / GTS 4.8L 2007-10
  • Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10  

Diagram Ref No 10

During normal engine operation, a small amount of combustion gas passes the piston rings and enters the crankcase. The breather system manages these blow-by gases and oil vapours, routing them through the engine ventilation system rather than allowing excessive pressure to build inside the crankcase.

The breather line provides a sealed passage for these vapours and is therefore important for maintaining correct crankcase pressure, controlling oil vapour and supporting efficient engine operation.

With age and repeated exposure to engine heat, oil vapour and pressure changes, breather lines can become brittle, cracked, loose or internally restricted. Replacing a deteriorated line helps restore the integrity of the crankcase ventilation system.

What This Product Does:

  • Routes crankcase gases and oil vapours through the engine ventilation system.
  • Helps prevent excessive pressure building inside the crankcase.
  • Maintains a sealed pathway within the breather system.
  • Supports correct operation of the crankcase ventilation system.
  • Helps protect engine seals and gaskets from excessive crankcase pressure.
  • Returns engine vapours to the appropriate ventilation or intake circuit.
  • Supports effective emissions control by containing crankcase vapours.
  • Helps maintain consistent engine operation.
  • Replaces a cracked, brittle, leaking or damaged original breather line.

The breather system is designed to manage gases generated inside the crankcase and prevent uncontrolled pressure build-up during engine operation.

Symptoms Of Wear Or Failure:
Possible symptoms include:

  • Rough or unstable idle.
  • Hissing or whistling noises from the engine bay.
  • Engine vacuum or air leaks.
  • Increased oil consumption.
  • Oil leaks developing around engine seals or gaskets.
  • Oil mist or residue around breather connections.
  • Visible cracking or splitting of the breather line.
  • Hardened or brittle hose material.
  • Loose or damaged connections.
  • Engine management warning light.
  • Mixture-related or airflow fault codes.
  • Poor engine response.
  • Increased crankcase pressure.
  • Oil vapour or fumes around the engine compartment.
  • Smoke from the exhaust in some cases if the ventilation system is malfunctioning.

These symptoms are not exclusive to the breather line. Faults with the crankcase ventilation valves, oil separator, intake system or associated hoses can produce similar symptoms and should also be checked.

Why Replacement Matters:
The engine breather system needs to remain sealed and unrestricted to regulate crankcase pressure correctly.

If the breather line cracks or becomes disconnected, unwanted air can enter the system while crankcase vapours may escape through an unintended path.

If the line becomes blocked or restricted, crankcase pressure may increase.

Replacing a faulty breather line helps restore:

  • Correct crankcase ventilation.
  • Proper pressure regulation.
  • A sealed engine ventilation circuit.
  • More consistent engine operation.
  • Correct routing of oil vapours and blow-by gases.
  • Reduced risk of pressure-related oil leaks.
  • Reliable operation of associated PCV components.



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

94810524551
94810524551

The product you are viewing cross references to these numbers
Seal for Engine Crankcase Vent Valve. Porsche Cayenne 957 4.8L S / GTS
2
Seal for Engine Crankcase Vent Valve. Porsche Cayenne 957 4.8L S / GTS
Special Order item
94810743900
Product Information
Product Information
Seal for engine crankcase vent valve. Two required per vehicle, sold each. 

O-RING SIZE (MM): 20 x 3.8 

 

Fits: 
Porsche Cayenne 957 4.8L S / GTS 2007-10 

Click 'Zoom in' for large parts diagram.
Diagram ref no 17
Thrust Ring For Breather Line Tank Ventilation. Porsche 92A / 9PA1 Cayenne / 970 Panamera 4.8L 2007-18 - 94811022100
3
Thrust Ring For Breather Line Tank Ventilation. Porsche 92A / 9PA1 Cayenne / 970 Panamera 4.8L 2007-18
Special Order item
94811022100
Product Information
Product Information
Thrust Ring For Breather Line Tank Ventilation.

Fits:
Porsche 92A Cayenne (958) 4.8L 2011>>2018
Cars With Engine Codes:

4802 / 4852 / CFTB / CFT / CYXA / CYX

Porsche 9PA1 Cayenne (957) 4.8L 2007>>2010
Cars With Engine Codes:
4801 / 4851

Porsche 970 Panamera 4.8L MKI / MKII 2010>>2016
Cars With Engine Codes:
4820 / 4840 / 4870 / CXPA / CXRA / CXR / CWBA / CWB / CWCA / CWC

Porsche 970 Panamera 3.6L MKI / MKII 2010>>2016
Cars With Engine Codes:
4620 / 4640 / CWAA / CXNA

Diagram Ref No 5



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

94811022100
94811022100

The product you are viewing cross references to these numbers
DISPLAYING 1 to 3 (of 3 products)
Also found on these pages
About Breather Pipes

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.

You may also like
Popular Models