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Porsche > Cayenne 9PA (955) 2003-2006 > 955 Cayenne 3.2L V6 2003-06 > Engine Rebuild Parts > Air Intake & Injection >

Valves

Valves

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DISPLAYING 1 to 2 (of 2 products)
Bleeder Valve, Intake Manifold. Porsche 955 Cayenne 3.2L V6 2004-06 - 95560551701, 95560551700
2
Bleeder Valve, Intake Manifold. Porsche 955 Cayenne 3.2L V6 2004-06
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95560551701
Product Information
Product Information
Bleeder Valve, Intake Manifold.

The Bleeder Valve, Intake Manifold is an important emissions and crankcase ventilation system component designed to regulate vacuum pressure within the intake manifold and associated engine breathing systems. Often referred to as a pressure regulating valve or breather valve, it helps control airflow between the intake system and crankcase ventilation circuits, ensuring stable engine operation and efficient combustion.

Fits:

  • Porsche 955 Cayenne 3.2L V6 2004-06


Diagram Ref No 20

Manufactured to OEM specifications, the bleeder valve is engineered to maintain correct vacuum levels, support proper crankcase ventilation, and optimise engine performance. It plays a vital role in reducing emissions, preventing excessive pressure build-up, and ensuring smooth engine operation under varying load conditions.

What This Product Does:

  • Regulates vacuum pressure within the intake manifold system
  • Supports proper crankcase ventilation operation
  • Controls airflow between engine ventilation circuits and the intake system
  • Helps maintain stable idle and engine performance
  • Reduces harmful emissions by managing crankcase gases
  • Supports efficient combustion and engine management system operation

Symptoms Of Wear Or Failure:
  • Rough or unstable idle
  • Check engine light illumination
  • Vacuum leaks and hissing noises from the engine bay
  • Increased oil consumption
  • Poor engine performance or hesitation
  • Engine misfires Excessive crankcase pressure
  • Fault codes relating to air leaks, fuel trim, or crankcase ventilation systems

Why Replacement Matters:
  • Restores proper intake manifold vacuum regulation
  • Ensures efficient crankcase ventilation system operation
  • Improves idle quality and engine smoothness
  • Helps reduce emissions and maintain fuel efficiency
  • Prevents excessive crankcase pressure build-up
  • Reduces the likelihood of vacuum leaks and engine management faults
  • Protects seals and gaskets from pressure-related damage
  • Maintains reliable engine performance and long-term engine health



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

95560551701
95560551701
95560551700

The product you are viewing cross references to these numbers
Bleeder Valve, Intake Manifold. Porsche 955 Cayenne 3.2L V6 2004-06 - 95560551701, 95560551700 - 0280142353
2
Bleeder Valve, Intake Manifold. Porsche 955 Cayenne 3.2L V6 2004-06
95560551701/1
Product Information
Product Information
Bleeder Valve, Intake Manifold.

The BOSCH Bleeder Valve, Intake Manifold is an important emissions and crankcase ventilation system component designed to regulate vacuum pressure within the intake manifold and associated engine breathing systems. Often referred to as a pressure regulating valve or breather valve, it helps control airflow between the intake system and crankcase ventilation circuits, ensuring stable engine operation and efficient combustion.

Fits:

  • Porsche 955 Cayenne 3.2L V6 2004-06


Diagram Ref No 20

The BOSCH bleeder valve is engineered to maintain correct vacuum levels, support proper crankcase ventilation, and optimise engine performance. It plays a vital role in reducing emissions, preventing excessive pressure build-up, and ensuring smooth engine operation under varying load conditions.

What This Product Does:

  • Regulates vacuum pressure within the intake manifold system
  • Supports proper crankcase ventilation operation
  • Controls airflow between engine ventilation circuits and the intake system
  • Helps maintain stable idle and engine performance
  • Reduces harmful emissions by managing crankcase gases
  • Supports efficient combustion and engine management system operation

Symptoms Of Wear Or Failure:
  • Rough or unstable idle
  • Check engine light illumination
  • Vacuum leaks and hissing noises from the engine bay
  • Increased oil consumption
  • Poor engine performance or hesitation
  • Engine misfires Excessive crankcase pressure
  • Fault codes relating to air leaks, fuel trim, or crankcase ventilation systems

Why Replacement Matters:
  • Restores proper intake manifold vacuum regulation
  • Ensures efficient crankcase ventilation system operation
  • Improves idle quality and engine smoothness
  • Helps reduce emissions and maintain fuel efficiency
  • Prevents excessive crankcase pressure build-up
  • Reduces the likelihood of vacuum leaks and engine management faults
  • Protects seals and gaskets from pressure-related damage
  • Maintains reliable engine performance and long-term engine health



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

95560551701
95560551701
95560551700

The product you are viewing cross references to these numbers
DISPLAYING 1 to 2 (of 2 products)
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About Valves

Air Injection Valves – Reliable Emissions Control for Porsche Engines

Air injection valves, also known as secondary air valves or combi valves, are vital components in your Porsche’s emissions system. They control the flow of fresh air from the secondary air pump into the exhaust manifold during cold starts. By allowing oxygen into the exhaust stream, air injection valves help unburned fuel ignite more completely — reducing emissions and ensuring your Porsche meets environmental standards without compromising performance.

At Design911, we offer a wide range of genuine and manufacturer-quality air injection valves for Porsche 911, Boxster, Cayman, Cayenne, Macan, and Panamera models. Each valve is precision-engineered to deliver reliable operation, corrosion resistance, and consistent airflow — ensuring your Porsche runs cleanly and efficiently.

What Do Air Injection Valves Do?

Air injection valves play a key role in the secondary air injection system, which supports clean combustion during engine startup. Their main functions include:

  • Controlling air flow from the secondary air pump into the exhaust manifold.
  • Promoting oxidation of unburned hydrocarbons to reduce emissions.
  • Helping catalytic converters reach operating temperature faster.
  • Improving cold-start performance and fuel efficiency.

This system reduces exhaust emissions while maintaining Porsche’s high-performance standards.

Why Do Air Injection Valves Fail?

Air injection valves operate in harsh environments, exposed to heat, moisture, and exhaust gases. Over time, these conditions can cause the valves to wear or fail. Common causes include:

  • Carbon buildup blocking airflow and preventing valve movement.
  • Corrosion caused by condensation and exhaust moisture.
  • Sticking or seized valves from soot accumulation.
  • Vacuum leaks or diaphragm damage affecting valve operation.
  • Electrical or control issues in modern electronically regulated systems.

Typical symptoms of a failing air injection valve include check engine light, failed emissions tests, rough cold starts, or audible clicking or hissing noises near the valve.

Why Replace a Faulty Air Injection Valve?

A malfunctioning valve can cause increased emissions, poor cold-start performance, or catalytic converter damage if left unchecked. Replacing worn or stuck valves ensures proper airflow, optimal emissions control, and smooth engine operation.

Benefits of replacement include:

  • Improved cold-start reliability and smoother idle.
  • Reduced emissions and regulatory compliance.
  • Prevents damage to the catalytic converter and air pump.
  • Long-term reliability with manufacturer-quality construction.

All air injection valves from Design911 feature corrosion-resistant housings, heat-tolerant diaphragms, and precision sealing surfaces — ensuring dependable performance and extended service life for your Porsche.

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