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Porsche > 911 & 912 (1965-1989) > 911 1984-1986 3.2L > Engine Rebuild Parts > Air Intake & Injection >

Hoses / Pipes / Sleeves

Hoses / Pipes / Sleeves

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DISPLAYING 17 to 19 (of 19 products)
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Idle control valve hose. Porsche 911 84-89 - 93011066500/8, 93011066500
2
Idle control valve hose. Porsche 911 84-89
93011066500/8
Product Information
Product Information

Idle Control Valve Hose 

Maintain smooth idle quality and reliable engine performance with this OE Match Idle Control Valve Hose. Manufactured to the original factory specification, this provides the correct fit, flexibility and sealing performance required for the Bosch Motronic engine management system.

Fits:

  • Porsche 911 1984-1986 3.2L
  • Porsche 911 1987-1989 3.2L G50

Diagram ref no 34

This hose connects the idle control valve within the intake system, allowing accurately metered air to bypass the throttle butterfly during idle conditions. A secure, airtight connection is essential for stable engine idle, smooth cold starts and consistent throttle response.

Whether you're replacing ageing rubber hoses during routine servicing or carrying out a complete engine restoration, this OE Match hose helps restore factory performance and reliability.

What Does the Idle Control Valve Hose Do?

The idle control valve hose is a key part of the engine's air intake and idle control system.

Its functions include:

  • Carrying metered air between the idle control valve and the intake system.
  • Allowing the Bosch Motronic ECU to regulate engine idle speed accurately.
  • Maintaining an airtight intake tract to prevent unmetered air entering the engine.
  • Supporting smooth cold starting and warm idle operation.
  • Helping optimise fuel mixture, emissions and overall drivability.

A properly sealed idle control valve hose is essential for maintaining the precise air-fuel balance required for stable engine operation.

Why Does the Idle Control Valve Hose Fail?

Over time, the hose is exposed to high engine bay temperatures, oil vapours and constant engine movement, causing the rubber to deteriorate.

Common causes of failure include:

  • Heat-related hardening and loss of flexibility.
  • Cracks and splits caused by age.
  • Oil contamination weakening the rubber compound.
  • Engine vibration causing fatigue around connection points.
  • Perishing after years of service.
  • Vacuum leaks developing through small surface cracks.

Even minor air leaks can upset the engine management system, resulting in poor idle quality and reduced performance.

When Should It Be Replaced?

Replacement is recommended when:

  • The engine idles roughly or inconsistently.
  • Idle speed hunts or fluctuates.
  • Vacuum leaks are detected within the intake system.
  • The hose becomes cracked, brittle or soft.
  • The idle control valve is being replaced.
  • Carrying out a full intake or engine overhaul.
  • Performing preventative maintenance on older or higher-mileage vehicles.

Replacing ageing idle control hoses helps restore correct idle operation while preventing difficult-to-diagnose vacuum leaks.



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

93011066500
93011066500
93011066500

The product you are viewing cross references to these numbers
Intake vacuum hose. Porsche 911 / 964 / 993 - 99918106841
2
Intake vacuum hose. Porsche 911 / 964 / 993
Special Order item
99918106841
Product Information
Product Information
Intake vacuum hose - Check valve to Venturi tube.

porsche

Fits:
Porsche 911 Carrera 3.2L 1984-89
Porsche 964 C2 / C4 3.6L 1989-94
Porsche 993 C2 / C4 3.6L 1995-98

Click 'Zoom in' for large parts diagram.
Diagram ref no 24

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

99918106841
99918106841

The product you are viewing cross references to these numbers
Rubber sleeve restrictor valve. Porsche 911 3.2 Carrera - 93020724301
3
Rubber sleeve restrictor valve. Porsche 911 3.2 Carrera
Special Order item
93020724301
Product Information
Product Information
Rubber sleeve restrictor valve. 

Fits:
Porsche 911 3.2 Carrera - 1984 to 1989

Diagram ref no 34



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

93020724301
93020724301

The product you are viewing cross references to these numbers
DISPLAYING 17 to 19 (of 19 products)
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About Hoses / Pipes / Sleeves

Air Inlet Hoses, Pipes & Sleeves – Durable Intake Components for Porsche Performance

Air inlet hoses, pipes, and sleeves are essential components of your Porsche’s intake system, connecting the air filter housing, throttle body, turbocharger, and intercooler. They ensure a smooth and sealed flow of air into the engine, supporting efficient combustion, responsive acceleration, and consistent performance.

At Design911, we supply a full range of genuine and high-quality air inlet hoses, pipes, and sleeves for numerous Porsche models that include 911, Boxster, Cayman, Cayenne, Macan, and Panamera models. Each component is engineered for precision fitment, heat resistance, and airflow stability — helping your Porsche deliver the performance and reliability it’s known for.

What Do Air Inlet Hoses, Pipes & Sleeves Do?

These components channel filtered air through the intake system to the engine’s combustion chambers. Their main functions include:

  • Maintaining airtight airflow between intake components.
  • Reducing turbulence and air loss for improved throttle response.
  • Supporting optimal air pressure for turbocharged and naturally aspirated engines.
  • Protecting against contaminants that can reduce performance or cause engine wear.

In turbocharged Porsche models, these parts also help manage boost pressure, making them crucial to both efficiency and power delivery.

Why Do Air Inlet Hoses, Pipes & Sleeves Fail?

Due to their constant exposure to heat, vibration, and engine movement, air inlet components can deteriorate over time. Common causes of failure include:

  • Cracking or splitting from heat cycles and material fatigue.
  • Oil or fuel vapor contamination softening the rubber or plastic.
  • Loose or damaged clamps causing vacuum or boost leaks.
  • Age-related hardening leading to brittle connections.
  • Excessive boost pressure stressing the hose in performance applications.

Symptoms of failure include hissing or whistling noises, loss of boost pressure, poor throttle response, rough idling, or a check engine light caused by airflow irregularities.

Why Replace Worn Air Inlet Components?

A leaking or damaged inlet hose can cause unmetered air to enter the engine, resulting in incorrect fuel-air ratios, poor performance, or even turbocharger strain. Replacing worn or cracked hoses and pipes ensures proper airflow, efficient combustion, and reliable performance.

Benefits of replacement include:

  • Restored air pressure and engine response.
  • Improved turbo efficiency and power delivery.
  • Enhanced fuel economy and reduced emissions.
  • Long-term reliability with manufacturer-quality materials.

All hoses, pipes, and sleeves available at Design911 are crafted from high-temperature silicone, reinforced rubber, or aluminium alloys for superior sealing, flexibility, and strength — ensuring dependable performance under demanding conditions.

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