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Porsche // 911 & 912 (1965-1989) // 911 1984-1986 3.2L
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- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
The Genuine Porsche Engine Air Intake Hose 99611022107 is a replacement air intake duct for compatible Porsche vehicles. It forms part of the engine's induction system, providing a sealed route for intake air between the relevant air-filter/intake components and the engine.
Fits:
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999
- Porsche Boxster S 986 3.2L 1999
073 - Version For Russia
249 - Tiptronic Transmission
481 - 5th Speed Manual Transmission
Diagram Ref No 8
A correctly sealed intake hose is important for consistent airflow, engine performance and reliable engine-management operation. Over time, the original hose can harden, split, crack or develop leaks due to engine heat, vibration, age and repeated thermal cycling.
Replacing a damaged or leaking hose helps restore a properly sealed intake tract and prevents unwanted air or contamination from entering the induction system.
What This Product Does:
The engine air intake hose carries intake air through the engine's induction system.
Its primary functions include:
- Providing a controlled path for intake air
- Maintaining a sealed connection between intake components
- Helping prevent unwanted air leaks
- Supporting consistent engine airflow
- Protecting the intake system from dirt and contamination
- Supporting correct engine-management operation
- Helping maintain smooth engine performance
The hose must remain securely connected and free from cracks or splits to perform correctly.
Symptoms Of Wear Or Failure:
Common signs of a damaged or deteriorated engine air intake hose can include:
- Visible cracks or splits
- Hardened or brittle material
- Loose connections
- Damaged hose ends
- Collapsed or distorted sections
- Hissing or sucking noises
- Rough or unstable idle
- Hesitation during acceleration
- Reduced engine performance
- Poor throttle response
- Engine-management warning light
- Air/fuel mixture fault codes
- Increased fuel consumption
- Dirt or contamination around damaged areas
The exact symptoms depend on the location and severity of the leak.
Why Replacement Matters:
Replacing a cracked, split or deteriorated engine air intake hose helps restore the integrity of the induction system.
A sound replacement hose can help:
- Restore a properly sealed intake path
- Prevent unwanted air leaks
- Maintain consistent airflow
- Improve idle and drivability where a leak was present
- Support correct engine-management operation
- Prevent dirt and contamination entering through damaged areas
- Reduce intake-related fault codes
- Maintain reliable engine performance
Ignoring a damaged hose can allow a relatively straightforward intake leak to develop into persistent drivability and diagnostic problems.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99611022107
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Fits:
Porsche 911 Carrera 3.2L 1984-85
Click 'Zoom in' for large parts diagram.
Diagram ref no 24
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011032803
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Fits:
Porsche 911 Carrera 3.2L 1984-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 28
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93020723601
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Idle Control Valve Hose
Maintain smooth engine performance and stable idle speed
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 38
The idle control valve hose is a vital component of the engine's intake system, providing a sealed air passage between the idle control valve and the intake system. A damaged or leaking hose can introduce unmetered air, leading to poor idle quality, reduced drivability and engine management issues.
Ideal for routine maintenance, engine restoration or resolving vacuum leaks, this OE Match hose restores factory-style performance and reliability.
What Does the Idle Control Valve Hose Do?
The idle control valve hose forms part of the engine's idle air circuit.
Its primary functions include:
Carrying metered intake air to and from the idle control valve. Allowing the engine management system to regulate idle speed accurately. Maintaining a sealed intake system to prevent vacuum leaks. Supporting smooth cold starts and stable idle operation. Helping optimise fuel mixture and engine efficiency.A correctly sealed idle control valve hose is essential for consistent idle performance and proper operation of the Bosch Motronic fuel injection system.
Why Does the Idle Control Valve Hose Fail?
Located within the engine compartment, the hose is continuously exposed to heat, oil vapour and engine vibration.
Common causes of deterioration include:
Rubber hardening through repeated heat cycles. Cracks developing with age. Splits caused by engine movement and vibration. Oil contamination softening or degrading the rubber. Loss of flexibility leading to poor sealing. Perishing after decades of service.Even small cracks can create vacuum leaks that affect engine performance and idle quality.
When Should It Be Replaced?
Replacement is recommended when:
The engine idles unevenly or stalls. Idle speed fluctuates or hunts. Vacuum leaks are detected. The hose shows signs of cracking, splitting or hardening. Carrying out an intake system overhaul. Replacing the idle control valve or other intake hoses. Performing preventative maintenance on higher-mileage vehicles.Replacing ageing intake hoses is an effective way to restore smooth idle performance and eliminate hard-to-diagnose vacuum leaks
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011058902
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
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:
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
The product you are viewing cross references to these numbers