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Porsche // Taycan (9J1) MK1 2020-2024 // 9J1.1 Taycan GTS 2020-24
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- Porsche 944 2.5L 8V 1982-87
Hose.
The Genuine Porsche Air / Vacuum Hose (Part Number: 94411017802) is an original equipment engine intake system component designed for early Porsche 944 2.5L models equipped with factory air conditioning.
Fits:
Diagram Ref No 29
This hose forms part of the engine's auxiliary air and vacuum system, working in conjunction with the electrically operated auxiliary air valve and associated intake components to maintain the intended air passages within the engine management system.
Manufactured to Porsche's original fitment specifications, the hose is designed to provide a secure, correctly routed connection between the relevant intake and auxiliary air components. Its moulded shape helps ensure correct positioning within the engine compartment while maintaining a properly sealed air passage.
The Porsche 944's 2.5L four-cylinder engine depends on correctly managed intake airflow to maintain stable idling, smooth engine operation and reliable performance. A damaged or leaking hose may allow unmetered air to enter the intake system, potentially affecting the air-fuel mixture and idle quality.
Over time, original rubber hoses can deteriorate as a result of engine heat, age, vibration and repeated thermal cycling. Rubber may become hard, brittle or cracked, particularly around connection points and hose bends.
A split or poorly sealed hose may cause an intake air leak, leading to rough idling, fluctuating engine speed or reduced drivability.
Replacing a deteriorated hose with a Genuine Porsche replacement helps restore the original intake system sealing arrangement, maintain correct auxiliary air operation and preserve the reliability of the engine's air management system.
Ideal for intake leak repairs, idle quality investigations, routine engine maintenance and classic Porsche restoration projects, this hose provides a factory-specified replacement for compatible early Porsche 944 models.
What This Product Does:
The Porsche 944 Air / Vacuum Hose is part of the engine's auxiliary air and intake system.
Its primary function is to provide a sealed air passage between the relevant intake components, supporting the operation of the electrically controlled auxiliary air valve.
The auxiliary air system helps manage additional airflow under certain operating conditions. The hose must remain correctly connected and airtight to ensure the system functions as intended.
If the hose becomes cracked, loose or disconnected, unwanted air may enter the intake system and interfere with the engine's normal fuel and air management.
Its main functions include:
- Providing an auxiliary air passage: Connects the relevant components within the engine's auxiliary air system.
- Maintaining intake system sealing: Helps prevent unwanted air from entering through damaged or poorly sealed connections.
- Supporting stable engine idling: Helps maintain the airflow conditions needed for consistent idle operation.
- Supporting auxiliary air valve operation: Provides the appropriate hose connection for the electrically controlled auxiliary air arrangement.
- Maintaining correct air-fuel management: Helps prevent air leaks that could disturb the intended engine mixture.
- Supporting smooth engine performance: Reduces the likelihood of running problems associated with an air leak.
- Providing correct component routing: Uses the original hose shape to maintain the intended installation arrangement.
- Preserving factory functionality: Maintains the original Porsche intake system configuration.
Symptoms Of Wear Or Failure:
The original Porsche 944 air and vacuum hoses are exposed to engine heat, vibration, oil vapour and age-related deterioration.
On older vehicles, rubber components may lose flexibility, crack or become loose around their connections.
Common symptoms of a worn or damaged hose include:
- Rough engine idling: An intake air leak may disturb the air-fuel mixture, causing uneven engine operation.
- Fluctuating idle speed: The engine speed may rise and fall unexpectedly when the hose no longer seals correctly.
- High idle speed: Unmetered air entering the intake system may contribute to an abnormally high idle.
- Engine stalling: Severe air leaks may affect idle stability, particularly at low engine speeds.
- Hissing noises: A split or disconnected hose may produce an audible air leak around the intake system.
- Hard or brittle rubber: Ageing can cause the hose to lose flexibility and become more susceptible to cracking.
- Visible splits or cracks: Damage may appear around bends, hose ends or clamping areas.
- Loose hose connections: Deteriorated hose ends may no longer grip their fittings securely.
- Poor engine response: Intake air leaks may contribute to hesitation or inconsistent engine operation.
- Increased fuel consumption: Incorrect air-fuel management caused by significant air leaks may affect fuel efficiency.
- Cold-running irregularities: A fault in the auxiliary air circuit may contribute to unstable operation during warm-up.
- Damaged or collapsed hose sections: Physical deterioration may restrict the intended passage or prevent proper sealing.
Why Replacement Matters:
Replacing an ageing or damaged air hose is important for maintaining the integrity of the Porsche 944's intake system and supporting reliable engine performance.
Even small cracks or poorly sealed connections can allow unwanted air to enter the intake system, particularly when the engine is idling.
A damaged hose may also become increasingly brittle over time, making it more likely to split during engine servicing or normal operation.
Installing a Genuine Porsche replacement Air / Vacuum Hose helps to:
- Restore correct intake sealing: Replace damaged hose material and reduce unwanted air leakage.
- Improve idle stability: Help restore consistent engine idling where a leaking hose is contributing to irregular running.
- Maintain correct auxiliary air operation: Ensure the relevant air circuit is connected and sealed as intended.
- Reduce unmetered air entry: Help preserve the correct relationship between intake airflow and fuel delivery.
- Address hissing noises: Eliminate air leak sounds caused by a confirmed damaged hose.
- Improve engine drivability: Help restore smoother low-speed operation where an intake leak is responsible.
- Prevent further deterioration: Replace hardened, cracked or brittle rubber before complete failure.
- Maintain correct hose routing: Restore the original fitment and connection arrangement.
- Support engine servicing: Provide replacement pipework during auxiliary air valve or intake maintenance.
- Preserve vehicle originality: Maintain the factory intake system configuration on early Porsche 944 models.
- Support classic Porsche restoration: Replace deteriorated rubber components during comprehensive engine refurbishment.
- Maintain Genuine Porsche specifications: Use the original replacement reference intended for the applicable vehicle.
Replacement is particularly recommended when the original hose shows visible cracking, hardening, loose connections or confirmed air leakage.
When carrying out intake system maintenance, inspecting neighbouring hoses and rubber connections is advisable because these components often experience similar age-related deterioration.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94411017802
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