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- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
Heater Hose to Heater Air Flap - 320mm long
Fits left or right hnd side
Restore the efficiency of your Porsche's heating and
ventilation system with this OE Match Heater Hose,
designed specifically to connect the heater ducting to the heater air flap
on the Porsche 964 Carrera 2 and Carrera 4. Manufactured to original
equipment specifications, this high-quality replacement hose ensures warm air
is directed efficiently through the heating system, maintaining reliable cabin
comfort and proper airflow.
Fits:
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
Diagram ref no 5
Whether you're restoring a classic 964, replacing deteriorated heater ducting or refurbishing the complete heating system, this OE Match heater hose provides factory-quality fitment and dependable long-term durability.
What Does the Heater Hose Do?
The heater hose connects the engine's heating ductwork to the heater air flap assembly, allowing heated air generated by the engine cooling fan and heat exchangers to be directed into the cabin when required.
Its primary functions include:
- Carrying heated air to the heater air flap.
- Maintaining efficient airflow through the heating system.
- Supporting rapid cabin heating.
- Helping deliver effective windscreen demisting and defrosting.
- Preventing warm air from escaping before reaching the heater controls.
- Maintaining the correct operation of the Porsche heating and ventilation system.
A correctly sealed heater hose helps maximise heating efficiency and passenger comfort.
Why Do Heater Hoses Fail?
Heater hoses operate in a high-temperature environment and
gradually deteriorate through age and continual heat exposure. Common causes of
failure include:
- Heat cycling causing the material to harden.
- Age-related cracking and splitting.
- Perishing caused by engine bay temperatures.
- Oil contamination degrading the hose material.
- Abrasion against surrounding components.
- General deterioration after years of service.
As the hose deteriorates it can develop splits, become brittle or collapse, allowing valuable heated air to escape before reaching the cabin.
When Should the Heater Hose Be Replaced?
The heater hose should be inspected whenever the heating
system or engine is serviced. Replacement is recommended if you notice:
- Cracked or brittle hose material.
- Torn or split ducting.
- Loose hose connections.
- Reduced cabin heating performance.
- Poor windscreen demisting.
- Visible heat damage or distortion.
Many Porsche specialists recommend replacing ageing heater hoses during engine-out servicing or whenever the heating ductwork is being refurbished.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96457278500
The product you are viewing cross references to these numbers
- Porsche 356 1950-55
- Porsche 356A 1955-59
This OE Match heater box vent hose is a replacement flexible heater air hose for Porsche 356 and 356A models. Measuring 50 x 270 mm, it is designed to match the original-style fitment and function within the classic Porsche heating and ventilation system.
Sold each - 2 required per car
Fits:
Porsche 356 1950 - 1955
Porsche 356A 1555 - 1959
Not for Carrera
Diagram ref no 1
The heater box vent hose carries warm air from the heater box into the ventilation ducting system. A correctly fitted hose helps maintain proper airflow, cabin heating, and windscreen demisting performance.
Functions
• Replaces the heater box vent hose
• Carries warm air through the heater and ventilation system
• Supports cabin heating and demisting performance
• Helps maintain correct heater airflow
• Replaces split, crushed, brittle, missing, or heat-damaged hoses
• Suitable for heating system repair or restoration
• OE Match replacement for Porsche 356 heater system refurbishment.
Why Replace This Part?
Heater vent hoses can become brittle, split, collapse, fray, or detach due to age, heat, moisture, vibration, and general wear. A damaged hose can reduce warm air flow, cause poor demisting, allow air leaks, or leave the heater system incomplete. Replacing the hose helps restore correct heater operation and original-style presentation.
When to Replace This Part
• The heater hose is split, crushed, brittle, torn, or missing
• Cabin heating output is weak or uneven
• Windscreen demisting performance is poor
• Air leaks are present around the heater box or ducting
• The heater boxes or ventilation ducting are being serviced
• Engine bay or underside heater components are being restored
• The vehicle is undergoing Porsche 356 or 356A restoration.
Where it fits on the car
This hose fits within the heater box vent and warm air ducting system on Porsche 356 and 356A models. It connects according to the factory heater layout and supports airflow from the heater box into the ventilation system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
64421192105
The product you are viewing cross references to these numbers
- Porsche 356 1950-55
- Porsche 356A 1955-59
Fits:
Porsche 356 - 1950 to 1955
Porsche 356A - 1555 to 1959
Not for Carrera
Heater box vent hose 50x130mm.
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
64421192100
The product you are viewing cross references to these numbers