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Heater hoses & pipes
- 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Related, superseded, cross reference or alternative numbers for comparison.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
- 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 Heater Hoses & Pipes | Reliable Coolant Flow & Cabin Heating Efficiency
Heater hoses and pipes are essential components in your Porsche’s heating and cooling system. They carry heated coolant from the engine to the heater core, enabling warm air circulation throughout the cabin. Without properly functioning hoses and pipes, the heating system cannot deliver consistent temperature control or maintain efficient engine cooling.
At Design911, we supply premium heater hoses and coolant pipes that meet or exceed original engineering standards. Constructed from high-quality rubber, aluminium, or reinforced composite materials, these components ensure leak-free performance, excellent heat resistance, and long-term durability.
Whether you’re restoring a classic 911 or maintaining a modern Porsche with advanced climate control systems, our heater hoses and pipes provide the precision, fitment, and performance required for dependable heating and cooling.
What Do Heater Hoses & Pipes Do?
Heater hoses and pipes form the circulation path that carries hot coolant from the engine to the heater core, allowing the HVAC system to provide warm air inside the cabin.
Core Functions:
- Transfer heated coolant to the heater core for cabin warming.
- Maintain proper coolant flow between engine and heating system.
- Regulate temperature and prevent air pockets in the system.
- Ensure efficient heat exchange for passenger comfort.
- Protect against coolant loss and overheating.
A properly functioning set of hoses and pipes is critical for both engine cooling performance and interior heating efficiency.
Why Do Heater Hoses & Pipes Fail or Degrade?
These components endure constant heat, pressure, and vibration. Over time, material fatigue and corrosion can lead to leaks or blockages.
Common Causes of Failure Include:
- Age-related cracking, swelling, or brittleness of rubber hoses.
- Corrosion or pinhole leaks in metal pipes.
- Coolant contamination or chemical degradation.
- Loose or damaged hose clamps causing leaks.
- Blockages from scale or debris restricting coolant flow.
When heater hoses or pipes fail, symptoms include coolant leaks, weak cabin heat, overheating, or a sweet smell of antifreeze inside the cabin.
Why Replace Your Porsche Heater Hoses & Pipes?
Replacing worn or damaged heater hoses and pipes restores proper coolant circulation, prevents leaks, and ensures stable heating and engine temperature control.
Key Benefits:
- Restores efficient coolant flow and cabin heating performance.
- Prevents leaks, overheating, and engine damage.
- Improves reliability and system pressure integrity.
- Resistant to heat, pressure, and corrosion for long lifespan.
- Direct-fit replacements for Porsche 911, Cayman, Boxster, Panamera, Macan, and Cayenne models.
- Ideal for maintenance, restorations, or performance upgrades.
It’s recommended to replace heater hoses and clamps during coolant service intervals to maintain maximum system reliability.
Highlights
- Precision-engineered Porsche heater hoses and coolant pipes.
- Constructed from high-quality, heat-resistant materials.
- Direct-fit replacements for Porsche models old and new.
- Designed for long-term resistance to pressure and corrosion.
- Ensures reliable heating and engine cooling performance.
- Ideal for restoration, servicing, and preventative maintenance.
