Heater hose to air flap. Porsche 964 C2/C4  ❭  96457278500

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

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.