flexible hose Genuine Porsche part 91121155300

Blower Hose in engine bay, appox 1 meter long, 60mm diameter.
An OE Match blower hose made from black outer material with an aluminium inner structure, designed to channel heated air within the engine bay heating system of Porsche 911 models.  

Fits:
Porsche 911 1975 - 1983
Also used on Pre >>1973 911's in the heater system

Diagram ref no 13

This OE Match Blower Hose is a high-quality replacement component designed to replicate the original Porsche heater hose used in classic air-cooled 911 models. Installed in the engine bay, this hose connects the blower motor to the heat exchanger, enabling the transfer of warm air into the vehicle’s heating system.

This hose, approximately 60 mm in diameter and approximately 1 meter long, is designed for proper routing and fit within the limited space of the engine compartment. It plays a crucial role in maintaining proper cabin heating performance, especially in colder driving conditions.

This blower hose channels heated air from the engine-mounted blower to the heat exchangers, ensuring warm air is properly distributed through the vehicle’s heating system.

Function
•  Transfers heated air from blower to heat exchanger
•  Maintains consistent airflow within the heating system
•  Withstands high engine bay temperatures
•  Flexible design allows correct routing and installation
•  Supports effective cabin heating performance

Over time, blower hoses can become brittle, cracked, or collapsed due to prolonged exposure to heat and age. This can lead to reduced airflow, poor heating performance, and potential heat loss within the system. Replacing a worn hose ensures efficient heat transfer, improves cabin comfort, and maintains proper operation of the vehicle’s heating system.

When to replace
•  Visible cracks, splits, or deterioration
•  Reduced or inconsistent cabin heating
•  Hose becoming brittle or collapsing under heat
•  During engine bay or heating system restoration
•  Signs of air leaks or disconnected ducting

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91121152201

The product you are viewing cross references to these numbers

Heater Hose Pipe from Heat Exchanger.


Fits:
Porsche 911/911S/Carrera 3.0 1975-77
Porsche 911 SC 1978-83

Click 'zoom in' for large parts diagram.
Diagram ref no 22

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91121155300

The product you are viewing cross references to these numbers

Blower hose in engine bay, Brown paper / aluminium
Appox 1.1meter long 60mm diameter.

This blower hose is a replacement heater / blower air hose for Porsche 911 models from 1975 to 1983. Manufactured in a brown paper and aluminium style, it is designed to replace the original-style flexible ducting used within the heating and ventilation system.

Fits:
Porsche 911 1975 - 1983
 * Also used on Pre >>1973 911's in the heater system

Diagram ref no 13

The blower hose carries air through the heater and ventilation system, helping direct airflow from the engine bay heater blower system through the correct ducting route. A good blower hose supports cabin heating, ventilation, and demisting performance by maintaining proper airflow without leaks or restrictions.

Functions
• Replaces the heater blower hose
•  Carries warm air through the heating and ventilation system
•  Helps support cabin heating and windscreen demisting
•  Maintains correct airflow through the heater ducting
•  Replaces split, crushed, torn, brittle, missing, or heat-damaged hoses
•  Brown paper / aluminium style for classic Porsche appearance
•  Suitable for heater system repair, refurbishment, or restoration.

Why Replace This Part?
Blower hoses are exposed to heat, age, vibration, moisture, and engine bay conditions. Over time, the hose can become brittle, split, collapse, fray, or detach from its mounting points. A damaged hose can reduce heater output, cause poor demisting, allow air leaks, or leave the heater system incomplete. Replacing the blower hose helps restore correct airflow and reliable heating system performance.

When to Replace This Part
•  The blower hose is split, crushed, torn, brittle, or missing
•  Cabin heating output is weak or inconsistent
•  Windscreen demisting performance is poor
•  Air leaks are present around the heater ducting
•  The heater blower system is being serviced
•  Engine bay heater hoses are being replaced
•  The vehicle is undergoing Porsche 911 heating system restoration.

Where it fits on the car
This blower hose fits within the heater blower and ventilation ducting system on Porsche 911 models. It connects according to the factory heating system layout and supports airflow through the heater circuit.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91121152201

The product you are viewing cross references to these numbers

Hot air hose - Engine compartment blower to heat exchanger. 60 X 1110 mm.



Fits:
Porsche 911 1975-83
Also used on Pre >>1973 911's in the heater system

Click 'Zoom in' for large parts diagram.
Diagram ref no 13

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91121152201

The product you are viewing cross references to these numbers