Heater hoses & pipes

Clamp For Heater Hose - 330 mm.
The OE Match Clamp for Heater Hose, 330 mm is a high-quality replacement fastening component designed to securely retain heater hoses within the vehicle's cooling and heating system. Manufactured to OE specifications for fit, strength and durability, this clamp provides the clamping force required to maintain a reliable, leak-free connection between heater hoses and associated cooling system components.  

Fits:

• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)  

Diagram Ref No 12

Constructed from corrosion-resistant materials and engineered to withstand constant exposure to heat, coolant, vibration and pressure fluctuations, this hose clamp helps ensure the integrity of the cooling and heating circuits. Proper hose retention is essential for maintaining coolant flow, heating performance and overall engine cooling system reliability.  

What This Product Does:

• Secures heater hoses to pipes, fittings and cooling system components.
• Maintains a leak-free coolant system connection.
• Provides consistent clamping force under varying temperatures.
• Prevents hose movement caused by vibration and pressure changes.
• Supports efficient coolant circulation through the heating system.
• Helps maintain correct cabin heating performance.
• Contributes to overall cooling system reliability and safety.

Symptoms Of Wear Or Failure:

• Coolant leaks around heater hose connections.
• Visible corrosion or rust on the clamp.
• Loose or slipping heater hoses.
• Coolant residue around hose fittings.
• Reduced heater performance due to coolant loss.
• Sweet coolant odour from the engine bay.
• Low coolant level warnings.
• Overheating concerns caused by coolant leakage.
• Visible clamp deformation or loss of tension.

Why Replacement Matters:

• Heater hose clamps are exposed to continual heat cycles, moisture, coolant chemicals and engine vibration. Over time, corrosion, metal fatigue or loss of clamping tension can reduce their ability to maintain a secure seal between hoses and cooling system components.
• A failing hose clamp can allow coolant to escape, leading to reduced heater efficiency, cooling system pressure loss and potential engine overheating. Even minor coolant leaks can worsen over time, increasing the risk of damage to cooling system components and resulting in costly repairs.
• Replacing a worn or damaged heater hose clamp restores proper hose retention, prevents coolant leaks and helps maintain the efficiency and reliability of the cooling and heating systems. An OE Match replacement provides factory-style fitment, dependable clamping performance and long-term durability, ensuring reliable operation of your Porsche cooling system.

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

99951234901

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Clamp for heater hose top & holder for heater cable. Made out of Titanium



Fits:
Porsche 911 1965-86
Porsche 911 Turbo 3.0L / 3.3L 1975-86

Click 'Zoom in' for large parts diagram.
Diagram ref no 2

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90121105

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Clamp for heater hose top & holder for heater cable.
Left or right side



Fits:
Porsche 911 1965-86
Porsche 911 Turbo 3.0L / 3.3L 1975-86

Click 'Zoom in' for large parts diagram.
Diagram ref no 2

Related reference numbers
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90121105

The product you are viewing cross references to these numbers

Clamp for heater hose top & holder for heater cable.



Fits:
Porsche 911 1965-86
Porsche 911 Turbo 3.0L / 3.3L 1975-86

Click 'Zoom in' for large parts diagram.
Diagram ref no 2

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

90121105

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Clamp – Power Steering & AC Hose Clamp 
Sold each

High-quality clamp designed for securing power steering and air conditioning hoses on Porsche 911 and 928 models.

This clamp ensures hoses are firmly held in place, maintaining correct routing and preventing movement, vibration, or potential damage within the engine bay. It plays an important role in supporting both power steering system reliability and air conditioning performance.

Fits:

• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1987-1989 3.3L Turbo (930)
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95

Diagram ref no 32

Manufactured to OEM specifications, this clamp offers precise fitment, durability, and corrosion resistance. Supplied individually, it is ideal for maintenance, repair, or restoration of Porsche hose systems.

Key Features

• Suitable for Porsche 911 and Porsche 928
• Part number N020601A
• Designed for power steering and AC hose applications
• Ensures secure hose mounting and routing
• Prevents vibration-related wear and damage
• Durable and corrosion-resistant construction
• OEM-style fit and performance
• Sold individually

Function and Purpose

This clamp is a critical hose securing component.

It helps to:
• Secure power steering hoses in position
• Maintain correct routing of AC lines
• Prevent hose movement and vibration
• Protect hoses from wear and damage
• Ensure reliable system operation

Why Replace Clamps

Clamps can degrade over time due to heat and environmental exposure.

Common issues include:
• Loss of clamping strength
• Corrosion or fatigue
• Hose movement or misalignment
• Increased risk of leaks or system failure

Replacing worn clamps ensures secure installation and protects critical systems.

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

N020601A

The product you are viewing cross references to these numbers

Clamp power steering hose and AC hose by Design911 for selected Porsche 911 and 928 models. This part helps keep hose runs correctly supported and positioned within the engine bay, matching original mounting points and clearances where applicable.

What This Product Does

This clamp secures power steering and air conditioning hoses to help maintain correct routing, limit unwanted movement and reduce chafing against nearby components. For Porsche applications, it is used as a direct-fit replacement engineered to match original dimensions and tolerances.

Functions

• Secures power steering hose runs
• Supports AC hose routing
• Helps reduce hose movement
• Helps limit vibration-related wear
• Maintains correct positioning in the engine bay

Why Replacement Matters

• Old clamps can lose tension through age, heat and general exposure
• Corrosion or fatigue may affect how firmly the hose is retained
• Poor hose support can allow movement, rubbing or misalignment
• Replacing worn hardware helps support correct fit and function

Fits

• Porsche 911 and 912 1965–1989
• Porsche 911 3.2L G50 1987–1989
• Porsche 911 3.3L Turbo 930 1978–1989
• Porsche 928 1978–1995
• Porsche 928S4 5.0L 1987–1992
• Porsche 928GT 5.0L 1989–1991
• Porsche 928GTS 5.4L 1992–1995

Check fitment for your specific Porsche model, year and engine before ordering.

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N020601A

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Climate control hose sealing ring.
Rubber sealing ring / gasket used in the HVAC/heater/ventilation system of classic 911 / 912 cars. Its sealing points where heater/vent hoses pass through body or bulkhead. Ideal when refurbishing HVAC ducts, replacing heater hoses, restoring classic 911/912 ventilation and heat systems.
Sold each. 2 required per vehicle.

Fits:
Porsche 911 1965 - 1989 all models

Diagram ref no 18

Because over decades the original sealing rings often become brittle, hard, compressed or cracked (due to heat cycles, age, vibration, exposure to cabin air, moisture and dust), they lose their ability to seal properly.

This can lead to:
• Unwanted air leaks or drafts into cabin
• Water or dust ingress into the interior or into heater ducts
• Poor heating or ventilation performance
• Increased cabin noise, wind-noise or fumes entering cabin (especially on vehicles with engine-bay to cabin vents).

Replacing with a correct-spec sealing ring ensures a tight, flexible seal that restores proper HVAC function, occupant comfort, and helps preserve the integrity of the car’s interior and ventilation system.

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

90157291301

The product you are viewing cross references to these numbers

Climate control hose sealing ring.

Fits:
Porsche 911 1965-89 all models

Diagram ref no 34

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90157291301

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Vacuum Hose Distribution Y-Piece – 4mm Vacuum Line Splitter 
Sold each - used in various locations

High-quality vacuum hose distribution Y-piece designed for a wide range of Porsche models including 911, 964, 924S, 944, 968, and 928.

This Y-splitter allows a single vacuum source to be divided into two outlets, enabling efficient routing and connection of vacuum lines within the engine bay or HVAC system. It is specifically designed for vacuum hoses with a 4mm outer diameter, ensuring a secure and precise fit.

Fits:

• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988
• Porsche 968 3.0L 1992-94
• Porsche 968 Sport 3.0L 1994-95
• Porsche 968 CS 3.0L 1993-95
• Porsche 968 Turbo S 3.0L 1993-94
• Porsche 928S2 4.7L 1984-86

Diagram ref no 4

Manufactured to OEM standards, this connector is ideal for maintaining or restoring vacuum system integrity across multiple Porsche applications.

Key Features

• Universal-style vacuum Y-piece connector
• Suitable for Porsche 911, 964, 924S, 944, 968, and 928
• Designed for 4mm outer diameter vacuum hoses
• Enables splitting of vacuum lines
• OEM-style fit and function
• Durable construction for long-term reliability

Function and Purpose

This Y-piece is a critical connector within the vacuum system.

It helps to:

• Split a single vacuum line into two outputs
• Maintain proper vacuum routing
• Ensure consistent vacuum pressure distribution
• Support engine and HVAC system operation

Why Replace Your Vacuum Connector

Over time, vacuum connectors can degrade due to heat and age.

Common issues include:

• Cracked or brittle plastic
• Vacuum leaks
• Poor hose connections
• Engine or HVAC system malfunctions

Replacing the Y-piece restores proper vacuum system function.

• Loose or unsecured temperature sensor
• Incorrect temperature readings
• HVAC system inconsistencies
• Broken or missing connector clips

Replacing the lock piece restores proper sensor stability and function.

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

92857372702

The product you are viewing cross references to these numbers

Vacuum Hose Distribution Y-Piece – 4mm Vacuum Line Splitter 
Sold each - used in various locations

High-quality vacuum hose distribution Y-piece designed for a wide range of Porsche models including 911, 964, 924S, 944, 968, and 928.

This Y-splitter allows a single vacuum source to be divided into two outlets, enabling efficient routing and connection of vacuum lines within the engine bay or HVAC system. It is specifically designed for vacuum hoses with a 4mm outer diameter, ensuring a secure and precise fit.

Fits:

• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988
• Porsche 968 3.0L 1992-94
• Porsche 968 Sport 3.0L 1994-95
• Porsche 968 CS 3.0L 1993-95
• Porsche 968 Turbo S 3.0L 1993-94
• Porsche 928S2 4.7L 1984-86

Diagram ref no 4

Manufactured to OEM standards, this connector is ideal for maintaining or restoring vacuum system integrity across multiple Porsche applications.

Key Features

• Universal-style vacuum Y-piece connector
• Suitable for Porsche 911, 964, 924S, 944, 968, and 928
• Designed for 4mm outer diameter vacuum hoses
• Enables splitting of vacuum lines
• OEM-style fit and function
• Durable construction for long-term reliability

Function and Purpose

This Y-piece is a critical connector within the vacuum system.

It helps to:

• Split a single vacuum line into two outputs
• Maintain proper vacuum routing
• Ensure consistent vacuum pressure distribution
• Support engine and HVAC system operation

Why Replace Your Vacuum Connector

Over time, vacuum connectors can degrade due to heat and age.

Common issues include:

• Cracked or brittle plastic
• Vacuum leaks
• Poor hose connections
• Engine or HVAC system malfunctions

Replacing the Y-piece restores proper vacuum system function.

• Loose or unsecured temperature sensor
• Incorrect temperature readings
• HVAC system inconsistencies
• Broken or missing connector clips

Replacing the lock piece restores proper sensor stability and function.

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

92857372702

The product you are viewing cross references to these numbers

Heater Box Drain Hose 

Maintain the efficiency and longevity of your classic Porsche heating system with this OE Match Heater Box Drain Hose. Manufactured to closely match the original factory specification, this ensures moisture and condensation are safely drained away from the heater box, helping to protect surrounding components from corrosion and deterioration.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)

Diagram ref no 19

Ideal for routine maintenance or full restoration projects, this OE Match drain hose provides the correct fit and reliable performance expected from an original-style replacement.

What Does the Heater Box Drain Hose Do?

The heater box drain hose plays an important role in the operation of the air-cooled Porsche heating system.

Its functions include:

• Draining condensation and moisture from the heater box.
• Helping prevent water from collecting inside the heating system.
• Protecting the heater box and surrounding bodywork from corrosion.
• Reducing the risk of trapped moisture causing rust or deterioration.
• Maintaining efficient operation of the heating and ventilation system.

Although often overlooked, this simple hose helps preserve both the heating system and the surrounding chassis.

Why Does the Heater Box Drain Hose Fail?

The original drain hose is continually exposed to heat, moisture, road debris and age, causing the rubber material to deteriorate over time.

Common causes of failure include:

• Rubber becoming brittle and cracking with age.
• Splits caused by repeated heat cycles.
• Hardening due to engine bay temperatures.
• Blockages from dirt, leaves or road debris.
• Perishing caused by prolonged exposure to moisture and contaminants.
• Damage during engine or heater system maintenance.

A damaged or blocked drain hose can allow moisture to remain inside the heater box, increasing the risk of corrosion and reducing heating system efficiency.

When Should It Be Replaced?

Replacement is recommended when:

• The hose is cracked, split or hardened.
• Signs of water retention or corrosion are found around the heater box.
• The heating system is being restored or serviced.
• The engine is removed, providing easy access.
• Restoring a classic Porsche to factory specification.
• Carrying out preventative maintenance on an ageing vehicle.

Replacing the drain hose is an inexpensive way to help protect the heating system and surrounding bodywork from long-term moisture damage.

OE Match Features

• OE Match quality replacement.
• Manufactured to replicate original factory dimensions.
• Durable rubber construction.
• Correct fit and routing for factory heater box assemblies.
• Helps maintain proper heater box drainage.
• Suitable for restoration, repair and preventative maintenance.       

Related reference numbers
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90157132632

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Engine to Left Heat Exchanger Hose 130mm x 60mm 

Maintain efficient cabin heating and proper airflow within your air-cooled Porsche with this OE Match Engine to Left Hand Heat Exchanger Hose. Measuring 130mm x 60mm, this hose is manufactured to the original factory specification.

Fits:

• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 964 (911) TURBO 3.3L 1991-93

Diagram ref no. 19

Designed for the Porsche 911 turbo (930) and Porsche 964 turbo, this hose connects the engine cooling fan housing to the left-hand heat exchanger, delivering the airflow required for the vehicle's heating system. Manufactured from durable, heat-resistant materials, it provides the correct fit and flexibility needed to withstand the demanding temperatures of the engine bay.

Whether you're replacing a deteriorated original hose or completing a full engine restoration, this OE Match component restores factory-style performance and appearance.

What Does the Engine to Heat Exchanger Hose Do?

The engine to heat exchanger hose is an essential part of the air-cooled Porsche heating system.

Its primary functions include:

• Directing cooling fan air from the engine to the left-hand heat exchanger.
• Providing the airflow required to generate warm air for the cabin heating system.
• Maintaining efficient airflow through the heat exchanger.
• Helping ensure effective windscreen demisting and cabin heating.
• Completing the sealed airflow path between the engine and heating components.

Without an airtight hose, airflow is reduced, resulting in diminished heating performance and reduced system efficiency.

Why Does the Heat Exchanger Hose Fail?

Located in the engine compartment, the hose is constantly exposed to high temperatures, engine vibration and environmental contaminants.

Common causes of deterioration include:

• Heat-related hardening and cracking.
• Rubber or reinforced material becoming brittle with age.
• Splits caused by engine movement and vibration.
• Damage during engine maintenance.
• Oil contamination reducing material strength.
• General wear after years of service.

A damaged hose allows cooling air to escape before reaching the heat exchanger, reducing heating efficiency and affecting overall airflow management.

When Should It Be Replaced?

Replacement is recommended when:

• The hose is cracked, split or torn.
• Heating performance has noticeably decreased.
• Air leaks are present within the heating system.
• The hose has become brittle or collapsed.
• Carrying out an engine or heating system restoration.
• Replacing heat exchangers or other heating system components.
• Performing preventative maintenance on older vehicles.

Replacing ageing heating hoses helps restore proper airflow, improve cabin heating performance and maintain the efficiency of the air-cooled heating system.

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

93021119601

The product you are viewing cross references to these numbers

Engine to heat exchanger hose 380mm x 60mm.

Fits:
Porsche 912
Porsche 911 1965-73
Engine to Heat Exchanger on the Left or Right

Fits:
Porsche 930 Turbo 1975-89
Porsche 911SC
Porsche 911 3.2L
Engine to Heat Exchanger on the right

This product supersedes Porsche's old part numbers:
- 90121119400

Diagram ref no. 20

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90121119401

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Engine to heat exchanger hose, 380mm x 60mm.
This is a high-quality replacement hot-air hose connecting the engine fan duct to the heat-exchanger in classic Porsche models. With an internal diameter of 60 mm and a length of 380 mm, this hose replicates the original specification, including the aluminium-lined construction and brown-paper exterior that Porsche used. 

Fits:
Porsche 912
Porsche 911 1965-73
Engine to Heat Exchanger on the Left or Right

Fits:
Porsche 930 Turbo 1975-89
Porsche 911SC
Porsche 911 3.2L
Engine to Heat Exchanger on the right

Diagram ref no. 20

• Position on Vehicle: Engine bay, connecting the engine fan duct/air-intake housing to the heat-exchanger (or heater box) via the hose (typically on the right side).

• Cross-Reference / Alternative Numbers: 901 211 194 01 (current) supersedes and replaces 901 211 194 00.

• Material & Construction: Crafted from heat-resistant aluminium-lined hose, clad externally with the original brown-paper finish and sized to match the factory shape (60mm inner diameter, ~380mm length). Built for high-temperature engine-bay environment and correct airflow performance.

• Applications: Ideal when the original hose is cracked, delaminated, deformed, missing, or when restoring correct heating/airflow behaviour in the engine bay or passenger compartment on classic air-cooled Porsche cars.

This hot-air hose plays a vital role in engine and cabin heat management: if it's cracked, collapsed, or detached, you may experience reduced heater output, engine-bay overheating, erratic air-flow, or loss of original ducting performance. Installing a correctly specified replacement restores the original system’s performance and helps maintain correct engine and cabin temperature control.

When and why to replace:
• Visible cracking, splitting, or sagging in the old hose.
• Hose has been removed, reused too often or replaced with incorrect diameter/length.
• Heater output is weak or airflow to engine/compartment is abnormal.
• Restoring a classic 911/930 and you require original spec parts for authenticity and functionality.




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

90121119401

The product you are viewing cross references to these numbers