Heater hoses & pipes

Fits:
Porsche 911 1978-89 LHD Cars
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Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91157317300
The product you are viewing cross references to these numbers
- 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

Fits:
Porsche 911 Carrera (1987 to 1989)
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Diagram ref no 31
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91157311501
The product you are viewing cross references to these numbers
- Porsche 911 1987-1989 3.2L G50

Fits:
Porsche 911 Carrera (1986 - 1987)
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Diagram ref no 28
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91157232500
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50

Fits:
Porsche 911 1984-89
Diagram ref no 14
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970307740
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50

Fits:
Porsche 911 1973-89
Click picture for large parts diagram.
Diagram ref No 12
Price is for each clamp.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99951234901
The product you are viewing cross references to these numbers
- 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)
Fits:
Porsche 911 1965-89 all models
Diagram ref no 34
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90157291301
The product you are viewing cross references to these numbers
- 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)
Fits:
Porsche 911 1965-89 all models
Diagram ref no 34
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90157291301
The product you are viewing cross references to these numbers
- 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)
Fits:
Porsche 911 1968-89
Diagram ref no 19
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90157132632
The product you are viewing cross references to these numbers
- 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)
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
Related reference numbers
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90121119401
The product you are viewing cross references to these numbers
- 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)
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90121119401
The product you are viewing cross references to these numbers
- 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)
Fits: Left or right side
Fits:
Porsche 911/912 1965-89
Porsche 930 (911) Turbo 1975-89
Diagram ref no 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91121129700
The product you are viewing cross references to these numbers
- 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)

Fits:
Porsche 911 2.7L-3.3 08/1973-07/1986
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Diagram ref 20.
Related reference numbers
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91165911901
The product you are viewing cross references to these numbers
- 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)

Fits:
Porsche 911 Carrera 1984-89
Engine Type: 93020, 93021, 93025, 93026
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Diagram ref no 17
Related reference numbers
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93021133701
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50

Fits:
Porsche 911 3.2L Carrera 1984-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Shown price is for each clamp.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG51208702
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50

Fits:
Porsche 911 Carrera 3.2L 1984-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 13.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93021134103
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50

Fits:
Porsche 911 Carrera 3.2L 1984-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 8.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93021158100
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
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.