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Radiator coolant hose clamp. Porsche 955 Cayenne S / 955 Cayenne Turbo ❭ 95551240400
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
- Porsche 955 Cayenne Turbo S 4.5L 2006>>
Genuine Porsche OE radiator coolant hose clamp B51x12 for Porsche 955 Cayenne S and 955 Cayenne Turbo models. This original Porsche coolant hose clamp is used within the radiator / cooling hose system, helping secure coolant hoses correctly and maintain a reliable seal under cooling system pressure.
Sold individually, 2 required
Fits:
Porsche 955 Cayenne S 4.5L V8 2003 - 2006
Porsche 955 Cayenne Turbo 4.5L 2003 - 2006
Porsche 955 Cayenne Turbo S 4.5L 2006>>
Diagram ref no 10
This clamp is used on selected Porsche Cayenne 955 cooling system hose connections.
What This Part Does / Functions
• Secures radiator and coolant hoses in position
• Helps maintain a tight seal at hose connection points
• Prevents coolant leaks caused by loose or weakened clamps
• Supports correct cooling system pressure retention
• Helps maintain coolant flow through the radiator circuit
• Provides correct OE Porsche clamp size and fitment
• Replaces a corroded, weakened, damaged or missing original clamp
• Supports reliable engine cooling system operation.
Why Replace This Part?
Coolant hose clamps are exposed to heat cycles, coolant, moisture, road debris and engine bay vibration. Over time, a clamp can corrode, weaken, lose tension or become damaged during hose removal. A poor clamp can allow coolant seepage or hose movement, which may lead to coolant loss, low coolant warnings or overheating. Replacing it with a Genuine Porsche OE radiator coolant hose clamp helps ensure the hose is secured using the correct factory-specified clamp for the application.
When to Replace This Part
• When replacing radiator coolant hoses
• If the existing clamp is corroded, loose or damaged
• If coolant seepage is present at the hose connection
• During radiator, expansion tank or cooling system repairs
• If the original clamp has lost tension
• If the clamp was damaged during removal
• During preventative cooling system overhaul
• When restoring the vehicle with correct Genuine Porsche hardware.
Where It Fits on the Car
This clamp fits within the engine cooling system / radiator hose assembly. It is used to secure coolant hose connections at the radiator, expansion vessel or related water hose pipework depending on the specific Cayenne application.
Correct positioning is important to ensure the hose seats properly and seals without damage.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95551240400
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86

Fits:
Porsche 928 1978-1984
Click 'Zoom in' for large parts diagram.
Diagram ref no 19
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810623806
The product you are viewing cross references to these numbers
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Replacement hose for the upper radiator hose used in Porsche 928 models. It connects the radiator to the temperature regulator (thermostat/expander) housing, which is part of the engine cooling system. It ensures proper coolant flow between the radiator and engine, supporting precise temperature control.
Fits:
Porsche 928 1978 - 1984
Diagram ref no 19
• Location: Upper radiator hose — radiator to thermostat / water-regulator housing
• Use Case: Replacement during maintenance, cooling system overhaul, or when hose shows leak, age or wear
Manufactured to the original dimensions, inside diameter, and hose shape, this replacement hose ensures a proper fit and reliable seal without the need for modification. Made of high-quality, heat-resistant rubber, it withstands engine temperatures, pressure cycles, and coolant exposure, ensuring reliable, long-lasting performance.
This hose is especially useful when the original hose becomes brittle, cracked, swollen, or leaking, which are common problems in older cooling systems. Installing a new hose helps prevent coolant leaks, overheating, and potential engine damage.
Hoses degrade over time due to heat, coolant chemicals, age, and repeated expansion / contraction. A failing radiator hose can lead to:
• Coolant leaks under bonnet or beneath car
• Engine overheating or overheating under heavy load
• Loss of coolant pressure or coolant circulation
• Risk of engine damage due to poor cooling
Replacing it with a correctly spec’d hose helps maintain coolant circulation, prevents leaks, and safeguards the engine’s cooling system reliability.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810623806
The product you are viewing cross references to these numbers
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