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- Accessories
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Expansion Tank Hoses
Fits:
Porsche 958 Cayenne 3.6L / S 4.8L / Turbo 4.8L 2011-18
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810631201
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
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12 Month Warranty
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Fits:
Porsche 958 Cayenne 3.6L / S 4.8L / Turbo 4.8L 2011-18
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810631201
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
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12 Month Warranty
Worldwide Delivery
Fits:
Porsche 958 Cayenne Turbo 4.8L 2011-17
Click 'Zoom in' for large parts diagram.
Diagram ref no 20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810642200
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
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12 Month Warranty
Worldwide Delivery
Fits:
Porsche 958 Cayenne Turbo 4.8L 2011-17
Click 'Zoom in' for large parts diagram.
Diagram ref no 20
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810642200
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
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12 Month Warranty
Worldwide Delivery
Breather Line, Radiator To Bleeder Valve.
Maintain proper cooling system ventilation and temperature control with the Breather Line, Radiator to Bleeder Valve. This OEM-quality breather line is designed to connect the radiator to the bleeder valve, allowing trapped air and vapor to escape from the cooling system for improved circulation and efficiency.
Fits:
Diagram Ref No 8
What This Product Does:
- Vents air from the radiator circuit
- Helps prevent air pockets that can restrict coolant flow
- Supports proper cooling system bleeding
- Maintains stable coolant pressure
- Helps regulate engine operating temperature
Symptoms Of Wear Or Failure:
- Coolant leaks near the radiator or bleeder valve connection
- Low coolant warning light
- Frequent coolant top-offs
- Sweet coolant smell from the engine bay
- Coolant residue or staining around fittings or clamps
- Cracked, brittle, or leaking line material
- Air trapped in the cooling system, causing gurgling sounds
- Fluctuating engine temperature or unstable gauge readings
- Overheating, especially after coolant service or refilling
- Steam from under the hood in severe cases
- Replacing a worn breather line is important because it ensures trapped air can properly escape from the cooling system. Over time, heat and coolant exposure can cause the line to crack, harden, or leak.
- If the breather line fails, air pockets may form in the radiator circuit, reducing coolant circulation and cooling efficiency. This can lead to unstable engine temperatures, overheating, and potential engine damage.
- Installing a new breather line helps maintain proper system bleeding, prevent leaks, and protect the engine by supporting reliable cooling system performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810631050
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Shop Securely
12 Month Warranty
Worldwide Delivery
Breather Line, Radiator To Bleeder Valve.
Maintain proper cooling system ventilation and temperature control with the Breather Line, Radiator to Bleeder Valve. This OE MATCH breather line is designed to connect the radiator to the bleeder valve, allowing trapped air and vapor to escape from the cooling system for improved circulation and efficiency.
Fits:
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Diagram Ref No 8
What This Product Does:
- Vents air from the radiator circuit
- Helps prevent air pockets that can restrict coolant flow
- Supports proper cooling system bleeding
- Maintains stable coolant pressure
- Helps regulate engine operating temperature
Symptoms Of Wear Or Failure:
- Coolant leaks near the radiator or bleeder valve connection
- Low coolant warning light
- Frequent coolant top-offs
- Sweet coolant smell from the engine bay
- Coolant residue or staining around fittings or clamps
- Cracked, brittle, or leaking line material
- Air trapped in the cooling system, causing gurgling sounds
- Fluctuating engine temperature or unstable gauge readings
- Overheating, especially after coolant service or refilling
- Steam from under the hood in severe cases
- Replacing a worn breather line is important because it ensures trapped air can properly escape from the cooling system. Over time, heat and coolant exposure can cause the line to crack, harden, or leak.
- If the breather line fails, air pockets may form in the radiator circuit, reducing coolant circulation and cooling efficiency. This can lead to unstable engine temperatures, overheating, and potential engine damage.
- Installing a new breather line helps maintain proper system bleeding, prevent leaks, and protect the engine by supporting reliable cooling system performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810631050
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 958 Cayenne S 4.8L / Turbo 4.8L 2011-18
Click 'Zoom in' for large parts diagram.
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810631005
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
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12 Month Warranty
Worldwide Delivery
Maintain proper cooling system ventilation and engine temperature stability with the Breather Valve to Radiator Vent Line. This OEM-quality vent line is designed to connect the breather valve to the radiator, allowing trapped air and vapor to escape from the cooling system for improved circulation and efficiency.
Fits:
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Diagram Ref No 8
What This Product Does:
- Vents air from the radiator circuit
- Prevents air pockets that can restrict coolant flow
- Supports proper cooling system bleeding
- Maintains stable coolant pressure
- Helps regulate engine operating temperature
Symptoms Of Wear Or Failure:
- Coolant leaks near the breather valve or radiator connection
- Low coolant warning light
- Frequent coolant top-offs
- Sweet coolant smell from the engine bay
- Coolant residue or staining around fittings or clamps
- Cracked, brittle, or leaking line material
- Air trapped in the cooling system, causing gurgling sounds
- Fluctuating engine temperature or unstable gauge readings
- Overheating, especially after coolant service or refilling
- Steam from under the hood in severe cases
- Replacing a worn breather valve to radiator vent line is essential for maintaining proper cooling system ventilation and pressure balance. Over time, heat and coolant exposure can cause the line to crack, harden, or leak.
- If the vent line fails, air can become trapped in the radiator circuit, reducing coolant circulation and cooling efficiency. This may lead to fluctuating engine temperatures, overheating, and potential engine damage.
- Installing a new vent line helps ensure proper system bleeding, prevents leaks, maintains stable coolant pressure, and protects the engine from heat-related issues.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810631005
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
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12 Month Warranty
Worldwide Delivery
The Porsche Coolant Return Hose 95810655050 is a genuine replacement cooling-system hose designed for Porsche Cayenne 958 applications.
Fits:
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Diagram Ref No 17
The hose forms part of the engine cooling circuit, carrying coolant between the expansion tank, radiator and associated coolant pipework. By providing a sealed return path, it helps maintain continuous coolant circulation and stable engine operating temperatures.
Manufactured to Porsche specifications, this replacement hose restores the original routing, connection points and cooling-system integrity when the existing hose has become cracked, hardened, swollen or is leaking.
What This Product Does:
The engine cooling system continuously circulates coolant to absorb heat from the engine and release it through the radiator.
The return hose forms part of this circulation loop and allows coolant to flow back through the system after passing through cooling-system components.
Its main functions include:
- Carrying coolant through the return side of the cooling circuit
- Maintaining continuous coolant circulation
- Helping maintain correct cooling-system pressure
- Supporting stable engine operating temperatures
- Providing a sealed connection between cooling-system components
- Helping prevent coolant loss
- Maintaining the original factory coolant routing
- Supporting efficient engine heat management
The hose itself does not cool the engine directly, but uninterrupted coolant flow through it is essential for the cooling system to work correctly.
Symptoms Of Wear Or Failure:
Coolant hoses are continually exposed to heat, pressure, vibration and chemical contact with engine coolant. Over time, the hose material and connections can deteriorate.
Common symptoms that may indicate replacement is required include:
- Visible coolant leaks
- Dampness around the hose or connections
- Pink, white or coloured coolant residue around joints
- Cracks or splits in the hose
- Swollen or bulging sections
- Hose becoming unusually soft or spongy
- Rubber becoming hard or brittle
- Low coolant warning message
- Repeated need to top up the coolant
- Sweet coolant smell from the engine bay
- Engine temperature running higher than normal
- Fluctuating coolant temperature
- Steam from the engine compartment in severe cases
- Damage or leakage around quick-connect fittings
A low coolant level or overheating can also result from leaks elsewhere in the cooling system, so the complete circuit should be inspected.
Why Replacement Matters:
The cooling system must remain sealed and properly pressurised to control engine temperature effectively.
If the coolant return hose develops a leak, coolant can escape and the system may gradually lose pressure. As the coolant level drops, the engine's ability to transfer and dissipate heat is reduced.
A small leak can quickly become more serious if an ageing hose splits under operating pressure.
Continued driving with insufficient coolant can cause:
- Engine overheating
- Cylinder-head or head-gasket damage
- Damage to seals and cooling-system components
- Reduced engine reliability
- Breakdown caused by sudden coolant loss
Replacing a deteriorated hose helps restore:
- Correct coolant circulation
- Proper cooling-system pressure
- A leak-free cooling circuit
- Stable engine temperature
- Reliable long-term cooling-system operation
Replacing the hose at the first signs of cracking, swelling or leakage can help prevent a relatively inexpensive hose fault from developing into a much more costly overheating problem.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810655050
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne V6 3.6L Petrol (300Hp) 2010-17
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 958 Cayenne S / GTS 4.8ltr V8 - 2010 to 2017
Porsche 958 Cayenne turbo / turbo S - 2010 to 2017
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810631101
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 958 Cayenne S / GTS 4.8ltr V8 - 2010 to 2017
Porsche 958 Cayenne turbo / turbo S - 2010 to 2017
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810631101
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 958 Cayenne S / GTS 4.8ltr V8 - 2010 to 2017
Porsche 958 Cayenne turbo / turbo S - 2010 to 2017
Click 'Zoom in' for large parts diagram.
Diagram ref no 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810626101
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 958 Cayenne S / GTS 4.8ltr V8 - 2010 to 2017
Porsche 958 Cayenne turbo / turbo S - 2010 to 2017
Click 'Zoom in' for large parts diagram.
Diagram ref no 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95810626101
The product you are viewing cross references to these numbers
- Porsche 958 Cayenne S V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne GTS V8 4.8L Petrol (400Hp) 2010-17
- Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
- Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
Shop Securely
12 Month Warranty
Worldwide Delivery
Expansion Tank Coolant Hoses – Reliable Cooling Connections for Porsche Vehicles
Expansion tank coolant hoses are essential components in your Porsche’s cooling system. They connect the coolant expansion tank (reservoir) to the radiator, water pump, and engine, allowing the system to maintain correct pressure and coolant levels during operation. These hoses ensure that excess coolant flows smoothly between the tank and the rest of the system — preventing overheating, leaks, and pressure loss.
At Design911, we supply a full range of genuine and manufacturer-quality expansion tank coolant hoses for Porsche models including 911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each hose is engineered for precise fitment, heat resistance, and long-term durability, ensuring your Porsche’s cooling system performs exactly as intended by the manufacturer.
What Do Expansion Tank Coolant Hoses Do?
Expansion tank hoses act as the link between the coolant
reservoir and the engine cooling circuit, helping to:
- Transport
coolant to and from the expansion tank as temperatures fluctuate.
- Maintain
proper pressure balance within the cooling system.
- Allow
coolant recovery as the system heats up and cools down.
- Prevent air pockets that can cause inefficient cooling or engine overheating.
Without properly functioning hoses, the cooling system cannot maintain the balance of pressure and temperature required for optimal performance.
Why Do Expansion Tank Coolant Hoses Fail?
Due to constant exposure to heat, pressure, and coolant
chemicals, these hoses can degrade or fail over time. Common causes include:
- Rubber
fatigue or cracking from repeated heat cycles.
- Coolant
leaks caused by weakened hose ends or clamps.
- Swelling
or softening from prolonged coolant contact.
- Aging
materials losing elasticity and sealing ability.
- Corrosion or contamination around connectors and fittings.
Typical signs of failure include visible cracks, coolant leaks near the expansion tank, fluctuating coolant levels, or overheating warnings.
Why Replace Faulty Expansion Tank Coolant Hoses?
A damaged or leaking expansion tank hose can cause coolant loss, air pockets, or pressure imbalance, leading to overheating or potential engine damage. Replacing these hoses is a simple but critical maintenance step to keep your Porsche’s cooling system running reliably.
Benefits of replacement include:
- Restored coolant flow and pressure regulation.
- Prevention of leaks and air ingress.
- Enhanced engine performance and temperature stability.
- Long-lasting, manufacturer-quality durability and fitment.
All hoses in this range are made using high-grade, reinforced materials designed to meet or exceed factory standards, ensuring exceptional performance, heat resistance, and reliability under all driving conditions.
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