Engine Block Hoses

Cooling water tube heating.



Fits:
Porsche 955 Cayenne 4.5L S 2003-06
Porsche 955 Cayenne 4.5L Turbo

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


Note:
We recommend changing / upgrading the complete set as the bottom pipe also tents to split.
You can buy the upgrade kit Code: WATERPIPEKIT01 (Porsche Brand) or WATERPIPEKIT03 (URO Brand).

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94810605906

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Cooling water tube heating.



Fits:
Porsche 955 Cayenne 4.5L S 2003-06
Porsche 955 Cayenne 4.5L Turbo

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


Note:
We recommend changing / upgrading the complete set as the bottom pipe also tents to split.
You can buy the upgrade kit Code: WATERPIPEKIT01 (Porsche Brand) or WATERPIPEKIT03 (URO Brand).

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Related, superseded, cross reference or alternative numbers for comparison.

94810605906

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Cooling water tube lower.



Fits:
Porsche 955 Cayenne 4.5L S 2003-06
Porsche 955 Cayenne 4.5L Turbo

Click 'Zoom in' for large parts diagram.
Diagram ref no 7.

Note:
We recommend changing / upgrading the complete set as the bottom pipe also tends to split.
You can buy the upgrade kit Code: WATERPIPEKIT01 (Porsche Brand) or WATERPIPEKIT03 (URO Brand).

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94810604907

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The part reference 948 106 059 06, commonly referred to as the cooling water tube heating or heater pipe, is a critical component in the engine cooling system of the 2003–2006 Porsche Cayenne 955 models equipped with the 4.5L V8 engine (S and Turbo variants). This part facilitates the distribution of coolant to the heater core, ensuring proper cabin heating and contributing to overall engine temperature regulation. cars with the old plastic pipe suffer from cracking or brittle pipes. 



Fits:
Porsche 955 Cayenne 4.5L S 2003-06
Porsche 955 Cayenne 4.5L Turbo

Click 'Zoom in' for large parts diagram.
Diagram ref no 7.

Note:
We recommend changing / upgrading the complete set as the bottom pipe also tends to split.
You can buy the upgrade kit Code: WATERPIPEKIT01 (Porsche Brand) or WATERPIPEKIT03 (URO Brand).

Related reference numbers
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94810604907

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Distributor tube coolant gasket.



Fits:
Porsche 955 Cayenne 4.5L S 2003-06
Porsche 955 Cayenne 4.5L Turbo

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

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94810615305

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Lower water tube adapter.



Fits:
Porsche 955 MKI Cayenne S 2003-06
Porsche 955 MKI Cayenne Turbo 2003-06

Click 'Zoom in' for large parts diagram.
Diagram Ref No 11.

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94810623000

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Lower water tube adapter.



Fits:
Porsche 955 MKI Cayenne S 2003-06
Porsche 955 MKI Cayenne Turbo 2003-06

Click 'Zoom in' for large parts diagram.
Diagram Ref No 11.

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94810623000

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Lower water tube o-ring (47 x 4)



Fits:
Porsche 955 MKI Cayenne S 2003-06
Porsche 955 MKI Cayenne Turbo 2003-06

Click 'Zoom in' for large parts diagram.
Diagram Ref No 8.

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99970737041

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O ring seal for water pipe - 28 x 3



Fits:
Porsche 955 Cayenne S - 2003 to 2006
Porsche 955 Cayenne turbo - 2003 to 2006

Click 'Zoom in' for large parts diagram.
Diagram ref no 15

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99970751841

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O-ring - 21.2 x 3.55 - for the metal coolant supply pipe which directs coolant to the oil cooler inlet hose and the alternator coolant supply hose. 

Fits:
Porsche 955 Cayenne S 4.5L V8 2003-06
Porsche 955 Cayenne Turbo 4.5L V8 2003-06

Diagram ref. 2. 


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99970753740

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O-ring for alternator. 10 x 4.
Sold each - 2 required per car

Fits:
Porsche 955 Cayenne 3.2L >>2005

Diagram ref no 12

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95510666600

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Water coolant hose for turbocharger cooler system. 



Fits:
Porsche 955 Cayenne turbo - 2003 to 2006

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

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94810637352

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Water Coolant Hose – Essential for Reliable Cooling System Performance

This water coolant hose s designed for the Porsche 955 and 957 models, forming a critical part of the engine’s cooling circuit. It transports coolant to and from the engine and radiators, ensuring proper heat dissipation and stable operating temperatures—vital for high-performance V8 engines.

Fits:

• Porsche 955 Cayenne 3.2L V6 2003-06
• 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>>
• Porsche 957 Cayenne 3.6L 2007-10
• Porsche 957 Cayenne S/GTS 4.8L 2007-10
• Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10

Diagram ref no 29

With age and heat cycles, coolant hoses can weaken, crack or develop internal swelling. A compromised hose may cause coolant leaks, overheating, reduced engine performance or complete cooling system failure. Replacing a worn hose with a high-quality alternative ensures the V8 Cayenne continues to run cool, efficient and trouble-free.

What This Coolant Hose Does

This specialised coolant hose:

• Transfers coolant between key cooling components
• Maintains optimal engine temperature under load
• Helps prevent overheating during towing or spirited driving
• Supports proper coolant circulation in V8 Cayenne engines
• Seals securely to avoid leaks and pressure loss

A healthy coolant hose is essential for maintaining engine reliability, especially in high-output S, GTS and Turbo variants.

Why Coolant Hoses Fail on Porsche Cayenne V8 Engines

Typical issues include:

• Heat-induced rubber degradation from repeated thermal cycles
  
• Cracking or splitting caused by age and vibration
  
• Internal hose collapse, restricting coolant flow
  
• Coolant contamination, accelerating material breakdown
  
• Pressure spikes from failing thermostats or caps
  
• Exposure to oil, which weakens hose material

Symptoms of failure may include coolant smells, visible drips, overheating warnings, or low coolant levels.

Why You Should Replace a Faulty Coolant Hose

Replacing a worn coolant hose provides:

• Restored coolant pressure and circulation efficiency
• Prevention of leaks and overheating
• Protection of sensitive engine components
• Reduced risk of roadside breakdowns
• Improved long-term reliability for engines

Given the high engine bay temperatures in Cayenne, S, GTS and Turbo models, replacing hoses proactively is a smart preventative step.

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95510607300

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Water Coolant Hose.
The OE Match Water Coolant Hose is a high-quality replacement cooling system hose designed to ensure the efficient circulation of engine coolant between key cooling system components on compatible Porsche models. Manufactured to OE specifications for fit, flexibility and durability, this hose helps maintain optimum engine operating temperature by providing a secure, unrestricted flow of coolant.  

Fits:

• Porsche 955 Cayenne 3.2L V6 2003-06
• 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>>
• Porsche 957 Cayenne 3.6L 2007-10
• Porsche 957 Cayenne S/GTS 4.8L 2007-10
• Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10

Diagram Ref No 29

Constructed from premium multi-layer reinforced EPDM rubber, the hose is engineered to withstand high coolant pressures, extreme temperature fluctuations, engine vibration and long-term exposure to coolant. Precision-moulded to match the original factory routing, it provides direct OE-style fitment and dependable, leak-free performance.  

What This Product Does:

• Transfers coolant between engine cooling system components.
• Maintains continuous coolant circulation.
• Helps regulate engine operating temperature.
• Supports efficient heat dissipation from the engine.
• Provides a secure, leak-free coolant connection.
• Withstands high pressure and temperature changes.
• Helps prevent engine overheating.
• Forms an essential part of the vehicle's cooling system.

Symptoms Of Wear Or Failure:

• Visible coolant leaks.
• Cracked, split or swollen hose.
• Soft, brittle or deteriorated rubber.
• Coolant smell from the engine bay.
• Low coolant level.Engine overheating.
• White, pink or blue coolant residue around hose connections.
• Bulging hose when under pressure.
• Steam from the engine compartment.
• Coolant warning light or frequent coolant top-ups.

Why Replacement Matters:

• Coolant hoses operate in demanding conditions, where they are exposed to constant pressure cycles, hot coolant, engine vibration and changing temperatures. Over time, the rubber can harden, crack or weaken, while the internal reinforcement may deteriorate, increasing the risk of coolant leaks or sudden hose failure.
• A leaking or burst coolant hose can quickly reduce coolant levels, leading to engine overheating and potentially severe engine damage, including cylinder head distortion, head gasket failure and premature wear of internal engine components. Even a minor leak can reduce cooling system efficiency and result in costly repairs if left unattended.
• Replacing a worn or damaged coolant hose restores the integrity of the cooling system and ensures reliable coolant circulation. The OE Match replacement provides factory-style fitment, premium-quality materials and long-lasting durability, helping maintain optimum engine temperature, improve reliability and protect the performance and longevity of your Porsche.

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95510607300

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Water Cooling Pipe System Upgrade

The OE Match Water Cooling Pipe System Upgrade is a permanent solution to one of the most common and well-known cooling system failures affecting the first-generation Porsche 955 Cayenne 4.5L V8 S and Turbo models built between 2003 and 2006.

Fits:

• 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>>

Diagram ref Nos 7, 9, 10, 11, 12, 13, 16 and 17

The original factory cooling system uses a series of plastic coolant pipes located beneath the intake manifold to carry coolant between the engine block, thermostat housing and cylinder heads. While perfectly adequate when new, years of repeated heat cycles cause these plastic pipes to become brittle and lose their structural integrity. Eventually they can soften, crack or separate from their bonded joints, leading to sudden coolant loss and rapid engine overheating.

Porsche later introduced an improved aluminium pipe design to eliminate this weakness. This OE Match upgrade kit replaces the original plastic coolant pipes with durable alloy replacements, providing a long-term repair that is far more resistant to heat, pressure and age-related deterioration.

A failed coolant pipe can result in coolant leaking into the engine valley beneath the intake manifold, where it may initially go unnoticed. Drivers often first discover the problem through unexplained coolant loss, coolant odours, warning messages or engine overheating. Continuing to drive with a leaking pipe can lead to severe engine damage, making early replacement a wise preventative maintenance upgrade.

Replacement is strongly recommended if the intake manifold is already being removed for other engine work, such as starter motor replacement, knock sensor replacement or general engine servicing. Many owners also choose to install the alloy upgrade proactively once their Cayenne reaches higher mileage or shows signs of cooling system deterioration.

Features & Benefits

• OE Match alloy water cooling pipe upgrade kit
• Replaces the original plastic coolant pipes
• Eliminates a common failure point on early 4.5L V8 engines
• Improved resistance to heat and coolant pressure
• Reduces the risk of sudden coolant loss and engine overheating
• Ideal preventative maintenance upgrade
• Suitable for Porsche 955 Cayenne 4.5L S and Turbo models (2003-2006)
• Direct replacement for the original cooling pipe assembly

Porsche 955 Cayenne Alloy Water Cooling Pipe Upgrade

The first-generation Porsche Cayenne is renowned for its performance and versatility, but owners of the early 4.5-litre V8 models are often familiar with the factory plastic coolant pipe issue. Upgrading to the later alloy pipe design is widely regarded as one of the most important preventative maintenance improvements for these vehicles.

At Design911, we supply high-quality OE Match cooling system components that restore reliability while maintaining original fitment standards. Whether you're carrying out preventative maintenance, repairing a coolant leak or rebuilding your engine, this alloy coolant pipe upgrade offers lasting peace of mind.

Why Upgrade to Alloy Coolant Pipes?

Unlike the original plastic pipes, alloy pipes are unaffected by prolonged exposure to engine heat and pressure. Once installed, they provide a significantly more durable cooling system capable of withstanding the demanding operating temperatures of the Porsche V8 engine.

Common Symptoms of Failing Plastic Coolant Pipes

• Unexplained coolant loss
• Coolant smell after driving
• Coolant pooling beneath the intake manifold
• Low coolant warning messages
• Rising engine temperatures or overheating
• Steam from the engine bay

Replacing the plastic coolant pipes before failure helps avoid costly overheating repairs and significantly improves long-term engine reliability

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948106059KIT

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Water Hose.



Fits:
Porsche 955 Cayenne S 4.5L 2003-06 (IT90)

Click "Zoom in" to see the diagram.
Diagram ref no 18.

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