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Water Pump and Ancillary Hoses
- 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>>
Fits:
Porsche 955 Cayenne S 4.5L V8 2003-06
Porsche 955 Cayenne Turbo 4.5L V8 2003-06
Diagram ref. 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970753740
The product you are viewing cross references to these numbers
Water Pump & Ancillary Hoses – Essential Cooling Components for Porsche Performance
Water pump and ancillary hoses are key elements of your Porsche’s cooling system, ensuring efficient coolant circulation between the water pump, radiator, expansion tank, and engine block. These hoses deliver and regulate coolant flow, maintaining stable engine temperatures and preventing overheating under high-performance conditions.
At Design911, we stock a comprehensive range of genuine and manufacturer-quality water pump and ancillary hoses for Porsche models including transaxle, 911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each hose is designed for precise fitment, high temperature resistance, and long-term reliability — matching the quality and durability of the original factory components.
What Do Water Pump & Ancillary Hoses Do?
Water pump and ancillary hoses work together as part of the
cooling network to:
- Circulate
coolant through the engine, radiator, and water pump.
- Regulate
temperature for optimal engine efficiency and longevity.
- Maintain
coolant pressure and prevent system airlocks.
- Support auxiliary components such as heater cores and turbo cooling lines.
These hoses ensure consistent coolant flow throughout the system, enabling your Porsche to perform safely at high temperatures and speeds.
Why Do Water Pump and Ancillary Hoses Fail?
Over time, hoses are exposed to constant heat, vibration,
and chemical contact with coolant — factors that can lead to wear and failure.
Common causes include:
- Thermal
degradation from repeated heating and cooling cycles.
- Cracking
or hardening of rubber due to age or coolant additives.
- Leaks
at hose ends or clamps from loss of flexibility or pressure.
- Abrasion
or rubbing against surrounding components.
- Swelling or soft spots from internal coolant corrosion.
Symptoms of failure include coolant leaks, overheating, visible cracks, or the smell of coolant in the engine bay.
Why Replace Faulty Water Pump & Ancillary Hoses?
A leaking or degraded hose can cause serious engine damage by disrupting coolant circulation and leading to overheating. Replacing old or worn hoses ensures your Porsche’s cooling system functions efficiently and safely.
Benefits of replacement include:
- Restored coolant flow and system pressure.
- Prevention of leaks and overheating.
- Enhanced reliability and performance under load.
- Manufacturer-quality materials and factory-accurate fitment.
All hoses in this range are constructed from high-performance, reinforced rubber compounds that meet or exceed Porsche’s engineering standards, ensuring long-term durability, flexibility, and heat resistance.
