Water hose, supply. Porsche 958 Cayenne 3.0L Hybrid 2015-18  ❭  95810640221

Water hose, supply.
This flexible coolant return hose is a genuine Porsche part designed for precision fitment, long-lasting durability, and reliable service in the engine cooling circuit of hybrid-equipped Cayenne models. This radiator coolant return hose is specified for use on the Porsche 958 Cayenne Hybrid, especially models equipped with the 3.0 L V6 hybrid powertrain produced approximately 2015 to 2018, where it forms part of the main radiator coolant system.

Fits:
Porsche 958 Cayenne 3.0L Hybrid  2015 - 2018

Diagram ref no 12

This coolant return hose plays a vital role in the engine’s liquid cooling system by routing coolant back toward the radiator after it has circulated through components such as the engine block and auxiliary coolers. Proper routing and leak-resistant sealing ensure that the cooling system maintains correct flow and pressure, helping the engine operate within optimal temperature limits and reducing the risk of overheating under typical driving conditions and higher loads.

Fitment / Position on Car
•  Installed on: Engine cooling return pathway
• Location: Connects radiator system return lines toward the main radiator inlet / network
•  System interface: Works alongside upper/lower hoses, thermostat housings, coolant pipes and radiator fittings to ensure continuous coolant flow throughout the circuit.

Coolant hoses operate under continuous thermal stress, pressure fluctuations, and vibration. Over time, hoses can soften, crack, or start leaking, leading to coolant loss and potential engine overheating. Using a genuine Porsche OE return hose ensures the correct hose design, material formulation, and connections - preserving cooling system integrity and performance. This helps maintain consistent engine temps, protects internal components from thermal stress, and supports overall engine durability.

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