Genuine Lower Radiator Hose PEH000080 Discovery II L318

The cooling system on the Discovery Series II L318 does a demanding job, and every hose in that circuit matters. This is the Genuine Land Rover lower radiator hose for the Discovery Series II, carrying coolant between the thermostat housing and the water pump to keep the 4.0L and 4.6L Rover V8 running at the correct operating temperature across every driving condition. Because it runs the thermostat-to-water-pump circuit, the hose is a direct participant in every warm-up and cool-down cycle your engine goes through, making its condition critical to the health of the entire cooling system. Cracking, swelling, or softening of an aging hose here can lead to coolant loss, rising temperatures, and ultimately serious engine damage if left unaddressed.

This part is Genuine Land Rover, meaning it carries the factory part number PEH000080 and is manufactured to the exact routing geometry, wall thickness, and material specification that Land Rover engineered for the Discovery Series II platform. When you fit a Genuine part, you eliminate any guesswork about fitment or longevity because it is, quite simply, the same hose that left the factory. For a cooling system component that sees continuous heat and pressure cycling, that matters.

Replacing this hose is strongly recommended any time the thermostat or water pump is being serviced, or as part of a comprehensive cooling system refresh. Inspect and replace the hose clamps at the same time if they show any sign of corrosion or fatigue, and ensure the system is fully bled after refill to remove any trapped air pockets.

Fits: Discovery Series II L318 (1999 to 2004) 4.0-liter Rover V8 Petrol/Gas

Part Number: PEH000080 Free shipping to the lower 48!

[FAQ]

What is the function of this hose in the cooling system?

This hose connects the thermostat housing to the water pump, forming a key link in the coolant circuit. Once the thermostat opens at operating temperature, coolant flows through this hose toward the water pump, which circulates it through the engine block. A failed or deteriorated hose in this location can interrupt coolant flow and lead to overheating.

Why choose Genuine Land Rover over a non-Genuine alternative for this part?

Genuine Land Rover hoses are manufactured to factory specifications for material, wall thickness, and routing geometry, ensuring a precise fit and predictable service life. For a cooling system component that operates under continuous heat and pressure, using the Genuine part means you are installing exactly what the engineers specified for the Discovery Series II platform.