Range Rover Mk3 L322 Air Conditioning Water Heater Pipe Hose Line AH42-4090-BA

The Range Rover L322 Air Conditioning Heater Hose is an original component of the cabin cooling and heating system, designed for the third-generation Range Rover models. This used, factory Land Rover part ensures the correct flow of heating medium between the heater and other system components, contributing to stable air conditioning and interior heating performance. It's a solution for owners who want to maintain consistency with the vehicle's factory construction and avoid issues with aftermarket part fitment.

Specifications and technical data

• SKU: AH42-4090-BA
• Mark: Land Rover
• Condition: Used
• OEM Part Number: AH42-4090-BA
• Substitutable numbers: AH42-4090-BA, AH424090BA, LR014616
• Part type: Hose
• Category: A/C Hoses & Fittings

Purpose and Function in the Air Conditioning System

This heater water hose operates within the coolant circuit, working in conjunction with the heater and other air conditioning and heating system components. It is responsible for:

• stable delivery of heating medium to the heater,
• maintaining the seal of connections in the engine bay,
• preserving the factory routing geometry of the hoses, which reduces the risk of chafing and leaks.

By maintaining its original shape and diameters, the hose is compatible with factory connectors and mountings, facilitating vehicle assembly and servicing.

Original Land Rover Part – Benefits of Use

As a component from the Air Conditioning Hoses, Pipes, and Connectors group, dedicated to the Range Rover Mk3 L322, the heater hose provides:

• factory fitment to the cooling and air conditioning system of the specific model,
• compatibility with original clamps, quick connectors, and brackets,
• maintenance of manufacturer-designed flow and sealing parameters.

Choosing an original Land Rover part minimizes the risk of installation problems, leaks, or improper hose routing in the engine bay, which is particularly important in vehicles with complex air conditioning systems.

Used Condition and Installation Aspects

The hose is offered in used condition, allowing for cost-effective system repair while maintaining the original manufacturer's specifications. Before installation, it is recommended to:

• inspect the connector surfaces for mechanical damage,
• check the flexibility of the rubber sections,
• inspect mounting sockets and hose routing points.

A properly selected heater hose helps restore correct cabin heating operation, reduce the risk of system airlocks, and prevent coolant leaks.

Application in Service and Diagnostics

A component of this type is particularly useful in situations where the vehicle exhibits:

• decreased interior heating performance,
• signs of leaks around the heater or water hoses,
• mechanical damage to hoses from previous repairs.

Replacing the heater hose with an original Land Rover component restores proper coolant circulation in the heater circuit, directly impacting cabin thermal comfort and the stable operation of the air conditioning system.

If you need other cooling and air conditioning system components dedicated to this brand, including additional hoses, pipes, or connectors compatible with the heater and evaporator, check the available parts in the Land Rover Air Conditioning Hoses, Pipes, and Connectors category.

More About Premium Used Parts

If you are interested in the broader context of using used, original components in premium cars and want to better understand how such solutions affect service costs and repair durability, it is worth reading the material: Used Parts for Mercedes - Original Dismantled Parts. Although it concerns a different brand, it effectively illustrates the advantages of using factory dismantled components in higher-class vehicles.