Land Rover Discovery 4 L319 Fuel Line Pipe Tube Line Return AH22-9J338-AB

The Land Rover Discovery 4 L319 Fuel Line Return AH22-9J338-AB is an original fuel system component designed for the precise return of fuel to the system. Thanks to its factory geometry and perfect fit for the Discovery 4's construction, it ensures stable fuel system operation and reduces the risk of leaks. A used OEM component is a sensible choice for drivers who expect proven quality at an attractive price.

Specifications and technical data

• SKU: LR015416
• Mark: Land Rover
• Condition: Used
• OEM Part Number: LR015416
• Substitutable numbers: LR015416, AH229J338AB, AH22-9J338-AB, AH22-9C327-AB, AH229C327AB
• Part type: Hose
• Rim width: 9
• Category: Hoses, Lines & Pipes

Purpose and Function of the Return Line

The fuel return line in the Land Rover Discovery 4 L319 is responsible for safely returning excess fuel from the fuel rail or injectors back to the tank. A correctly selected component:

• stabilizes fuel system pressure,
• reduces the load on the fuel pump,
• minimizes the risk of air entering the system,
• ensures proper engine operation across the full range of loads.

By maintaining the original routing and diameter of the line, the fuel system retains the parameters specified by the vehicle manufacturer.

Construction and Fit for Land Rover Discovery 4

This line belongs to the category of Lines, Hoses, and Pipes, meaning it is designed as a component operating in the demanding environment of the engine bay. Appropriately selected materials and connectors allow for:

• resistance to typical engine operating temperatures,
• compatibility with factory quick connectors and mounting brackets,
• maintaining seal integrity under variable fuel pressure.

Its original origin from the Land Rover brand translates to proper routing relative to other components, reducing the risk of chafing and operational damage.

Benefits of Using an Original Fuel Line

Using a used, factory original return line in the Discovery 4 L319 is a solution that combines technical and economic aspects. Key benefits include:

• maintaining fuel system operating parameters consistent with the manufacturer's design,
• secure fit to engine mounts and accessories,
• reduced risk of leaks compared to random aftermarket replacements,
• the ability to restore proper system operation after a failure or service intervention.

For workshops and individual users, this means hassle-free installation and a lower risk of needing further intervention in the fuel system.

Used Condition and Service Aspects

This component is offered in used condition, which helps reduce repair costs while maintaining the original manufacturer's specifications. A return line of this type is particularly suitable for situations where:

• a quick replacement of a damaged section of the fuel line is necessary,
• adherence to the factory routing of lines is important,
• cost reduction compared to new OEM parts is desired.

It is always advisable to confirm the correct line selection based on vehicle data and the part number in the technical specification to ensure full compatibility with your specific Discovery 4 version.

Related Land Rover Fuel Lines and OEM Parts Knowledge

If you are planning comprehensive service for your Discovery 4's fuel system and are also interested in other fuel line components from this brand, check out the available parts in the Land Rover Lines, Hoses, and Pipes category.

To better understand why used, original fuel system components are a safe and cost-effective solution, we recommend reading our expert article: Quality and Safety Guarantee of OEM – Why Used Original Car Parts Are the Best Choice for Your Car?.