Land Rover Discovery 4 L319 Fuel Cooler Radiator Unit 3.0 TDV6 LR031827

Land Rover Discovery 4 L319 Fuel Cooler Radiator Unit 3.0 TDV6 is a fuel system component from the Fuel filters group, designed to stabilize fuel temperature in the 3.0 TDV6 diesel engine. A properly selected fuel cooler supports consistent injection performance, improves engine refinement, and helps reduce the risk of fuel overheating under demanding operating conditions.

Specifications and technical data

• SKU: LR031827
• Mark: Land Rover
• Condition: Used
• OEM Part Number: LR031827
• Substitutable numbers: LR031827, 5H229N103BB, 5H22-9N103-BB
• Part type: Fuel Filter
• Category: Fuel Filters

Function and role of the fuel cooler in the Discovery 4 L319

The fuel cooler in the Land Rover Discovery 4 L319 with a 3.0 TDV6 engine is responsible for dissipating excess heat from the fuel returning from the injection system. This ensures that the fuel maintains stable physical parameters, which translates into:

• more consistent injection quantities under various loads,
• more efficient operation of precision fuel system components,
• reduced risk of cavitation and loss of high-pressure pump efficiency.

In combination with other components from the Fuel filters group, the cooler supports clean and stable operation of the entire system, which is particularly important in vehicles used for towing, off-road driving, or on long journeys.

Compatibility and selection by part numbers

The presented fuel cooler is intended for use in the Land Rover Discovery 4 L319 with a 3.0 TDV6 unit. It is always recommended to verify the selection of parts for this model using catalog numbers and the vehicle's VIN, which minimizes the risk of incorrect fitment and facilitates installation without the need for system modifications.

Thanks to the use of the original manufacturer's marking and the availability of interchangeable numbers, this component can be precisely assigned to a specific engine configuration and model year, which is especially important given the extensive range of Discovery 4 versions.

Condition, origin, and advantages of using a used part

The offered fuel cooler is an aftermarket part sourced from dismantling. Choosing an original used component is often a reasonable compromise between cost and quality, as you retain the factory geometry, mounting method, and compatibility with the vehicle's fuel and electrical systems.

Compared to cheap, low-quality replacements, an original Land Rover fuel cooler usually works better with the factory fuel system, reducing the risk of leaks, improper flow, or bleeding issues. This is particularly important in modern diesel engines, where operating tolerances are very tight.

Benefits of a properly functioning fuel cooler

A functional fuel cooler in the Discovery 4 L319 3.0 TDV6 contributes to the overall reliability and stability of the engine. Key benefits include:

• more stable combustion parameters under high engine load,
• lower thermal stress on injection system components,
• reduced risk of power drops associated with fuel overheating,
• better repeatability of injector performance across a wide temperature range.

For users who utilize their Discovery 4 in both city traffic and off-road, maintaining a functional fuel cooling system is a key preventive measure against costly repairs to the injection system.

Land Rover fuel filters – system expansion and service

If you are planning a comprehensive repair or upgrade of the fuel system area in your Land Rover and need other components from the same group, such as filter cartridges, filter housings, or supply lines, check out the available parts in the Land Rover fuel filters category.

Technical support and knowledge about the fuel system

To better understand the role of the fuel cooler in the context of the entire system, it is worth reviewing material discussing the construction and operation of modern fuel supply systems. Practical tips regarding diagnostics, component selection by OEM numbers, and regeneration principles can be found in the article "Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration".