Range Rover L405 Gearbox Oil Cooler Radiator Automatic 4.4 X6003001

Range Rover L405 Gearbox Oil Cooler Radiator Automatic 4.4 is a specialized drivetrain component designed to work with diesel engines and automatic transmissions. It is responsible for stabilizing transmission oil temperature, which translates into safe gearbox operation and reduces the risk of overheating during intensive use. This is a solution for users who expect consistency with the factory Range Rover design and want to maintain proper drivetrain performance parameters.

Specifications and technical data

• SKU: LR036354
• Mark: Range Rover
• Condition: Used
• OEM Part Number: X6003001
• Substitutable numbers: LR036354, AW837A095AA, AW83-7A095-AA
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Oil Coolers & Lines

Purpose and function in the drivetrain

The presented oil cooler is a component from the Oil coolers and lines group, designed to work with the automatic transmission in a Range Rover with a diesel engine. Its task is to dissipate excess heat from the transmission oil, which:

• stabilizes the operating temperature of the automatic transmission across a wide range of loads,
• reduces transmission oil degradation during off-road driving and in traffic jams,
• supports smooth gear shifting at high ambient temperatures,
• reduces the risk of failure resulting from system overheating.

Thanks to its fitment for the specific Range Rover drivetrain configuration, the cooler works with the factory oil line system and the front-end structure of the vehicle, which facilitates installation and subsequent maintenance.

Compatibility with diesel engine and automatic transmission

The cooler has been prepared for operation in a vehicle with a diesel engine, where thermal loads on the drivetrain are particularly noticeable when towing, driving with a high curb weight, and off-road. Integration with the automatic transmission allows for the maintenance of stable transmission oil parameters, which is important for:

• the service life of planetary gears and multi-plate clutches,
• the precision of gear engagement in comfort and off-road modes,
• maintaining drivetrain performance characteristics in line with the manufacturer's specifications.

Such compatibility is particularly important in Range Rover class vehicles, where predictable drivetrain response is expected both on and off the asphalt.

Characteristics of the used component

The offered gearbox oil cooler is a used component, which allows for economical repair while maintaining the original design. In practice, this means the possibility of:

• restoring the efficiency of the oil cooling system after mechanical damage or leaks,
• preserving the factory routing of lines and mounting points,
• reducing service costs while maintaining compliance with the manufacturer's solution.

For workshops and individual users, this is a beneficial solution in situations where the priority is a quick replacement of the component while maintaining the correct operating parameters of the automatic transmission.

Benefits of using a dedicated oil cooler

Using the correct oil cooler in a Range Rover L405 translates into a number of practical operational benefits:

• Stable transmission oil temperature – lower risk of overheating when driving under heavy load or in high ambient temperatures.
• Support for smooth gear shifting – maintaining predictable automatic transmission operation during dynamic acceleration and frequent changes in driving modes.
• Reduction of costly repairs – proper oil cooling reduces the thermal load on internal gearbox components.
• Consistency with the factory design – no need to adapt universal solutions or modify the installation.

This is particularly important in premium class vehicles, where the drivetrain operates in diverse conditions and requires the maintenance of an appropriate thermal reserve.

Technical support and parts selection

When selecting a gearbox oil cooler for a specific Range Rover version, it is worth paying attention to compatibility with the fuel type and transmission type to avoid installation and operational problems. Additionally, information about the OEM part number and available replacement numbers can be helpful, which facilitate compatibility verification in service catalogs and parts selection systems.

If you are planning a comprehensive repair or upgrade of the oil cooling system area in your Range Rover and need other components from the same group, such as additional radiators, oil lines, or mounting elements, check the available parts in the Range Rover oil coolers and lines category.

To better understand the impact of temperature on the cooling system and the possibilities of using used components to optimize service costs, read the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings, which discusses the practical aspects of operating and selecting cooling components.