Coolant Hose BMW G30 G31 G32 GT Diesel Transmission Oil Cooler Hose 8592808

Coolant Hose BMW G30 G31 G32 GT Diesel Transmission Oil Cooler Hose is a specialized cooling system component designed for BMW diesel engine models. It is responsible for the precise routing of coolant between the transmission oil cooler and other components, supporting stable operating temperatures for the drivetrain. As such, it serves as an important link in protecting the transmission and the entire powertrain in G-series BMW vehicles.

Specifications and technical data

• SKU: 8592808
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8592808
• Substitutable numbers: 8592808, 17128592808
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and function in the cooling system

The presented hose belongs to the Cooling system hoses and lines group and is designed to work with the transmission oil cooler in BMW diesel vehicles. Its task is to ensure controlled coolant flow, which helps maintain stable transmission oil temperature during driving in various load conditions.

In practice, this means:

• efficient dissipation of excess heat from the transmission oil,
• reduced risk of transmission overheating during dynamic or highway driving,
• support for the durability of internal transmission components thanks to stable thermal conditions.

Benefits of using an original BMW hose

Choosing an original BMW cooling system hose translates into a secure fit to the engine bay geometry and compatibility with factory connectors and clamps. The properly shaped cross-section and length of the hose reduce stress, minimize the risk of abrasion, and facilitate correct routing in the engine bay.

Key advantages include:

• maintaining factory coolant flow characteristics,
• reduction of potential leaks thanks to the correct end profile,
• consistency with other cooling system components and the transmission oil cooler.

Product characteristics and application in Diesel engines

The hose has been developed for Diesel units, where the thermal load on the transmission and cooling system is particularly significant at high torque levels. A properly functioning water line supports:

• stable operation of the automatic transmission during long-term driving cycles,
• maintenance of proper transmission oil temperature when towing or driving under load,
• limitation of cooling system performance drops in high ambient temperature conditions.

Therefore, replacing a worn or leaking hose with a functional component is an essential stage of cooling system maintenance in modern G-series BMWs.

Condition, installation, and selection by part numbers

The item is offered in used condition, which allows for an economical replacement while maintaining the manufacturer's original specifications. Before installation, a standard visual inspection of the hose and seals is recommended, as well as verifying correct positioning relative to other components in the engine bay.

Selecting the hose for a specific vehicle should be based on part numbers and BMW catalog data, which facilitates matching the correct body version and drivetrain configuration. This approach minimizes the risk of error and speeds up the service process in a workshop or during DIY replacement.

Technical support and additional materials

If you are planning a comprehensive repair or upgrade of your BMW's engine area and need other elements from the same group, such as water lines, flexible radiator hoses, or coolant connectors, check the available parts in the BMW cooling system hoses and lines category.

To better understand the impact of a functional cooling system on the durability of the powertrain and transmission, it is worth reading the guide on our blog: Engine cooling system – overheating, repair, and used radiators. You will find practical tips on diagnosing overheating and the importance of the oil cooler in modern BMW designs.