BMW 3 Series E90 E91 E92 E93 LCI N47N Hose Radiator Transmission Oil Cooler

BMW E90 E92 Transmission Cooling Hose is a component from the Hoses, Pipes & Tubes category, designed for the automatic transmission cooling system in BMW 3 Series E90/E92 vehicles. It ensures a stable flow of coolant between the transmission and the cooling system, supporting safe operating temperatures for the gearbox and improving its operational smoothness. This is a solution for users who want to maintain the factory performance characteristics of their transmission using an original BMW component.

Specifications and technical data

• SKU: 8511721
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8511721
• Substitutable numbers: 17128511721, 8511721, 17127811126, 7811126
• Category: Hoses, Lines & Pipes

Function and Application of the BMW Transmission Cooling Hose

The transmission cooling hose in BMW E90/E92 models is responsible for transporting the cooling medium between the transmission and the heat exchanger. A correctly selected component ensures:

• stabilization of transmission oil temperature under typical operating conditions,
• reduced risk of transmission overheating under load,
• maintenance of gear shifting parameters in line with manufacturer specifications.

Thanks to its original geometry and connections, the hose can be installed in place of the factory component without requiring any modifications to the system.

Construction and Fitment within the "Hoses, Pipes & Tubes" Category

This item belongs to the Hoses, Pipes & Tubes group, meaning it is designed for resistance to pressure, temperature, and contact with coolant and transmission oil. The hose's construction is adapted for routing within the BMW E90/E92 engine bay, considering:

• appropriate shape for easy routing in factory mounting points,
• ends compatible with original cooling system spigots,
• stiffness and flexibility selected for the thermal conditions around the transmission.

Such a fitment minimizes stress on the system and reduces the risk of leaks in the long term.

Benefits of Using an Original BMW Hose

Replacing a worn or leaking transmission cooling hose with an original BMW component restores the proper functioning of the transmission cooling system. Key benefits include:

• Factory Fitment – the hose is designed for the specific BMW E90/E92 platform, facilitating installation and ensuring compatibility with other components.
• Cooling System Integration – maintaining the original diameter and flow cross-section supports stable transmission cooling parameters.
• Operational Safety – a functional hose reduces the risk of coolant leaks and a drop in transmission cooling efficiency.

For users who want to proactively manage their BMW's technical condition, replacing the transmission cooling hose is an important aspect of preventative maintenance.

Component Condition and Installation Aspects

The offered hose is an original BMW component, which helps maintain the integrity of the entire drivetrain. During installation, it is recommended to:

• verify the condition of the connection sockets in the transmission and heat exchanger,
• inspect other hoses within the transmission cooling system,
• properly bleed the system after completing the service work.

This approach allows for the full utilization of the hose's potential and maintains stable transmission operating conditions in daily use.

Other BMW Hoses, Pipes & Tubes and Technical Knowledge

If you are looking for other BMW Hoses, Pipes & Tubes for your car, check out our dedicated offer: BMW hoses, pipes & tubes. You will find a wide selection of cooling, fuel, and control system components tailored for various BMW models.

More practical information on selecting original components and how used parts can support the longevity of your car can be found in the article: BMW – Sporty Performance and Precision. How Used Original Parts Extend the Life of the Bavarian Icon?