Oil Cooling Pipe BMW E90 E91 LCI E92 E93 F01 F02 N57 Hose Radiator 7809802

BMW E90 E92 F01 LCI N57 Transmission Oil Line is an original part from the Oil Coolers & Lines category, designed for the automatic transmission lubrication system in selected BMW models with the N57 engine. A used oil line allows for a technical yet economical repair of the system, maintaining factory oil routing and proper gearbox cooling. This is a solution for users who expect a proven OEM part and want to maintain correct gearbox operating parameters.

Specifications and technical data

• SKU: 8509432-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8509432
• Substitutable numbers: 17228509432, 8509432, 17227809802, 8509436, KZ, 51357129736, 7129736
• Category: Engine Oil Coolers & Lines

Purpose and Function of the Transmission Oil Line

The transmission oil line in BMW models with the N57 engine is responsible for transporting oil between the gearbox and the cooling system components. Proper flow of the working medium is crucial for:

• maintaining the stable operating temperature of the automatic transmission,
• protection against overheating during city and highway driving,
• reducing wear of the gearbox's internal components.

Selecting a line dedicated to the specific BMW E90, E92, and F01 LCI generations ensures the preservation of factory oil routing geometry and compatibility with original mountings.

Benefits of Using an Original BMW Line

Using an original transmission oil line to replace a worn or leaking component brings tangible operational benefits. The most important include:

• Factory fitment for the cooling system and gearbox in BMW vehicles with the N57 engine.
• Appropriately selected line diameter and construction, supporting stable oil pressure.
• The ability to restore correct system operation without altering the installation's structure.
• A cost-effective solution compared to purchasing a new OEM part.

For workshops specializing in the BMW brand, such a line provides a practical basis for professional repair of the gearbox oil cooling system.

Condition, Verification, and Service Application

The part is a used component intended for reinstallation after standard workshop verification. In practice, this means it can be used for both typical line replacement and larger service works related to:

• resolving gearbox oil leaks,
• overhauling or replacing the oil cooler,
• upgrading the transmission cooling system in heavily used vehicles.

Choosing a used oil line is particularly attractive where a combination of technical correctness and a reasonable service budget is important.

BMW Oil Coolers & Lines – Part Selection

If you are looking for other parts from the Oil Coolers & Lines category dedicated to this brand, check out our offer for BMW oil coolers and lines. This will allow you to easily assemble the entire system – from lines and coolers to other components of the oil system.

Technical Support and Cooling System Knowledge

When working with the gearbox oil cooling system, it is advisable to pay attention to the overall condition of the vehicle's entire cooling system, especially during periods of high temperatures. More practical information on the impact of heat on the cooling system and the cost-effectiveness of using used components can be found in the guide “Summer Heat vs. Cooling System: Used Coolers and Fans Guarantee Savings”. This is a useful addition to your knowledge when planning comprehensive car servicing.