Oil Cooling Pipe BMW E60 E61 520d M47N2 Gearbox Hose Radiator Cooler 7800488

BMW E60 E61 520d M47N2 Transmission Oil Line is an original part from the Oil Coolers and Lines category, designed for the lubrication system in the automatic transmission of BMW 5 Series E60/E61 models with the M47N2 engine. A used oil line allows for a technical, economical, and simultaneously safe replacement of a damaged section of the oil system, maintaining the gearbox's factory operating characteristics.

Specifications and technical data

• SKU: 7800488
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7800488
• Substitutable numbers: 17227800488, 7800488, 17227787461, 7787461, KZ
• Category: Engine Oil Coolers & Lines

Purpose and Function of the Transmission Oil Line

The oil line in the transmission is responsible for transporting working oil between the gearbox and the oil cooling system components. In the case of the M47N2 unit in the BMW 5 Series E60/E61, proper oil flow is crucial for:

• maintaining the stable operating temperature of the automatic transmission,
• ensuring adequate oil pressure in the circuit,
• reducing wear on friction elements and control valves,
• preserving the smoothness and refinement of gear changes.

Selecting a line dedicated to a specific engine and body version helps avoid assembly stresses, leaks, and problems with routing the oil line in the engine bay.

Benefits of Using an Original BMW Line

The original transmission oil line for the BMW 5 Series with the M47N2 engine has been designed for the specific geometry of the E60/E61 body and the factory oil cooling system. Thanks to this:

• the correct routing of the line is maintained, minimizing the risk of chafing and vibrations,
• connections to the oil cooler and transmission are matched to factory spigots,
• the lubrication system operates within the parameters intended by the manufacturer.

Choosing an original BMW part from the Oil Coolers and Lines category is the preferred solution for drivetrain repairs, especially in daily driven vehicles where predictability and consistent performance are important.

Condition, Verification, and Preparation for Installation

The transmission oil line is a used part, which in practice means a favorable compromise between repair cost and maintaining the original design. Before being offered, these types of components are routinely verified for:

• leak-tightness along the working section,
• condition of connection ends and threads,
• absence of mechanical damage that could affect the safety of the system's operation.

A line prepared in this way allows for efficient installation in a workshop specializing in BMW service, without the need for modifications or fitting universal replacements.

Importance of a Functional Transmission Oil Cooling System

In modern automatic transmissions, stable oil temperature is one of the key durability parameters. A functional oil line working in conjunction with the oil cooler reduces the risk of overheating, which translates to:

• less wear on clutch plates and hydraulic components,
• more consistent gear change points,
• lower risk of failure during intensive use or driving in high ambient temperatures.

If you want to better understand how temperature affects the entire cooling and lubrication system, it's worth checking out our guide: Summer Heat vs. Cooling System – Used Coolers and Fans as a Way to Economical Operation.

Selection and Other BMW Oil Coolers and Lines

When selecting a transmission oil line for the BMW 5 Series E60/E61 with the M47N2 engine, it is crucial to match it to the specific powertrain version and the installed oil cooling system. In case of system expansion or comprehensive repair, it is also worth considering replacing other components from the same group. If you are looking for other BMW oil coolers and lines, check out our dedicated offer: BMW oil coolers and lines.

Summary

The BMW E60 E61 520d M47N2 Transmission Oil Line is a practical solution for 5 Series owners who want to restore the proper operation of the automatic transmission's lubrication system while maintaining the factory design. An original, used part from the Oil Coolers and Lines category allows for a technically correct repair, reduces the risk of leaks, and supports stable transmission operation in daily use.