BMW 3 Series E46 M47N Oil Cooling Pipe Inlet Outlet Hose 7788599

BMW 3 Series E46 M47N Oil Cooling Pipe Inlet Outlet Hose is an original lubrication system component, designed specifically for the M47N engine unit. As a part from the Oil coolers and hoses group, it ensures stable oil flow between the engine and the cooler, supporting safe operating temperatures and the durability of the powertrain. This used OEM component is a sensible choice for drivers looking for a technically matched solution at an attractive price.

Specifications and technical data

• SKU: 7788599
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7788599
• Substitutable numbers: 7788599, 17227788599, 2249782, 17222249782, 2249783, 17222249783, EM
• Category: Engine Oil Coolers & Lines

Purpose and technical function

The oil hose is designed to handle the oil circulation in the M47N engine of the BMW 3 Series E46 model, acting as an inlet and outlet channel for the medium to the oil cooler. It is responsible for maintaining proper flow and system tightness, which directly affects oil temperature, pressure stability, and the protection of mating components in the engine.

Thanks to a design compliant with factory BMW standards, the hose maintains the correct routing geometry, minimizes the risk of abrasion and unwanted stress, and facilitates installation in the original mounting points.

Benefits of using an original oil hose

Using an original hose from the Oil coolers and hoses group in the M47N engine allows you to maintain the operating parameters specified by the manufacturer. In practice, this means:

• reliable fitment to the oil cooling system in the BMW 3 Series E46,
• maintenance of the correct direction and cross-section of oil flow,
• reduction of the risk of leaks at critical connection points,
• consistency with the factory mounting and hose routing system.

A used OEM element also provides the opportunity to maintain the vehicle's original specification without the need for replacements with uncertain parameters. This is particularly important in diesel engines, where stable oil cooling affects the refinement and longevity of the unit.

Selection and compatibility with the oil cooling system

The hose has been developed to work with the factory oil cooler in the BMW 3 Series E46 with the M47N engine, which is why its shape, connection diameters, and length are adapted to the original layout of components in the engine bay. The presence of dedicated part numbers and interchangeable numbers facilitates verification of compatibility with a specific vehicle configuration and helps avoid installation problems.

For users planning to service the lubrication system, replacing the oil hose with an original component is a reasonable preventive solution, especially when symptoms such as sweating at the joints, traces of oil on the hose, or signs of overheating in the vicinity of the oil cooler are present.

Used condition and practical aspects

The offered hose comes from dismantling, which allows you to combine factory BMW quality with a more favorable purchase cost. The used OEM element retains its original geometry and connection type, which facilitates installation without modifications and shortens work time in the workshop. This is a practical solution for BMW 3 Series E46 owners who want to keep their car in good operating condition while controlling repair budgets.

Additional help in making a decision between a used part and other solutions can be found in the guide on our blog – more information can be found in the article Refurbished or used original – which part to choose for repairs?.

Oil cooling system and operation in high temperatures

A functional oil hose is of particular importance in the summer, when the thermal load on the engine increases. Stable oil flow through the cooler helps reduce the risk of overheating, loss of oil viscosity, and accelerated wear of mating components. The proper condition of hoses, the cooler, and fans is an important element of preventive maintenance, especially in intensively used BMW 3 Series E46 units.

If you want to better understand the impact of high temperatures on the cooling and lubrication system, check out the guide Summer heat vs. cooling system: used coolers and fans as a guarantee of savings, where you will find practical tips regarding the operation and selection of used components.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as oil hoses, oil coolers, or additional connectors, check out the available parts in the BMW Oil coolers and hoses category.