BMW E90 E91 E92 325d Heat Exchanger Oil Cooling Pipe Inlet Outlet Hose 8509706

Description

BMW E90 E91 E92 325d Heat Exchanger Oil Cooling Pipe Inlet Outlet Hose is a component from the Oil coolers and lines group, designed for the lubrication system of the 3-series diesel engine. It is responsible for the precise routing of oil between components, which supports a stable operating temperature of the power unit and reduces the risk of overheating and oil pressure drops.

Specifications and technical data

• SKU: 8509706
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8509706
• Substitutable numbers: 17228509706, 8509706, 17228509707, 8509707, 1722779921717227799218, 7799217, 7799218, 17227799217
• Tire profile: 65535
• Category: Engine Oil Coolers & Lines

Purpose and function in the lubrication system

The oil line in BMW 3-series E90, E91, and E92 325d models operates in the immediate vicinity of the engine, where it is exposed to high temperatures and variable pressure. Its task is to provide a tight and stable supply of oil to the appropriate points of the system, which contributes to the protection of the turbocharger, oil cooler, and moving engine parts.

A properly selected oil pipe reduces pressure drops, minimizes the risk of leaks, and helps maintain uniform oil cooling, which translates into the durability of the power unit and predictable vehicle behavior under load.

Advantages of using an original BMW oil line

Choosing an oil line from the same design group as factory BMW components allows for maintaining compliance with the factory routing geometry and mounting points. Thanks to this:

• the correct oil flow path in the engine compartment is maintained,
• the risk of the line rubbing against other components is reduced,
• it is easier to maintain connection tightness with standard connectors,
• installation is predictable for the mechanic, without the need for modifications.

Such a fit is particularly important in diesel engines, where stable lubrication and oil cooling have a direct impact on the durability of the turbocharger and the crankshaft-piston system components.

Characteristics of the used component

The offered line belongs to the group of used OEM components, which means it comes from disassembly and retains the manufacturer’s original design. This type of part is a good solution for vehicle maintenance where compliance with factory solutions is important, while simultaneously optimizing repair costs.

Before installation, a standard workshop procedure is recommended: checking for leaks, the condition of the ends and sealing surfaces, as well as the correct positioning of the line in the engine compartment in accordance with BMW service documentation.

Technical support and part selection

The oil line in the lubrication system works with the oil cooler and other lines from the same group. When planning a repair, it is worth paying attention to:

• the consistency of the entire oil cooling system (lines, cooler, connectors),
• the absence of signs of corrosion or abrasion on adjacent elements,
• correct tightening torques for connectors in accordance with service documentation.

Thanks to this, replacing a single line can realistically improve engine safety and reduce the risk of subsequent leaks in other points of the installation.

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 lines, return pipes, or oil cooler supply lines, check the available parts in the BMW oil coolers and lines category.

More about the oil cooling system

A functional oil line is one of the elements of a wider engine cooling and lubrication system. The impact of the condition of the oil cooler, lines, and the entire circuit on the durability of the power unit has been discussed in more detail in an article dedicated to overheating and servicing cooling systems – details can be found in the post “Engine cooling system – overheating, repair, and used radiators”.