BMW E90 E91 E92 325d 330d 335d M57N2 Turbo Charge Air Line Pipe 7802122

The BMW E90 E91 E92 325d 330d 335d M57N2 Charge Air Hose is an original intake system component from the turbocharger and parts category, designed for BMW 3 Series diesel engines with the M57N2 unit. It ensures tight and stable compressed air routing between the turbocharger and subsequent system components, which has a direct impact on engine performance and refinement.

Specifications and technical data

• SKU: 8506078
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8506078
• Substitutable numbers: 11618506078 11617802122 4723094, 8506078 7802122, 11617798440 11617793117, 7798440 7793117, 11614723094
• Category: Turbos & Parts

Purpose and role in the charging system

The charge air duct in the M57N2 engine is responsible for transporting compressed air from the turbocharger to the downstream intake system components. In the BMW E90, E91, and E92 325d, 330d, and 335d models, the proper operation of this duct is crucial for:

• maintaining stable boost pressure,
• limiting power losses resulting from leaks,
• correct mixture composition and lower fuel consumption,
• turbocharger overload protection.

Using an OEM-grade component allows you to maintain factory airflow parameters, which is particularly important in the powerful M57N2 units used in the 325d, 330d and 335d versions.

Construction, fit and compatibility

The BMW charge air hose for the M57N2 engine is designed as part of a turbocharger system with specific geometry tailored to the engine bay of the 3 Series E90, E91, and E92. The appropriately selected shape and diameter ensure:

• stable mounting at factory points,
• proper cable routing while maintaining clearances in relation to other components,
• compatibility with original intake system clamps and connectors.

As a turbocharger and parts item, the hose works with the factory turbocharger and other intake components, making it easy to plug-and-play in dedicated models.

Product characteristics and condition

The hose offered is in used condition, meaning it has been disassembled and previously operated in a vehicle. This OEM part is often chosen by workshops and informed users as a reasonable compromise between cost and maintaining factory specifications. Used charge air hose:

• enables economical repair of the charging system,
• ensures compatibility with factory mounts and accessories,
• is an attractive alternative to substitutes with uncertain parameters.

Thanks to this, it will work well both in standard use and in cars used intensively, provided that the system is properly installed and leak-tight.

Workshop use and assembly benefits

Installing the charge air hose on the M57N2 engine is a typical service operation performed at:

• finding a leak in the charging system,
• mechanical damage to the cable (cracks, abrasions),
• diagnosing power drops or errors related to boost pressure.

Replacing it with an original BMW component restores proper airflow and reduces the risk of secondary turbocharger failures. For workshops, the ability to verify compatibility using the OEM part number and available interchangeable part numbers is also crucial, making it easier to select the right component for a specific engine version.

If you need other BMW-specific charge air hoses, check out our BMW charge air hoses category to find the perfect fit for your model.

Safe selection of used parts and additional knowledge

When purchasing a used charge air hose, it's important to check for compatibility with the OEM part number and interchangeability list, as well as the requirements of the specific M57N2 engine version. Part number selection procedures and practical tips for checking the component's condition before installation can be helpful.

For more information on how to choose used OEM components wisely, please refer to the guide to safely purchasing used car parts online , which provides a step-by-step component selection strategy for drivers and workshops.

If you are also interested in the topic of selecting and servicing components that influence driving comfort, read the article Air conditioning and heating – selection of parts and maintenance for year-round comfort , which describes a practical approach to the operation of auxiliary systems in modern cars.