BMW 3 Series E90 E91 M57N2 Engine Charge Air Line Intercooler Pipe Hose 7793117

BMW 3 Series E90 E91 M57N2 Engine Charge Air Line Intercooler Pipe Hose is an original BMW intake system component designed to operate between the turbocharger and the intercooler in M57N2 engines. Thanks to its factory geometry and robust construction, it ensures stable charge air delivery, which helps maintain the proper operating parameters of the power unit. This is a practical solution for users looking for a proven air hose for the 3 Series E90/E91.

Specifications and technical data

• SKU: 7793117
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7793117
• Substitutable numbers: 7793117, 11617793117, 8506078, 11618506078, 7798440, 11617798440, 7798100
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The described air hose is a component connecting the turbocharger to the intercooler in the M57N2 diesel engine used in the BMW 3 Series E90 and E91. It is responsible for the tight and efficient laminar flow of compressed air, which influences:

• maintaining proper boost pressure across the entire rev range,
• stable operation of the boost control system,
• effective air cooling in the intercooler,
• reducing power drops resulting from leaks or deformation of the hose.

Due to its fitment for the specific M57N2 engine configuration, the hose maintains appropriate rigidity and flexibility in critical areas, which facilitates installation and reduces the risk of stress in the system.

Construction and fitment for BMW E90/E91

The hose belongs to the Hoses, pipes and tubes category, designed specifically for factory mounting points in the BMW engine bay. Properly shaped sections and connection diameters allow for:

• secure seating on the turbocharger and intercooler ports,
• compatibility with original clamps and brackets,
• maintaining the correct routing relative to other components in the engine bay.

Such fitment reduces the risk of rubbing against adjacent components and minimizes the possibility of micro-cracks resulting from improper hose positioning.

Benefits of using an original BMW hose

Using an original air hose in the boost system provides measurable operational benefits. Compared to aftermarket replacements of uncertain origin, the OEM component ensures:

• factory fitment for the specific M57N2 engine version,
• predictable behavior under load and at high temperatures,
• compatibility with the stock engine accessory configuration.

For users who want to keep the power unit's operating parameters as close to factory values as possible, choosing an original BMW air hose is a particularly advantageous solution.

Application in service and diagnostics

The hose is often replaced when symptoms of power loss, boost pressure-related errors, or visible oil traces on the outer surface of the hose appear. In service practice, it is used, among other things, for:

• eliminating leaks in the intake system,
• repairs after collisions in the front part of the vehicle,
• comprehensive maintenance of the turbocharger and intercooler.

By maintaining the original geometry, the hose facilitates the correct installation of other intake components, which shortens repair time and reduces the risk of subsequent operational problems.

Condition and origin of the component

The offered hose comes from dismantling and is a used part, which represents a reasonable compromise between cost and maintaining the original BMW specification. For many 3 Series E90/E91 users, this is a practical way to restore the efficiency of the boost system without the need to invest in a new component.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as intake hoses, vacuum hoses, or cooling system pipes, check the available parts in the BMW Hoses, pipes and tubes category.

For owners of BMW 3 and 5 Series who are also involved in vehicle electronics maintenance, practical tips on working with modules and the multimedia system may be useful – it is worth reading the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models, which describes the use of proven parts from dismantling.