BMW 3 Series E90 E91 E92 M57N2 Turbo Charge Air Line Pipe 7798440

The BMW E90 E91 M57N2 Turbo Intercooler Hose is an original turbocharger and parts component designed for use in BMW 3 Series diesel engines with the M57N2 engine. This used intercooler hose provides a functional service solution for drivers who want to restore proper intake system operation without investing in a new component.

Specifications and technical data

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

Purpose and function in the supercharging system

The turbo intercooler pipe is responsible for the tight and stable routing of compressed air between the turbocharger, intercooler, and intake manifold in the M57N2 engine. A properly selected pipe ensures:

• appropriate boost pressure throughout the entire rev range,
• consistency of the turbocharger operation with the intake system,
• reducing power drops resulting from leaks or cracks in pipes,
• stable engine operating conditions under load and during dynamic acceleration.

In the event of wear or damage to the factory cable, using the original disassembled element allows the operating characteristics to be maintained in accordance with the manufacturer's specifications.

Characteristics of the original BMW element

This hose is from the BMW OE line, meaning it's factory-fitted to the supercharger system in E90 and E91 models with the M57N2 engine. This gives you:

• geometry consistent with the factory cable routing in the engine compartment,
• appropriately selected diameter and cross-section for air flow,
• compatibility with original bands, connectors and mounts,
• maintaining the standard operating parameters of the turbocharger and intercooler.

The original intercooler hose is designed to withstand the temperature, pressure and vibrations typical of BMW diesel engines, resulting in predictable performance over the long term.

Used condition and service benefits

The item is offered in used condition, which represents a reasonable compromise between repair costs and maintaining original build quality. In practice, this means:

• the possibility of economical replacement of a damaged cable in the charging system,
• maintaining the factory fit without the need for modifications,
• reducing the risk of compatibility problems typical of substitutes with imprecise dimensions.

A used intercooler hose is a particularly attractive solution for users who want to restore the efficiency of the supercharging system in cars used daily, without excessively increasing the repair budget.

Application in tuning and modifications

Many users of the M57N2 engine opt for minor software or intake system modifications. A functioning factory intercooler hose is essential for safely improving performance because:

• reduces the risk of leakage at higher boost pressure,
• ensures predictable airflow in the serial system,
• facilitates diagnostics – any problems do not result from the uncertain quality of the substitute.

If you are planning more extensive modifications to your vehicle using components from dismantling, it is worth reading the advice contained in the article "Tuning with used parts - how to gain performance without breaking the bank" , which discusses a practical approach to selecting used components.

Selection of other BMW intercooler hoses

If you are looking for other intercooler hoses for BMW from the same category of turbochargers and parts, check out the intercooler hoses for BMW available in our assortment to select the component best suited to your specific engine version and bodywork.

Summary

The BMW E90 E91 M57N2 Turbo Intercooler Hose is an original, used turbocharger component that restores proper airflow between the turbocharger and intercooler in the M57N2 engine. Choosing a factory-replaced hose is a technically sound solution for users who value compatibility, predictable system performance, and a reasonable cost for car repair or upgrades.