BMW 3 Series E46 M47N Charge Air Line Hose Cooler Intake 7791393

BMW 3 Series E46 M47N Charge Air Line Hose Cooler Intake is an original turbocharging system component responsible for efficiently routing compressed air through the intercooler. Thanks to its factory geometry and precise fitment for the specific engine version, it ensures stable operating parameters for the intercooler system and proper integration with other intake components.

Specifications and technical data

• SKU: 7791393
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7791393
• Substitutable numbers: 11617799397, 7799397, 11617791393, 7791393, EM
• Category: Coolant Hoses

Purpose and function in the intercooler system

The offered hose belongs to the Cooling system pipes and hoses category and is a part of the airflow path between the turbocharger, intercooler, and intake manifold in the BMW 3 Series E46 with the M47N engine. It is responsible for airtight, controlled routing of compressed air, which directly impacts:

• maintaining proper boost pressure across the entire RPM range,
• efficient cooling of air after it leaves the turbocharger,
• stable operation of the diesel engine under load,
• reducing power drops resulting from leaks or deformation of the hose.

Construction and fitment for BMW 3 Series E46 M47N

The hose was designed by BMW as an original component, which means it retains factory diameters, shape, and mounting points. As a result:

• it fits standard intercooler ports and the intake manifold,
• it maintains proper flow geometry, minimizing turbulence and pressure losses,
• it ensures compatibility with factory clamps and mounting brackets in the engine bay.

Such fitment reduces the risk of stress on connections and facilitates installation without the need for modifications or additional adapters.

Benefits of using an original intake hose

Using an original intake hose in a BMW 3 Series E46 with the M47N engine allows for restoring the proper operation of the turbocharging system after a failure, crack, or delamination of the old part. In practice, this translates into:

• more predictable engine response to throttle input thanks to stable boost pressure,
• reduced risk of overboost or underboost resulting from leaks,
• maintaining factory combustion parameters and engine performance,
• reducing noise and air whistling in the engine bay.

This component is particularly important in vehicles used in city and highway conditions, where the turbocharging system operates under variable loads and high temperatures.

Condition, origin, and service application

The offered hose comes from dismantling and is a used original BMW component. This type of part is frequently chosen by workshops and individual users as a service solution that allows for maintaining factory quality at a reasonable repair cost. It is suitable both for the typical replacement of a worn hose and for comprehensive maintenance of the intake system in M47N engines.

To better understand the impact of temperature and load on intercooler system components, it is worth checking out the guide describing operation in high temperatures: Summer heat vs. cooling system – used radiators and fans as a way for cost-effective operation.

System expansion – other BMW cooling system pipes and hoses

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 additional intake pipes, flexible cooling hoses, or connectors between the radiator and the engine, check the available parts in the BMW cooling system pipes and hoses category.