BMW 3 Series E90 E91 318d 320d M47N2 Charge Air Line Intercooler Hose 7790524

Description

BMW 3 Series E90 E91 318d 320d M47N2 Charge Air Line Intercooler Hose is an original intake system component, designed specifically for the M47N2 engine. Thanks to its factory-spec fitment, it ensures stable routing of compressed air between the turbocharger and the intercooler, which translates into predictable engine performance and correct boost characteristics. This is a practical solution for users who want to maintain the structural integrity of the intake system in their BMW 3 Series.

Specifications and technical data

• SKU: 7790524
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7805437
• Substitutable numbers: 11617805437, 7805437, 11617790524, 7790524, EM
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The charge air hose in BMW 3 Series E90/E91 318d and 320d models with the M47N2 engine is responsible for transporting compressed air from the turbocharger to the intercooler. A correctly selected component:

• maintains the tightness of the boost system under variable operating pressure,
• minimizes pressure drops in the section between the turbine and the air cooler,
• ensures stable engine operating conditions across the full load range.

Thanks to a design consistent with BMW factory standards, the hose works with stock mounts, clamps, and connectors, which facilitates installation and reduces the risk of leaks.

Construction and fitment for BMW 3 Series E90/E91

The hose has been designed for specific routing in the engine bay of the 3 Series E90/E91, taking into account the geometry of the M47N2 unit and the layout of the accessories. The properly selected shape and working diameter:

• ensure proper airflow to the intercooler,
• limit the risk of rubbing against adjacent components,
• facilitate service and potential disassembly during work on the intake system.

Its original BMW origin means that the hose is consistent with the vehicle’s factory specifications, which is important for maintaining stock engine performance parameters and compliance with service documentation.

Benefits of using an original charge air hose

Using a charge air hose dedicated to the BMW 3 Series E90/E91 318d/320d M47N2 allows you to limit typical problems associated with leaks and improper fitment of aftermarket replacements. In practice, this means:

• more predictable throttle response thanks to stable boost pressure,
• reduced risk of power loss resulting from air escaping before the intercooler,
• easier diagnostics of the intake system, as the component corresponds to factory design assumptions.

For users who care about the technical consistency of their car, it is also important that the hose comes from the BMW Lines, hoses and pipes group, which facilitates identification and selection within a single manufacturer standard.

Condition, origin, and economic aspect

The offered item is an original BMW part in used condition, which represents a reasonable compromise between cost and maintaining factory build quality. Compared to many low-budget replacements, an original intake hose usually fits better into the existing mounting system and maintains the correct flow geometry.

For owners of premium class cars, choosing a used OEM component is often a way to maintain a high level of reliability at controlled service costs. If you want to learn more about the arguments for this approach, it is worth reading the article Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026, which discusses the current realities of the parts market for BMW and other premium brands.

Complementary BMW intake system components

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 additional intake lines, vacuum hoses, or charge air cooling pipes, check out the available parts in the BMW Lines, hoses and pipes category.