Air Charge Line BMW E90 E91 LCI N57 Diesel Intercooler Manifold Hose 7800143

Visual condition of the part

The product shows signs of use visible in the photos.

Air Charge Line BMW E90 E91 LCI N57 Diesel Intercooler Manifold Hose is an original boost system component designed for BMW 3 Series diesel engines after the facelift. As part of the Lines, Hoses and Pipes group, it is responsible for the stable and airtight routing of compressed air between the turbocharger and the intercooler. Using this OEM component allows you to maintain the factory performance characteristics of the N57 engine at a reasonable repair cost.

Specifications and technical data

• SKU: 7800143-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7800143
• Substitutable numbers: 11617800143, 7800143, KD
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Function and importance of the intercooler hose in a Diesel engine

In a turbocharged Diesel engine, the intercooler hose is responsible for transporting cooled compressed air from the air cooler to the intake manifold. A properly selected pipe ensures:

• proper airtightness of the boost system,
• stable boost pressure across the entire rev range,
• reduction of power loss resulting from leaks or hose deformation,
• correct operation with the factory N57 engine management system.

By maintaining the original geometry and cross-sectional diameter, the intercooler hose helps maintain proper airflow, which translates into smooth engine operation and predictable throttle response.

Why choose an original BMW hose

The original BMW intercooler hose has been designed specifically for the E90/E91 LCI intake system with the N57 engine. In practice, this means:

• a secure fit to factory mounts and brackets in the engine bay,
• compatibility with original connectors, clamps, and ports,
• material selected for the typical thermal and pressure loads of this unit.

Using a used OEM component allows you to maintain the factory flow characteristics without the need for modifications to the installation. This is a particularly beneficial solution for maintenance repairs when you are looking for a technically correct yet economical service.

Condition, fitment, and application in BMW E90/E91 LCI

The offered intercooler pipe comes from a BMW vehicle and is classified as a used part. This type of component is a popular choice for intake system repairs when the factory hose has cracked, delaminated, or lost its seal at the connections. Using an original part from the same model generation minimizes the risk of installation problems and incorrect hose positioning relative to other components in the engine bay.

The hose is designed for N57 diesel units in E90/E91 bodies after the facelift, which allows for consistency with the factory boost and air cooling system configuration.

Benefits of choosing a used original for premium cars

For premium cars such as BMW, using a used OEM element from the Lines, Hoses and Pipes group often represents a reasonable compromise between cost and quality. You receive a part designed for a specific model and engine, without the need to adapt aftermarket replacements of uncertain specifications. This is particularly important in the boost system, where leaks can lead to power loss, increased fuel consumption, or engine control unit errors.

If you would like to learn more about the arguments for choosing used OEM components in premium cars, it is worth reading the article: Crisis in the new parts market? Why used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend in 2026.

Expanding the intake system in BMW – related 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 flexible intake sections, vacuum lines, or breather pipes, check out the available parts in the BMW Lines, Hoses and Pipes category.