BMW E90 LCI F10 F11 325d 330d 525d 530d N57 Pipe Intake Manifold AGR 7807481

Visual condition of the part 

The product shows signs of use visible in the photos. 

BMW E90 LCI F10 F11 325d 330d 525d 530d N57 Pipe Intake Manifold AGR is an exhaust gas recirculation system component designed for N57 diesel engines in BMW 3 Series E90 LCI and 5 Series F10/F11 models. As part of the Intake manifolds group, this pipe is responsible for the precise delivery of exhaust gases to the intake system, which is crucial for stable engine operation and emission control. Using an OEM component allows for a technically correct replacement of a worn-out AGR installation section without interfering with the engine unit's design.

Specifications and technical data

• SKU: 7807481-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7807481
• Substitutable numbers: 7807481, 11617807481
• Category: Intake Manifolds

Purpose and function in the intake system

The AGR pipe in the N57 engine is responsible for the controlled flow of exhaust gases from the exhaust system to the intake, where they mix with fresh air drawn in by the intake manifold. A properly selected and sealed component in this section influences:

• stable pressure in the intake system under various engine loads,
• proper operation of the exhaust gas recirculation valve,
• maintenance of correct combustion parameters and emission levels,
• reduction of the risk of engine control unit errors related to exhaust gas flow.

By maintaining the factory geometry and diameter of the AGR pipe, the N57 unit can operate under conditions close to the original, which promotes predictable torque characteristics and proper cooperation with the control electronics.

Benefits of using an original BMW AGR pipe

Using an original AGR pipe from the Intake manifolds group ensures a perfect fit with factory mounting points and compatibility with other intake and exhaust system components. In practice, this means:

• no need for modifications to mounts or the shape of the pipe,
• maintaining proper sealing of connections with the manifold and AGR valve,
• consistency with the factory exhaust gas recirculation control strategy in the N57 engine.

The used OEM element is a good solution when the existing pipe has cracked, corroded, or suffered thermal deformation, and the priority is to restore proper system operation while maintaining reasonable service costs.

Selection and compatibility within the BMW range

BMW E90 LCI F10 F11 325d 330d 525d 530d N57 Pipe Intake Manifold AGR has been designed with the specific architecture of the N57 unit and the layout in the engine bay of the 3 and 5 Series models in mind. As a result, the following are maintained:

• compliance with factory routing of pipes in the engine bay,
• proper distance from components exposed to high temperatures,
• correct cooperation with the intake manifold and engine accessories.

When selecting an AGR pipe, it is worth paying attention to compatibility with the specific N57 engine version and body configuration to avoid assembly problems and incorrect positioning of the pipe relative to other components.

Condition, assembly, and service aspects

The item is offered as a used BMW OEM component, which allows for maintaining factory build quality and pipe geometry. Replacing the AGR pipe is recommended in case of leaks, visible mechanical damage, or exhaust gas flow problems within the recirculation system.

During assembly, it is worth paying attention to:

• checking the sealing surfaces on the intake manifold and AGR valve side,
• proper tightening of mounts according to service procedures,
• checking that the pipe is not under tension or twisted after installation.

Intake system expansion and technical knowledge

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 pipe sections, connecting elements, or sections cooperating with exhaust gas recirculation, check the available parts in the BMW Intake manifolds category.

For users interested in a broader context of how the intake system works and its connection to exhaust gas flow, information on the impact of manifolds and associated elements on engine characteristics may be useful – you can find them in the article Performance exhaust system: used manifolds and sports catalytic converters on the road, which discusses practical aspects of selecting used components in premium brand vehicles.