BMW E90 E91 E92 LCI F01 F07 F10 F11 N57 Diesel Exhaust Manifold EGR Line Pipe

The BMW E90 E91 F10 F11 N57 EGR Exhaust Pipe is an exhaust gas recirculation system component designed for BMW diesel engines. It is responsible for precisely channeling exhaust gases between the EGR valve and other system components. Thanks to its factory geometry and compatibility with the N57 unit, this pipe ensures stable diesel engine operation and helps maintain correct emission parameters. It is a practical solution for users looking to restore proper EGR system function without altering the vehicle's structure.

Specifications and technical data

• SKU: 7823991
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7823991
• Substitutable numbers: 11717823991, 7823991, 11717805448, 7805448
• Fuel type: Diesel
• Category: Exhaust Pipes & Tips

Purpose and Function in the Exhaust System

The offered EGR exhaust pipe belongs to the Exhaust Pipes and Tips group and is compatible with Diesel engines in BMW E90, E91, F10, and F11 models equipped with the N57 unit. Its function is to controllably guide exhaust gases within the recirculation loop, which contributes to the stability of the engine's operation, smooth idling, and reduction of nitrogen oxide emissions.

A properly selected EGR pipe allows for maintaining:

• correct exhaust gas flow in the recirculation loop,
• coherence between the exhaust system operation and the engine control unit maps,
• appropriate temperature conditions in the EGR area.

Benefits of Using an Original EGR Exhaust Pipe

In modern diesel engines, such as the N57, the precision of exhaust system components directly impacts the engine's durability. Using an EGR pipe from BMW ensures:

• factory fit to engine geometry – no need for modifications or adapter adjustments,
• compatibility with the original exhaust gas recirculation system,
• preservation of the manufacturer's designed flow parameters.

For the user, this translates to a lower risk of leaks, more stable engine operation, and fewer diagnostic errors related to the EGR system.

Item Condition and Service Application

The EGR pipe is offered as a used part, making it a sensible choice for servicing diesel vehicles where both functionality and repair economy are important. This type of component is particularly useful for:

• resolving leaks at EGR connection points,
• restoring proper exhaust gas circulation after mechanical pipe failure,
• comprehensive exhaust system servicing in N57 engines.

Thanks to its original construction, installation is similar to the factory process, which simplifies workshop work and reduces vehicle downtime.

Diagnostic Support and Diesel Engine Operation

A functional EGR pipe is important not only for the exhaust system itself but also for protecting the diesel engine's ancillaries. Improper exhaust gas flow can affect the operating conditions of injectors, turbochargers, and particulate filters. To better understand the relationship between the condition of ancillaries and the health of the diesel engine, it is worth reading the article Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails, which discusses the symptoms and consequences of improper injector operation in diesel engines.

Expanding BMW Exhaust System Service

If you are planning a comprehensive repair or upgrade of the exhaust system area in your BMW and need other parts from the same group, such as additional exhaust pipe sections, connectors, or exhaust tips, check the available parts in the BMW Exhaust Pipes and Tips category.