BMW 1 2 Series F20 F21 F22 LCI Diesel B37 SCR Exhaust System Front Section Pipe

The SCR Front Exhaust Pipe for BMW 1 and 2 Series F20/F21/F22 LCI is an original part designed for diesel engines, specifically for Selective Catalytic Reduction configurations. With its factory geometry and precise fit for the BMW platform, it ensures stable exhaust gas flow and proper integration with other exhaust components. This solution is for users who expect compatibility with the factory system and wish to maintain the original engine performance parameters.

Specifications and technical data

• SKU: 8591413
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8591413
• Substitutable numbers: 18308591413, 8591413, AS
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: Other Exhaust & Emission Parts

Purpose and Function in the Exhaust System

The described front exhaust section is a component installed in the front area of the vehicle, within the exhaust path of a diesel engine equipped with an SCR system. Its functions include:

• directing exhaust gases from the engine towards further exhaust components,
• ensuring proper sealing and rigidity of connections,
• maintaining correct exhaust gas flow, which contributes to stable engine operation,
• integration with the SCR exhaust gas treatment system.

Thanks to its design, which aligns with BMW's solutions, this component preserves the original flow characteristics, which is crucial for both performance and the correct operation of engine control systems.

Compatibility with BMW 1 and 2 Series LCI

This pipe has been developed for the BMW 1 and 2 Series F20/F21/F22 generation after the body facelift (LCI), in diesel engine variants. This means it is adapted to:

• the chassis geometry characteristic of this generation,
• the location of mounting points in the front of the vehicle,
• the exhaust system designed for diesel engines with SCR systems.

Such precise fitting facilitates installation and reduces the risk of stress in the system, which is important for the durability of connections and interior acoustic comfort.

Technical Characteristics and Installation

This component is part of the group of parts installed in the front section of the vehicle, in close proximity to the engine. In practice, this means that appropriate precision is required during installation to:

• ensure axial alignment with other sections of the exhaust system,
• avoid leaks at the joints,
• maintain proper clearance from chassis components.

Due to its operation within the diesel engine's exhaust system, the pipe is designed to withstand the thermal and mechanical loads typical for this engine and to work in conjunction with the emission reduction system.

Component Condition and Practical Application

The offered component is used, making it an attractive alternative to new parts when cost optimization is a priority while maintaining original construction. It can be used for standard replacement of worn exhaust sections as well as for repairs resulting from mechanical damage in the front of the vehicle.

For workshops and individual users, this means the possibility of using a part of factory origin, without the need for adapting universal solutions, which contributes to a predictable final repair outcome.

If you are planning a comprehensive repair or upgrade of the exhaust system area in your BMW and need other components from the same group, such as additional pipe sections, mufflers, or mounts, check the available parts in the Other BMW category.

To compare solutions used in sports constructions and to better understand the differences in the design of powertrains and their accompanying components, it is worth reading the article discussing the specifics of high-performance models: Audi RS vs. Other Models – What Lies Under the Hood and Chassis?.