Mercedes W204 C204 A207 W212 S212 EGR Exhaust Gas Line Pipe Left N/S A2721401908

The Left EGR Exhaust Pipe for Mercedes W204 / C204 / A207 / W212 / S212 is an original exhaust gas recirculation component, designed for left-side installation in selected Mercedes models. Thanks to its factory geometry and precise fit for the specific platform, it ensures stable exhaust gas flow and proper cooperation with the EGR valve and exhaust manifolds.

Specifications and technical data

• SKU: A2721401908
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2721401908
• Substitutable numbers: A2721401908, A 272 140 19 08
• Location on the vehicle: Left
• Category: EGR Parts & Valves

Purpose and Function in the EGR System

The EGR exhaust pipe is responsible for the controlled delivery of a portion of exhaust gases from the exhaust system to the intake system, which helps reduce nitrogen oxide emissions and maintain engine operating parameters in accordance with the manufacturer's specifications. This component utilizes original Mercedes design solutions, promoting stable EGR system operation across a wide range of loads.

Its placement on the left side of the vehicle is important for both proper routing of the pipe and compatibility with engine accessories and heat shields. The correct fit of this part is crucial for:

• maintaining the seal of connections in the EGR system,
• ensuring the correct routing of the pipe relative to other components,
• minimizing thermal and mechanical stresses.

Compatibility with Mercedes Models

The offered EGR exhaust pipe is designed to work with the powertrains used in the Mercedes W204, C204, A207, W212, and S212 series. This means its geometry, mounting points, and connection diameters are adapted to the factory exhaust and intake systems of these generations.

As a result, this part can be used for both standard replacement of a worn-out component and for repairs related to EGR system leaks, power loss, or the appearance of engine control unit errors associated with exhaust gas recirculation.

Technical Category and Role in Service

This item belongs to the EGR Valves and Parts category, which includes components responsible for controlling exhaust gas flow within the recirculation system. In workshop practice, the EGR exhaust pipe is often replaced concurrently with the EGR valve, gaskets, and other elements in this section to restore full system functionality and reduce the risk of repeated disassembly.

Using an original component from this group helps maintain factory flow parameters, which is important for correct engine control unit operation, stable idle speed, and proper response to load.

Characteristics of a Used Component

The offered EGR exhaust pipe is a used part, sourced from disassembly. Such components are often chosen by professional workshops and informed users when a combination of original manufacturing quality and reasonable repair cost is desired. For EGR pipes, it is particularly important to maintain the correct geometry and rigidity of the pipe, which facilitates proper installation and operation.

Before installation, the standard workshop procedure is recommended: inspect the connection surfaces, verify the condition of the mountings, and use new gaskets in accordance with the vehicle manufacturer's recommendations. This approach maximizes the potential of the part and minimizes the risk of future leaks.

Support for EGR System Selection and Expansion

If you are planning a comprehensive repair or upgrade of the exhaust gas recirculation system in your Mercedes and need other parts from the same group, such as exhaust pipes, EGR valves, or connecting pipes, check the available parts in the Mercedes EGR Valves and Parts category.

For users interested in the broader context of technological development within the brand, we recommend an article describing successive generations of flagship models, powertrain innovations, and the selection of service components: The Evolution of the Mercedes S-Class: From W140 to W222 – Innovations, Model Differences, and Mercedes Auto Parts Over the Years. This provides practical knowledge for planning long-term operation and servicing of Mercedes vehicles.