Mercedes W205 Exhaust Temperature Sensor A0009057115

The Mercedes W205 Exhaust Gas Temperature Sensor is a component from the Lambda Sensors and O2 Sensors group, responsible for precise measurement of exhaust gas temperature. Accurate exhaust gas parameter readings are crucial for the correct operation of the engine control unit, emissions control, and protection of components such as the diesel particulate filter or catalytic converter.

Specifications and technical data

• SKU: A0009057115
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009057115
• Substitutable numbers: A0009057115, A 000 905 71 15
• Category: Oxygen Sensors

Function and Application of the Exhaust Gas Temperature Sensor

The exhaust gas temperature sensor in the Mercedes W205 monitors operating conditions in the exhaust system and transmits signals to the control electronics. Stable, repeatable readings allow for:

• maintaining optimal combustion parameters,
• controlling the regeneration process of the diesel particulate filter,
• protecting exhaust system components from overheating,
• reducing emissions of harmful exhaust components.

Thanks to this, the engine control system operates in a predictable and safe manner, which translates to the smoothness of the powertrain and the durability of components.

Benefits of Using an Original Mercedes Sensor

An original exhaust gas temperature sensor designed for the Mercedes W205 is engineered for a specific engine architecture and control unit software. In practice, this means:

• appropriate temperature characteristics matched to injection and ignition maps,
• correct cable length and connector compatible with the factory wiring harness,
• consistency with the diagnostic logic of the OBD system.

Selecting a part by OEM number and interchangeable numbers minimizes the risk of compatibility issues, control unit errors, or the appearance of incorrect fault codes.

Condition, Verification, and Preparation for Installation

The presented exhaust gas temperature sensor is a used part, sourced from disassembly. Such components are often chosen as an economical alternative to new parts, while maintaining the original manufacturer's specifications. Before being offered for sale, the sensor is verified for marking and connector type compliance, which facilitates subsequent installation in the vehicle.

To correctly select the sensor for a specific Mercedes W205 engine version, it is advisable to use the OEM number or data from the manufacturer's catalog. This helps avoid situations where a part with different characteristics or a different mounting type is used.

Selecting Used Electronics and Sensors – Technical Support

For exhaust gas temperature sensors and other engine electronics components, matching by numbers and hardware-software compatibility is particularly important. These issues are discussed in more detail in the Global Parts guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?, where you will find information on selection by VIN/OEM, compatibility, and practical aspects of installation.

Expanding the Exhaust Measurement System in a Mercedes

If you are planning a comprehensive repair or upgrade of the exhaust system area in your Mercedes and need other parts from the same group, such as additional oxygen sensors, control probes, or diagnostic probes, check the available parts in the Mercedes Lambda Sensors and O2 Sensors category.

Additional information on the advantages of using used, original components in this brand of car is also provided in the article: Used Parts for Mercedes – Original Parts from Disassembly, which describes a practical approach to reducing service costs while maintaining high-quality components.