Mercedes C118 Exhaust Gas Temperature Sensor Probe Module A0009050112

Mercedes C118 Exhaust Gas Temperature Sensor A0009050112 is an original part from the Lambda Sensors and O2 Sensors group, designed for precise monitoring of exhaust gas parameters in Mercedes vehicles. A used OEM component ensures proper compatibility with the factory engine electronics, leading to stable engine operation and correct diagnostics.

Specifications and technical data

• SKU: A0009050112
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009050112
• Substitutable numbers: A0009050112, A 000 905 01 12
• Category: Oxygen Sensors

Function and Application of the Exhaust Gas Temperature Sensor

The exhaust gas temperature sensor in the C118 body is responsible for the real-time measurement of gas temperature in the exhaust system. Based on this data, the engine control unit adjusts fuel injection, the exhaust gas purification system, and the engine's protective strategies. A properly functioning sensor:

• supports the maintenance of optimal combustion parameters,
• facilitates emissions control and the operation of exhaust gas purification systems,
• prevents overheating of exhaust system components.

Benefits of Using an Original Mercedes Sensor

Using an original exhaust gas temperature sensor in the Mercedes C118 ensures high compatibility with the factory control unit software. This results in:

• a stable and predictable sensor signal for the ECU,
• reduced risk of diagnostic errors and warning light illumination,
• maintained proper engine operating characteristics across the full load range.

A used OEM part is a cost-effective solution that is also technically matched to the specific vehicle configuration, which is particularly important in modern exhaust systems.

Integration with the Exhaust System and Vehicle Electronics

The exhaust gas temperature sensor works directly with the engine control system and other exhaust system components. A correctly selected sensor:

• ensures proper communication with the control module,
• allows for accurate interpretation of temperatures at various points in the system,
• supports regeneration and protection strategies for exhaust components.

By maintaining factory parameters, the original sensor helps preserve the integrity of the entire system, which is important for both component durability and subsequent service diagnostics.

Selection, Installation, and Operation

When replacing the exhaust gas temperature sensor in a Mercedes C118, it is crucial to match the part by OEM number and ensure compatibility with the specific engine version. A correctly selected sensor:

• facilitates installation in the location designated by the manufacturer,
• reduces the need for electrical system modifications,
• ensures a quick restoration of full system functionality.

Installation by a qualified service center is recommended, using appropriate tools and torque specifications to maintain seal integrity and correct sensor positioning in the exhaust gas flow.

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 lambda sensors, O2 sensors, or related temperature sensors, check the available parts in the Mercedes Lambda Sensors and O2 Sensors category.

Why Choose a Used Exhaust Gas Temperature Sensor

A used exhaust gas temperature sensor is a solution that allows for reduced repair costs while maintaining the original manufacturer's specifications. For electronics and sensors, it is important that the part comes from the same component family, which minimizes the risk of hardware or software incompatibility. More practical tips on selecting and installing used modules and sensors can be found in the article Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?.