Mercedes W118 W177 W247 Engine Exhaust Gas Temperature Sensor A0009059414

Mercedes W118 W177 W247 Engine Exhaust Gas Temperature Sensor is a precision exhaust system component responsible for accurate exhaust gas temperature measurement and stable engine operation. As a component from the Lambda sensors and O2 sensors group, it supports proper air-fuel mixture control and protects engine sub-assemblies. This used OEM part is a sensible choice for drivers and workshops looking for a proven solution at an attractive price.

Specifications and technical data

• SKU: A0009059414
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009059414
• Substitutable numbers: A0009059414, A 000 905 94 14
• Category: Oxygen Sensors

The role of the exhaust gas temperature sensor in Mercedes engines

The exhaust gas temperature sensor in Mercedes W118, W177, and W247 series models is responsible for continuous monitoring of operating conditions within the exhaust system. Based on its signal, the engine control unit can:

• adjust fuel dosage and injection timing,
• control the exhaust after-treatment process,
• protect the turbocharger and exhaust system components from overheating,
• support the proper operation of exhaust emission control systems.

This stabilizes engine operation, reduces the risk of entering limp mode, and improves engine refinement, especially under load.

Benefits of using an original sensor

Choosing an original exhaust gas temperature sensor for a Mercedes translates into predictable vehicle behavior and easier diagnostics. As a component from the same group as factory Lambda sensors and O2 sensors, it ensures:

• proper electrical characteristics matched to the engine control unit,
• correct response to temperature changes across a wide operating range,
• consistency with the factory emission control strategy.

For workshops, this means fewer warranty returns and faster confirmation of repair correctness during test drives or diagnostic testing.

Application in W118, W177, W247 models

The sensor has been designed for modern engines used in W118, W177, and W247 bodies. In practice, this means:

• compatibility with the electrical architecture of these generations,
• proper cooperation with factory control unit software,
• easier installation in the manufacturer-designated location in the exhaust system.

Such a match reduces the risk of errors associated with incorrect parameters of aftermarket replacements and makes it easier to keep the vehicle compliant with emission requirements.

Condition, installation, and practical aspects

The offered exhaust gas temperature sensor is a used part, which allows for lower repair costs while maintaining original manufacturer specifications. This solution is particularly beneficial when servicing high-mileage vehicles, where both reliability and operating economy are important.

During installation, it is worth paying attention to:

• proper seating of the sensor in the exhaust system socket,
• using the correct tightening torques,
• checking the wiring harness and connectors for mechanical damage.

After installation, it is recommended to clear any stored errors in the control unit and verify temperature readings using a diagnostic tester to confirm a stable measurement signal.

Selection by OEM and practical knowledge

When selecting an exhaust gas temperature sensor for a specific Mercedes, it is crucial to compare data by OEM number and interchangeable part numbers. This facilitates matching to the specific engine version and model year, and minimizes the risk of installing the wrong part. Detailed tips on choosing used modules and sensors, including rules for selection by VIN and OEM, can be found in our guide: Used automotive electronics – ECU modules and second-hand sensors.

If you want to further streamline the purchasing process and learn practical rules for safely choosing parts online, the following material will also be helpful: Safe purchase of used car parts online – a step-by-step guide.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as additional temperature sensors, measurement probes, or exhaust composition control elements, check out the available parts in the Mercedes Lambda sensors and O2 sensors category.