Mercedes W176 W246 OM607 Diesel Exhaust Gas Temperature Sensor 226401704R

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W176 W246 OM607 Diesel Exhaust Gas Temperature Sensor is a precision exhaust system component responsible for reliable exhaust gas temperature measurement near the diesel particulate filter. This allows the diesel engine control unit to effectively manage the DPF regeneration process, maintaining stable engine operating parameters. This solution helps reduce the risk of filter clogging and supports smooth, predictable engine performance.

Specifications and technical data

• SKU: 226401704R-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: 226401704R
• Substitutable numbers: 226401704R
• Fuel type: Diesel
• Category: Oxygen Sensors

Purpose and function in the exhaust system

The offered exhaust gas temperature sensor is dedicated to the OM607 diesel engine family used in Mercedes W176 models. Its task is to continuously measure the temperature of gases in the exhaust stream, which enables the engine control unit to properly manage the soot burning process in the DPF. A properly functioning sensor helps maintain optimal engine characteristics, stable performance, and correct operation of the exhaust gas treatment system.

This component works with the vehicle's electronics in real-time, providing the signal necessary for:

• monitoring temperature in the diesel particulate filter area,
• proper DPF regeneration cycles,
• reducing the risk of overheating exhaust system components,
• maintaining compliance with diesel emission standards.

Technical characteristics and compatibility

The sensor belongs to the Lambda sensors and O2 sensors group, although in this case, it is specifically responsible for temperature measurement rather than mixture composition. It is adapted to operate in demanding thermal conditions typical of diesel engines, where exhaust gas temperatures during DPF regeneration reach very high values. The component's design is optimized for integration with the Mercedes control system, which translates into consistent readings and predictable controller responses.

Due to the specific nature of diesel engine operation, the sensor must feature appropriate resistance to temperature fluctuations and signal stability over a long service life. A properly selected component of this type helps reduce DPF-related errors and limp mode activation, which directly impacts vehicle comfort.

Condition, origin, and practical application

The presented DPF exhaust gas temperature sensor is a secondary market component, allowing for an economical exhaust system repair without sacrificing a component with parameters consistent with the vehicle manufacturer's requirements. This type of part is particularly useful in situations where the vehicle displays errors related to exhaust temperature, improper filter regeneration, or a drop in performance due to limp mode.

Sensor replacement is recommended, among other things, when diagnostics indicate incorrect temperature readings, open circuits, or short circuits in the measurement installation. Using a functional component restores proper communication with the control module, which can result in more stable engine operation, better throttle response, and reduced frequency of forced DPF regenerations.

Benefits of using a used exhaust gas temperature sensor

Choosing a used exhaust gas temperature sensor for a Mercedes diesel engine is a sensible solution for drivers who want to keep their vehicle in good technical condition at controlled maintenance costs. This type of component allows you to:

• restore proper operation of the exhaust treatment system without the need for costly replacement of the entire filter,
• reduce the risk of exhaust temperature-related errors,
• maintain engine efficiency in daily operation,
• preserve consistency with the factory Mercedes engine control concept.

For users who want to consciously use secondary market parts, we have prepared a practical guide describing the selection and installation of electronic components and sensors. Detailed tips can be found in the article Used automotive electronics – ECU modules and second-hand sensors, where issues such as compatibility and diagnostics are discussed.

Expanding the measurement system in your Mercedes

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

For owners of older Mercedes models who want to gradually refresh their vehicle using proven secondary market components, the guide on upgrading cars from the 1998–2012 era may also be helpful. Practical examples and upgrade scenarios can be found in the material The second life of a youngtimer – how used parts rejuvenate cars.