Mercedes C Class W205 Exhaust Temperature Sensor 651921 Diesel A0009053101

Mercedes C Class W205 Exhaust Temperature Sensor 651921 Diesel is a component from the Engine sensors and switches group, designed for diesel systems in Mercedes C-Class W205 generation models. Precise exhaust temperature reading is crucial for the proper operation of a diesel engine, which is why a correctly selected sensor supports the stable operation of the power unit and exhaust gas treatment systems.

Specifications and technical data

• SKU: A0009053101
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009053101
• Substitutable numbers: A0009053101, A 000 905 31 01
• Fuel type: Diesel
• Part type: Sensor
• Category: Engine Sensors & Switches

Purpose and function in the diesel engine system

The offered exhaust temperature sensor works with the engine control unit, transmitting information about the current temperature of the exhaust gases. In a Diesel engine, this data is used, among other things, to control the combustion process and the operation of emission reduction systems. A properly functioning sensor helps maintain stable operating parameters, reduces the risk of overheating exhaust system components, and supports the maintenance of appropriate power characteristics.

Benefits of using an original Mercedes sensor

In Mercedes vehicles, using the correct exhaust temperature sensor has a direct impact on:

• the accuracy of exhaust gas temperature measurement under various load conditions,
• the correct response of the engine controller to changes in load and temperature,
• the stability of the injection system and exhaust gas treatment systems,
• reducing the risk of diagnostic errors related to incorrect temperature readings.

As a result, the sensor supports maintaining the efficiency of the power unit, which translates into predictable vehicle behavior and more repeatable operating parameters in daily use.

Product characteristics and fitment

The presented item belongs to the Engine sensors and switches category, which means it is designed to work with control electronics and measuring systems in the engine compartment. The sensor's construction is adapted to the conditions in the exhaust system, where high temperatures and variable thermal loads occur. Proper fitment for installation in the Mercedes C-Class W205 allows for mounting in place of the factory component, without the need to modify the wiring harness or connection socket.

Condition and use in vehicle service

The product is offered as used, making it an attractive solution for servicing or repairing the exhaust system in diesel cars when the priority is maintaining functionality at controlled costs. This type of sensor will work well both when replacing a damaged component and in situations where comparative diagnostics within the exhaust temperature measurement system are necessary.

Expanding the measurement system in the Mercedes C Class W205

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, switches, or measuring elements, check the available parts in the Mercedes engine sensors and switches category.

To make the most of used components, it is worth learning good practices for their operation and maintenance – you can find practical tips in the article How to extend the life of used car parts?, which discusses, among other things, engine and electronic components from dismantling.