Exhaust Gas Temperature Sensor Mercedes SLK R172 W205 W212 OM651 A0009055202

Exhaust Gas Temperature Sensor Mercedes SLK R172 W205 W212 OM651 is a precision exhaust system component responsible for the accurate measurement of exhaust gas temperatures in diesel engines. Thanks to its factory origin from the Mercedes brand, it ensures proper cooperation with control electronics and stable operating parameters of the power unit.

Specifications and technical data

• SKU: A0009055202
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009055202
• Substitutable numbers: A0009055202, A 000 905 52 02
• Category: Oxygen Sensors

Purpose and function in the exhaust system

The offered exhaust gas temperature sensor is dedicated to Mercedes SLK R172 models and selected versions of the W205 and W212 with the OM651 engine. This component operates in the direct stream of gases within the exhaust system, transmitting information about the current exhaust temperature to the engine control unit.

A properly functioning exhaust gas temperature sensor:

• supports the correct operation of exhaust gas treatment systems,
• enables precise control of the combustion process,
• reduces the risk of overheating exhaust system components,
• helps maintain stable performance and engine refinement.

Benefits of using an original Mercedes sensor

Choosing an original exhaust gas temperature sensor from the Lambda sensors and O2 sensors group translates into high compatibility with the factory engine control software. This means predictable behavior of the power unit, no need for adaptation, and a lower risk of diagnostic errors.

Key advantages include, among others:

• stable measurement characteristics over a wide temperature range,
• proper cooperation with emission control systems,
• preservation of factory operating parameters for the OM651 engine,
• easier diagnostics in the event of potential faults.

Component condition and service application

The presented exhaust gas temperature sensor is a used component, which allows for an economical repair of the exhaust system while maintaining the manufacturer's original specifications. This is a practical solution in situations where the existing sensor generates errors, causes the engine to enter limp mode, or disrupts the operation of emission control systems.

Due to its factory origin from a Mercedes vehicle, the sensor represents a beneficial alternative to cheaper replacements, especially in cars where consistency with original electronics and control software is essential.

Matching by part number and integration with electronics

The exhaust gas temperature sensor has an original OEM part number and interchangeable numbers, which facilitates unambiguous identification and selection for the specific version of the OM651 engine in SLK R172, W205, and W212 models. Before purchasing, it is worth comparing the markings with service documentation or the removed component to ensure full mechanical and electrical compatibility.

This component works with the factory engine controller, transmitting the measurement signal necessary for exhaust temperature control. A correctly selected sensor reduces the risk of errors related to the exhaust system, filter regeneration, and the operation of emission reduction systems.

Expansion of the exhaust measurement system in Mercedes

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, measuring probes, or exhaust composition control elements, check the available parts in the Lambda sensors and O2 sensors Mercedes category.

When choosing a used exhaust gas temperature sensor and other engine electronics components, it is worth paying attention to selection based on the part number, engine unit version, and vehicle equipment. Practical tips on the safe use of the second-hand electronics market, including engine controllers, comfort modules, and parking sensors, can be found in the article: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.