Mercedes W204 C207 W212 M271 Lambda Sensor Oxygen Probe A0065422718

Mercedes W204 C207 W212 M271 Lambda Sensor A0065422718 is an original part from the Lambda Sensors & O2 Sensors category, designed for exhaust systems of Mercedes models with the M271 engine. A used OEM sensor allows for maintaining factory engine operating parameters, stable mixture composition regulation, and proper cooperation with the engine control electronics.

Specifications and technical data

• SKU: A0065422718
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0065422718
• Substitutable numbers: A0065422718, A 006 542 27 18
• Category: Oxygen Sensors

Application and Compatibility

The presented lambda sensor is dedicated to Mercedes C-Class, E-Class, and coupé vehicles from the W204, C207, and W212 families equipped with the M271 engine. The use of an original oxygen sensor ensures proper communication with the factory engine control unit, which translates into stable idle operation, correct throttle response, and maintenance of appropriate exhaust emission parameters.

The part comes from the Mercedes-Benz OE line, ensuring compatibility with factory wiring harnesses, connectors, and control unit software. This solution is particularly beneficial when replacing a damaged sensor in vehicles used daily, where predictable performance and no need for aftermarket adapter adjustments are crucial.

Role of the Lambda Sensor in the Exhaust System

In the M271 engine, the lambda sensor is responsible for measuring the oxygen content in the exhaust gases and transmitting the signal to the engine control unit. Based on this, the ECU adjusts the fuel dosage, maintaining the mixture within the optimal range. A functional O2 sensor contributes to:

• stable engine operation across the entire RPM range,
• reduced fuel consumption through precise dosage correction,
• proper catalytic converter operation and effective emission reduction,
• decreased risk of errors related to the mixture and exhaust system.

The use of an original lambda sensor is particularly important in modern engines, where the engine control unit is sensitive to the signal parameters from the oxygen sensor and may not cooperate correctly with random aftermarket replacements.

Product Characteristics and Condition

The offered lambda sensor belongs to the OEM category, meaning it was designed specifically for Mercedes exhaust systems and meets the manufacturer's requirements regarding signal characteristics, thermal resistance, and electrical compatibility. The product is used, allowing for an economical replacement while maintaining original design specifications.

For the user, this means the possibility of restoring proper mixture control system operation without the need to invest in new, expensive components. In many cases, replacing a lambda sensor with a functional OEM part resolves issues with uneven engine operation, increased fuel consumption, or illuminated engine warning lights.

Benefits of Using an Original Mercedes Lambda Sensor

Choosing an original lambda sensor for a Mercedes with an M271 engine is a solution that technically and functionally surpasses random aftermarket alternatives. Key advantages include:

• Factory Electrical Compatibility – correct signal parameters for the engine control unit, without the need for wiring modifications.
• Stable Mixture Regulation – the ECU receives reliable data, reducing emergency adjustments and improving engine smoothness.
• Better Catalytic Converter Cooperation – a correct signal from the sensor helps maintain the efficiency of the exhaust gas purification system.
• Economical Repair – a used OEM part allows for reduced service costs while maintaining factory technical solutions.

Selection, Installation, and Additional Information

Before purchasing, it is advisable to verify the sensor's compatibility with the specific engine version and vehicle year, using the OEM number or catalog data. A correctly selected O2 sensor allows for plug-and-play installation, without interfering with the electrical harness or requiring adapters.

If you are interested in other Mercedes Lambda Sensors & O2 Sensors, check the available products in the category: Mercedes Lambda Sensors & O2 Sensors.

You can find more practical tips on selecting and installing used sensors and control modules in the guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?