Volvo V40 XC60 S60 V60 V70 2.4 Diesel Lambda Sensor Oxygen Probe 30751138

Mercedes ML W163 SLK R170 M111 Lambda Sensor is an item from the Lambda Sensors and O2 Sensors category, designed for precise exhaust gas composition monitoring in diesel engines. This used genuine part from a brand associated with Volvo ensures a stable signal for the engine control unit, supporting the proper operation of the powertrain and exhaust gas purification system.

Specifications and technical data

• SKU: 30751138
• Mark: Volvo
• Condition: Used
• OEM Part Number: 30751138
• Substitutable numbers: 30751138, 0258017107, 0 258 017 107
• Fuel type: Diesel
• Category: Oxygen Sensors

Lambda Sensor Function and Application

A lambda sensor in a diesel engine is responsible for measuring the oxygen content in the exhaust gases and transmitting this information to the engine control unit. Based on this signal, the ECU adjusts the fuel dose, injection timing, and turbocharger operation to maintain an optimal mixture composition and reduce harmful emissions.

For models such as the Mercedes ML W163 or SLK R170 with the M111 engine, a properly functioning lambda sensor is crucial for:

• maintaining stable engine operation across the full load range,
• reducing smoke and excessive exhaust emissions,
• ensuring proper throttle response and smooth engine operation,
• protecting exhaust system components from excessive thermal load.

Benefits of Using a Genuine Lambda Sensor

Using a genuine sensor from the Lambda Sensors and O2 Sensors group allows you to maintain the performance parameters intended by the vehicle manufacturer. The appropriate electrical characteristics and measurement range are particularly important in diesel engines, where the control unit is very sensitive to the quality of the signal from the sensors.

The main advantages of using this component include:

• stable measurement signal – correct input data for the engine control unit,
• better combustion process control – support for smooth engine operation,
• reduced risk of entering limp mode due to sensor errors,
• compliance with the factory exhaust system configuration.

Selection by Numbers and Compatibility

When selecting a lambda sensor for a specific Mercedes model or a vehicle using components associated with the Volvo brand, matching by OEM number and interchangeable numbers is crucial. This allows you to verify compatibility with the specific engine version, electrical system type, and exhaust system configuration.

This component is designed for Diesel fuel type engines and should not be used as a substitute in gasoline engines, where the sensor's operating characteristics and control unit requirements differ. Proper matching helps avoid problems with ECU error codes, uneven engine operation, or incorrect response to load.

Condition, Verification, and Installation

The offered lambda sensor is a used part, meaning it has been removed from a dismantled vehicle and verified for its suitability for further use. This type of part is a good solution for users who want to restore proper engine control system operation while maintaining reasonable service costs.

Before installation, it is recommended to:

• check the wiring harness and connectors for mechanical damage,
• verify the absence of exhaust system leaks around the sensor's thread,
• use appropriate high-temperature paste or a sealing washer if specified by the manufacturer,
• clear any error codes in the control unit and perform adaptation if required for the specific model.

Technical Support and Additional Materials

For used electronic components and sensors, such as lambda sensors, correct selection by part numbers and understanding installation and diagnostics principles are particularly important. Practical tips on how to safely use used modules and sensors can be found in the Global Parts guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?

If you are planning a comprehensive repair or upgrade of the exhaust system and mixture control area in your Volvo and need other parts from the same group, such as oxygen sensors, additional pre- and post-catalyst sensors, or O2 sensors for different exhaust sections, check the available parts in the Volvo Lambda Sensors and O2 Sensors category.