Mercedes-Benz C E Class W203 W211 Petrol Lambda Oxygen Sensor Probe A0015400517

Mercedes-Benz C E Class W203 W211 Petrol Lambda Oxygen Sensor Probe is an item from the Lambda sensors and O2 sensors category, designed for petrol fuel systems in Mercedes vehicles. This used sensor provides an economical way to restore the proper operation of the air-fuel mixture control system while maintaining the engine's factory performance characteristics. It is a solution for users who expect a proven component with parameters consistent with the original manufacturer's specifications.

Specifications and technical data

• SKU: A0015400517
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0015400517
• Substitutable numbers: A0015400517, A 001 540 05 17, AS
• Fuel type: Petrol
• Category: Oxygen Sensors

Purpose and function of the Mercedes-Benz C E Class W203 W211 Petrol Lambda Oxygen Sensor Probe

The lambda sensor in Mercedes W203 and W211 models is responsible for precise measurement of oxygen content in exhaust gases, which allows the engine control unit to continuously adjust the air-fuel mixture. In petrol engines, this is crucial for:

• stable operation at idle and under load,
• maintaining optimal fuel consumption,
• reducing exhaust emissions to the level specified by the manufacturer,
• protecting the catalytic converter from overheating and excessive load.

Selecting a sensor dedicated to specific Mercedes generations ensures compatibility with the factory ECU software and the exhaust system's operating characteristics.

Benefits of using an original lambda sensor in a petrol system

In petrol-powered vehicles, a stable and repeatable sensor signal characteristic is particularly important. Using a component from disassembly that complies with factory specifications allows for:

• proper ECU response to changes in engine load and operating temperature,
• better engine refinement across the entire rev range,
• reduced risk of mixture-related errors (too lean / too rich),
• greater predictability of vehicle behavior during acceleration and deceleration.

For the user, this means more predictable operation and the ability to maintain performance parameters close to factory standards without the need to invest in a new part.

Characteristics of the used component and installation aspects

The presented Mercedes-Benz C E Class W203 W211 Petrol Lambda Oxygen Sensor Probe comes from disassembly, which allows for combining reasonable cost with the preservation of the original design. A used element of this type is particularly attractive in situations where:

• a quick and budget-friendly exhaust system repair is necessary,
• the vehicle is used intensively and efficiency is the priority,
• compatibility with the factory electrical harness and controller is essential.

The lambda sensor from this series is designed as a replaceable element, which facilitates installation in place of a worn-out sensor without the need for system modifications. A correctly selected component reduces the risk of adaptation problems in the engine control unit.

Selection, diagnostics, and technical support

To maximize the potential of used electronics and sensors in modern vehicles, it is worth paying attention to selection based on manufacturer markings, compatibility with a specific engine version, and the current condition of the electrical system. Practical tips on selecting and installing used sensors and control modules can be found in the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Mercedes-Benz C E Class W203 W211 Petrol Lambda Oxygen Sensor Probe – expansion and modernization of the system

If you are planning a comprehensive repair or modernization of the exhaust system area in your Mercedes and need other elements from the same group, such as additional pre-catalytic sensors, post-catalytic sensors, or related O2 sensors, check the available parts in the Lambda sensors and O2 sensors Mercedes category.