BMW E81 E87 LCI E90 E91 Lambda Monitor Probe Sensor Petrol N43 7569930

BMW E81 E87N E90 Lambda Sensor 7569930 is an original part from the Lambda Sensors and O2 Sensors category, designed for BMW gasoline engines. It enables precise exhaust gas composition measurement, contributing to stable engine operation and proper engine control system functionality. This is a practical solution for users seeking a proven, used component instead of an expensive new part.

Specifications and technical data

• SKU: 7569930
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 11787569930
• Substitutable numbers: 11787569930, 7569930
• Fuel type: Petrol
• Category: Oxygen Sensors

Purpose and Function of BMW Lambda Sensor

The lambda sensor in BMW E81, E87N, and E90 models is responsible for monitoring oxygen content in the exhaust gases of a gasoline engine. Based on its signal, the engine control unit adjusts the fuel dose, maintaining the mixture within the optimal range. This ensures stable fuel system operation and predictable, repeatable throttle response.

Using the correct lambda sensor is particularly important in modern gasoline engines, where measurement accuracy affects:

• proper operation of the catalytic converter and exhaust system,
• maintaining the correct fuel-air mixture composition,
• limiting excessive fuel consumption,
• reducing the risk of engine control unit errors.

Benefits of Using an Original BMW Lambda Sensor

An original BMW lambda sensor is designed for the specific characteristics of the brand's gasoline engines. This ensures:

• stable output signal matched to the injection maps used in BMW control units,
• reliable cooperation with factory ECU software,
• appropriate mechanical and electrical fit for installation in E81, E87N, and E90 series vehicles.

Choosing an original oxygen sensor instead of an aftermarket alternative minimizes the risk of adaptation issues, incorrect readings, or the need for repeated installation interventions.

Product Characteristics and Application in Gasoline Engines

The presented lambda sensor is designed for gasoline engine fuel systems. In these types of units, the oxygen sensor operates under demanding temperature conditions, making it crucial to use a component with a properly selected heater and measuring element characteristic. Using the correct sensor helps maintain:

• smooth transitions between warm-up mode and closed-loop operation,
• stable idle speed,
• correct response to engine load changes.

For users modernizing or servicing the exhaust system, selecting a sensor that complies with BMW's original specifications is key to maintaining predictable engine operating parameters.

Used Condition – A Practical Service Solution

The presented lambda sensor is a used item, offering a cost-effective alternative to a new OEM part. This type of component is particularly attractive for repairs on older BMW models where maintaining vehicle functionality within a reasonable service budget is a priority. A used sensor can be a good choice for, among others:

• clearing errors related to incorrect mixture composition,
• diagnosing and replacing exhaust system components,
• restoring factory engine operating parameters after previous modifications.

Selection by OEM Numbers and Technical Support

Proper selection of a lambda sensor for a specific BMW model should be based on OEM numbers and catalog data. This helps avoid mechanical and electrical compatibility issues and ensures correct cooperation with the engine control unit software. If you want to learn more about how to safely choose used ECUs and sensors by OEM numbers and compatibility, you will find practical tips in the article on selecting used ECUs and sensors by OEM numbers and compatibility.

Other BMW Lambda Sensors and O2 Sensors

If you are also looking for other BMW Lambda Sensors and O2 Sensors for various models of this brand, check out our dedicated category: BMW Lambda Sensors and O2 Sensors. This will allow you to easily compare available variants and select the element best suited for your vehicle.