Lambda Sensor BMW F20 F21 F30 F31 LCI Diesel Oxygen Probe Sensor L=550MM 7645875

Lambda Sensor BMW F20 F21 F30 F31 LCI Diesel Oxygen Probe Sensor L=550MM is an original component from the Lambda sensors and O2 sensors group, designed for BMW F-series diesel engines after the facelift. It is responsible for the precise measurement of exhaust gas composition, which allows the engine control unit to ensure stable operation, reduce fuel consumption, and maintain compliance with emission standards.

Specifications and technical data

• SKU: 7645875
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7645875
• Substitutable numbers: 11787645875, 7645875
• Fuel type: Diesel
• Category: Oxygen Sensors

Function and importance of the lambda sensor in a BMW diesel engine

The lambda sensor in BMW F-series Diesel units operates in a demanding exhaust environment, monitoring oxygen content and transmitting a signal to the engine control system. A properly functioning O2 sensor stabilizes the fuel dosage, supports the efficient operation of the injection system, and helps maintain the appropriate operating conditions for the diesel particulate filter. As a result, the engine responds predictably to load, and exhaust emissions remain at a controlled level.

Design, cable length, and fitment

The presented lambda sensor features a 550 mm long cable, which facilitates correct routing of the harness in the engine bay and ensures a perfect fit with factory mounts in BMW F20, F21, F30, and F31 models after the facelift (LCI). The connector used is prepared for integration with the original electrical installation, allowing for installation without any modifications to the wiring and minimizing the risk of connection errors.

Application in BMW vehicles with Diesel engines

This component has been designed for Diesel powertrains used in compact and mid-size BMW F-series models after the body modernization. Proper matching of the lambda sensor to a specific engine version is crucial for the correct operation of the control system, which is why it is worth verifying compatibility with your vehicle based on technical data and manufacturer specifications before purchasing.

Performance characteristics and advantages of using a used part

The offered lambda sensor is an aftermarket component, which allows for reduced maintenance costs while maintaining the original design and performance characteristics. A used OEM part typically retains its factory electrical and mechanical parameters, and its use helps restore correct oxygen sensor readings in the exhaust system. This is a practical solution when errors related to the fuel mixture, power loss, or improper operation of the exhaust gas treatment system occur.

Comprehensive service for BMW exhaust control systems

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as additional sensors, pre-catalytic converter sensors, or sensors behind the diesel particulate filter, check out the available parts in the BMW Lambda sensors and O2 sensors category.

More about choosing used electronics and sensors

When selecting a used lambda sensor, it is worth knowing the basic principles of assessing the condition of electronics and sensors in a car. How to safely choose components from the secondary market, what to pay attention to during installation, and what are the typical symptoms of wear – these are issues discussed in more detail in the article Second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, which will help you consciously plan the repair of the control system and sensor diagnostics.