BMW E82 E90 LCI F20 F30 F31 N55 Oxygen Sensor Petrol Lambda L=690MM 7589475

BMW E82 E90 LCI F20 F30 F31 N55 Oxygen Sensor Petrol Lambda L=690MM is an original component from the Lambda sensors and O2 sensors group, designed for BMW petrol engines. It enables precise measurement of exhaust gas composition, which translates into stable operation of the N55 unit, correct fuel mixture correction, and compliance with emission standards.

Specifications and technical data

• SKU: 7589475
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7589475
• Substitutable numbers: 7589475, 11787589475
• Fuel type: Petrol
• Category: Oxygen Sensors

Purpose and function in the exhaust system

The presented lambda sensor operates in the exhaust system of a petrol engine, monitoring the oxygen content in the exhaust gases. Based on its signal, the engine control unit adjusts the mixture composition, which helps maintain an optimal fuel-to-air ratio, stable idle speed, and correct response to load. For N55 units, this is crucial for engine refinement, dynamics, and fuel consumption.

The cable length is selected to ensure safe routing of the wiring harness in the engine bay and along the exhaust system, while maintaining appropriate installation slack. This allows for correct cable routing without excessive tension, reducing the risk of insulation damage during operation.

Benefits of using an original BMW lambda sensor

Using an original component from the lambda sensors and O2 sensors group allows for maintaining factory engine performance parameters. The sensor signal is properly calibrated relative to the control unit, which facilitates maintaining:

• stable operation at idle and under load,
• correct short-term and long-term fuel trim,
• catalytic converter efficiency and effective exhaust emission reduction,
• lower fuel consumption under typical road conditions.

For the user, this means more predictable vehicle behavior, reduced risk of mixture-related warning lights, and lower susceptibility to emission inspection issues.

Technical characteristics and installation

The lambda sensor is designed to work with petrol engines that require precise control of the mixture composition across a wide range of loads. The component is equipped with a cable of a length adapted to the typical routing paths in the BMW models mentioned in the title, which facilitates installation in the original mounting points.

When replacing, it is recommended to:

• install in a properly cleaned socket in the manifold or exhaust section,
• apply the correct tightening torque in accordance with service documentation,
• check the condition of electrical connectors and route the cable away from high-heat components.

This approach helps reduce the risk of leaks, mechanical damage, and signal interference, which is crucial for the proper operation of the engine control system.

Component condition and practical application

The offered lambda sensor is a used component, which in practice represents a favorable compromise between cost and functionality. For many users, this is a reasonable solution for diagnosing and repairing the mixture control system, especially in vehicles that are used intensively or have higher mileage.

When it comes to electronics and sensors in cars, it is worth approaching the choice of parts consciously. If you want to better understand when used components are a good choice and how to minimize the risk when purchasing them, check out our guide: The second life of electronics – when is it worth choosing used engine ECUs, comfort modules, and parking sensors?

Expanding the exhaust measurement system in BMW

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 oxygen sensors, control sensors before the catalytic converter, or sensors monitoring the catalytic converter's operation, check the available parts in the BMW Lambda sensors and O2 sensors category.

When choosing used components for the exhaust and engine control system, a practical guide to the secondary market, available here, may also be helpful: Used parts – Your guide to the best deals in the automotive store. Thanks to it, you will find it easier to assess how to choose the right components and ensure the long-term efficiency of your vehicle.