BMW 3 4 Series F80 M3 F82 M4 Lambda Monitor Sensor L=690MM 7848486

BMW F80 M3 F82 M4 Lambda Sensor is a part from the Lambda Sensors & O2 Sensors category, designed for precise control of the air-fuel mixture in sporty BMW models. The original nature of the part ensures stable operation with the factory engine control unit, and its used condition allows for an economical yet technically correct replacement of the component.

Specifications and technical data

• SKU: 7848486
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7848486
• Substitutable numbers: 11787848486, 7848486
• Category: Oxygen Sensors

Purpose and Function of the BMW Lambda Sensor

The lambda sensor in BMW F80 M3 and F82 M4 models is responsible for the real-time measurement of oxygen content in exhaust gases and transmitting the signal to the engine control unit. This allows the injection system to continuously adjust the fuel dosage, maintaining:

• stable engine operation across the full range of loads,
• proper idle and partial load operation,
• efficient operation of the exhaust gas purification system, including the catalytic converter,
• emission control in accordance with BMW's factory specifications.

A correctly selected O2 sensor is crucial for maintaining the characteristic M-series engine performance, especially during dynamic driving.

Benefits of Using an Original Lambda Sensor

Using an original sensor to replace a worn-out component restores the factory parameters of the fuel system. In practice, this means:

• more predictable throttle response and repeatable performance,
• reduced risk of increased fuel consumption due to incorrect mixture adjustments,
• decreased probability of engine control unit errors,
• better compatibility with factory ECU software without the need for adaptation.

For users who care about their car's technical condition, replacing the lambda sensor with an original part is one of the fundamental steps when diagnosing mixture problems, rough engine running, or a lit engine warning light.

Characteristics of a Used O2 Sensor

The presented sensor belongs to the group of used OEM parts, allowing for a reasonable cost while maintaining the original manufacturer's specifications. Such components are often chosen by users who:

• are looking for parts compatible with the factory electrical system and connectors,
• prefer original components over aftermarket parts of unknown origin,
• are restoring or servicing cars used both daily and occasionally on the track.

A used O2 sensor can also be an attractive option for comparative diagnostics – as a test element that allows for quick verification of whether the lambda sensor is the source of the problem.

Selection by Numbers and Compatibility

The selection of a lambda sensor for specific BMW F80 M3 and F82 M4 versions should be based on manufacturer's catalog data, OEM part numbers, and interchangeable numbers. This helps avoid issues with cable length, connector type, or signal characteristics. If in doubt, it is advisable to use the vehicle's VIN or consult with an experienced diagnostician regarding the configuration.

If you want to better understand how to safely choose used sensors and other electronic components, you will find practical tips in the guide: Used Automotive Electronics – How to Make Informed Choices for Used ECUs and Sensors.

Other BMW Lambda Sensors & O2 Sensors

For users looking for other BMW Lambda Sensors & O2 Sensors, a dedicated category has been prepared where you can compare different variants based on application and configuration. Check the available BMW Lambda Sensors & O2 Sensors to select the element best suited for your vehicle.