Genuine OEM BMW Lambda Oxygen Sensor, part number 13628589844. This sensor plays a vital role in monitoring the oxygen content of the exhaust gases, enabling the engine management system to precisely control fuel injection for optimal performance and reduced emissions. It is installed in the exhaust system. Constructed from robust materials, it is designed for reliable operation under harsh exhaust conditions. Choosing genuine OEM ensures the sensor's calibration is exact, guaranteeing proper engine function and compliance with emission standards.