For BMW E91 2005-2011 Vehicle Oxygen Sensing O2 Sensor Lambda

Compatibility：For E91 2005 2006 2007 2008 2009 2010 2011 Function: The signal output from the oxygen sensor fluctuates in response to changes in the oxygen content of the exhaust; these fluctuating signals serve as a key indicator of combustion status and form the basis for closed-loop control. Installation: When installing this oxygen sensor, take care to resist water or cleaning agents from entering the sensor. When cleaning the engine compartment, take care to avoid the sensor area to reduce the risk of water ingress affecting performance. Please note: Before purchasing, please check that the make, model, year and engine type of your vehicle match those listed, to avoid installation failures due to incompatible specifications. After-sales service: Should you encounter any issues whilst using the product, please let us know and we will provide a solution without delay.