Oxygen O2 Sensor Fitting Bung M18 x 1-5 Straight Threaded 2 Pack-45mm Silver-

content include:2 pack Stainless steel material.Polished front surfaces enabling perfect tightening Threads made with dedicated tool, perfect accuracy and repeatability Made by professional manufacturer, quality assurance The oxygen sensor is widely used on modern cars is one of the sensors, the normal operation of the engine and exhaust emission control plays a vital role. If the oxygen sensor fails, it may cause poor engine performance and increase fuel consumption The light gray tip of the oxygen sensor is the normal color If the oxygen sensor fails, it may cause poor engine performance and increase fuel consumption. It is recommended to replace the oxygen sensor in the following situations: The tip of the oxygen sensor turns white due to lead contamination The top of the oxygen sensor turns brown due to silicon contamination Engine fault lamp flash,maybe you need to change a oxygen sensor The top of the oxygen sensor turns black. It is also recommended to replace the oxygen sensor after troubleshooting the engine carbon deposit.