Denso Universal Oxygen Sensor is designed with precision, manufactured to the highest O.E. quality, guaranteed to fit right the first time. This oxygen sensor is of superior quality and will outlast most other oxygen sensors. Constructed with exclusive aluminum oxide trap, this extra layer helps to protect from silicone and lead poisoning which causes premature sensor failure. This combined with other Denso high quality features such as stainless steel housing and porous Teflon filter all contribute to make a long life oxygen sensor with improved engine performance and greater fuel efficiency.