Designed with precision, manufactured to the highest O.E. quality. This O2 sensor will outlast most other oxygen sensors due to densos superior quality. Constructed with densos 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 including stainless steel housing and porous teflon filter all contribute to make a long life oxygen sensor with improved engine performance and greater fuel efficiency.