Denso Universal First Time Fit oxygen sensors are constructed of the highest quality materials available. High-quality stainless steel, porous polytetrafluoroethylene (PTFE), fluorine rubber, aluminum oxide, high-grade platinum and ceramics are used in each DENSO sensor. Denso First Time Fit oxygen sensors are coated with a special formulation of aluminum oxide to trap impurities outside of the ceramic element. In head-to-head testing against the leading competitors, DENSO oxygen sensors were rated two times more resistant to silicone and lead poisoning. Product Features:SUPERIOR DESIGN - Maximizes engine performance and fuel efficiency while reducing harmful emissions.DOUBLE-PROTECTION COVER - Maintains proper unit temperature for quicker response times and protects the ceramic element against silicone and lead poisoning.ALUMINUM-OXIDE TRAP LAYER - Keeps silicone and lead outside the ceramic element through DENSO's exclusive design, preventing damage to the platinum electrode.STAINLESS STEEL HOUSING - Resists corrosion and contamination with a rugged, watertight body.POROUS PTFE FILTER - Allows atmospheric oxygen to enter the sensor without permitting water or engine contaminants to seep into the casing. Critical Installation Notes: Please read the installation directions included in the box before removal of the original oxygen sensor form the vehicle. - Vehicles equipped with Air Fuel Ratio Sensors may look very similar to the Oxygen Sensor. Please confirm the correct part before ordering. Recommended Installation Tool - 234-0100, O2 Sensor Socket Set
