Denso 234-9001 Air Fuel Ratio Sensor AFR Technology, Improved Engine Performance, Sensor Type: Thimble Double Protection Cover Maintains Proper Unit Temperature for Quicker Response Times and Protects the Ceramic Element From Contamination Stainless Steel Housing Resists Corrosion and Contamination with a Rugged, Watertight Body Porous PTFE Filter Allows Atmospheric Oxygen the Enter the Sensor without Permitting Water or Engine Contaminants to Seep into the Casing Wire Length: 269mm/10.6"