Compatibility : 1993-1997 Lexus GS300 3.0L 2001 Toyota MR2 Spyder 1.8L 2001-2003 Toyota Prius 1.5L Features: Porous PTFE Filter - Allows atmospheric oxygen to enter the sensor without permitting water or engine contaminants to seep into the casing. Double Protection Cover - Maintains proper unit temperature for quicker response times and protects the ceramic element against silicone and lead poisoning. Stainless Steel Housing - Resists corrosion and contamination with a rugged, watertight body. Aluminum-Oxide Trap Layer - Keeps silicone and lead outside the ceramic elient through, preventing damage to the platinum electrode. .