Downstream O2 Oxygen Sensor For 2009-2014 Toyota Matrix Corolla 1.8L 234-4305 US Fit for: 2009-2013 Toyota Corolla 1.8L 2009-2014 Toyota Matrix 1.8L 2009-2010 Pontiac Vibe 1.8L Specifications: OE Number: 234-4305 Product Material: Stainless Steel Product Color: Silver Installation Position: Downstream Packaging Weight: 139 g Packaging Dimensions (cm): 15.5 x 10.5 x 5 Functions: The Downstream oxygen sensor is mainly used to Detect Whether the Three-way Catalytic Converter Works Normally. Features: .