OKAY MOTOR Upstream Air Fuel Ratio Sensor for Mazda 3 Mazda 5 2.0L 2.3L Upstream Air Fuel Ratio Oxygen Sensor fits Mazda 3 5 2.0 2.3L L4 Part #: 234-5015, LFL7 18 8G1A, LFL7188G1C New Aftermarket Replacement Unit. 180-days Manufacturer Type Warranty Limited. Applications: 2006-2010 Mazda 3 2.3L 4 Cyl, 2006-2009 Mazda 3 2.0L