Mazda 3 L4-2.0L 2004-2005 Downstream. Mazda 3 L4-2.3L 2004-2005 Downstream. Mazda 5 L4-2.3L 2006-2007 Downstream. ● High Performance - Oxygen Sensor Features double protection layer, aluminum oxide trap layer, PTFE filter, and stainless steel housing.
