Compatibility: 2005-2008 Mazda 6 2.3L 2000-2002 Mazda 626 2.0L 2000-2002 Mazda 626 2.5L 2000-2001 Mazda MPV 2.5L 1999 2001-2003 Mazda Protege 1.6L 1999-2000 Mazda Protege 1.8L 2001-2003 Mazda Protege 2.0L 2002-2003 Mazda Protege5 2.0L 2001 Subaru Outback 2.5L Q&A: Q:What is Differences Between upstream and downstream O2 Sensor? .
