Please check fitment notes & description for accurate information.Mercedes-Benz ML320 Base 3.2L 2001-2003Mercedes-Benz ML350 Base 3.7L 2003-2005 Oxygen Sensor's Location: How do I know the O2 sensor is good or not? Check engine light on A reduction in fuel economy. Your catalytic converter fails unexpectedly Exhaust emissions reach undesirable levels. .
