Please check fitment notes & description for accurate information. 1998-2001 BMW 750iL 5.4L 2000-2003 BMW X5 4.4L 2002-2003 BMW X5 4.6L 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. How to install the oxygen sensor? .
