2006 4.6L 3V Explorer 4dr and Mountaineer vehicles built prior to 10/20/2005 may exhibit a moan/droan noise or some floor vibration under light acceleration between 60-70 MPH (97-113 Km/h) range, around 1800 rpm.
2003-2006 Expedition and Navigator vehicles equipped with an air suspension may exhibit an air suspension height sensor linkage arm disengaging from the suspension ball stud or height sensor rotating arm.
2007-2011 Fusion, Milan and MKZ vehicles equipped with all-wheel-drive (AWD) systems and built on or before 8/13/2010 may exhibit a driveline vibration ora howl noise at highway speeds in cold temperatures.