Symptom Chart - Noise, Vibration and Harshness (NVH)

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Noise, vibration and harshness (NVH) symptoms should be identified using the diagnostic tools that are available. For a list of these tools, an explanation of their uses and a glossary of common terms, refer to NOISE, VIBRATION AND HARSHNESS article. Since it is possible any one of multiple systems may be the cause of a symptom, it may be necessary to use a process of elimination type of diagnostic approach to pinpoint the responsible system. If this is not the causal system for the symptom, refer back to NOISE, VIBRATION AND HARSHNESS article for the next likely system and continue diagnosis.

Condition	Possible Sources	Action
Mirror vibrates/loose	Exterior mirror mounting nuts loose	TIGHTEN nuts to 8 N.m (71 lb-in).
	NOTE: Compare the LH and RH exterior mirror glass to verify that the exterior mirror glass is loose. Mirror glass loose	PRESS the center of the exterior mirror glass up, down, left and right to make sure that the exterior mirror glass is seated correctly. If the exterior mirror glass is still loose, REMOVE the exterior mirror glass and INSPECT the exterior mirror backing plate for damage. If the exterior mirror backing plate is damaged, INSTALL a new exterior mirror glass. REFER to EXTERIOR MIRROR GLASS .
	Aftermarket air deflector/stone shields	If possible, REMOVE aftermarket air deflector/stone shield, then ROAD TEST the vehicle. If concern is no longer present, ADVISE customer that aftermarket components were causing undesired vibration.
Wind noise	Foam gasket between the exterior mirror and door is missing or damaged	VERIFY gasket is present and in good condition. REPOSITION gasket or INSTALL a new foam gasket between exterior mirror and door frame if necessary.
	Exterior mirror is not correctly fitted to the door	VERIFY that there are no gaps between the exterior mirror and the door. If necessary, LOOSEN the exterior mirror nuts and REPOSITION the exterior mirror.
	Exterior mirror cover	VERIFY that the exterior mirror cover is not loose or broken. If necessary, INSTALL a new exterior mirror cover. REFER to EXTERIOR MIRROR COVER .