A/C - Howling/Droning Noise From Dash Area
SI B 64 50 02Heating and Air Conditioning
February 2006
Technical Service
This Service Information bulletin supersedes Advance S.I. B64 50 02 dated September 2002. The content of the Service Information is unchanged.
SUBJECT
Howling/Droning Noise at 50 to 55 mph from Fresh Air Flap
MODEL
E53 (X5) vehicles with IHKA up to 5/02 production
SITUATION
A customer may complain that when using the heating and air conditioning system and in fresh air mode, there is a howling/droning noise that comes from the right side of the center dash area at approximately 50 to 55 mph. The noise disappears when the "Recirculation" button is pressed.
CAUSE
Incorrect positioning of the right hand fresh air flap.
CORRECTION
On a customer complaint basis only, and after verifying the complaint, replace the IHKA Control Module as per Repair Instructions RA 6411749.
PARTS INFORMATION
WARRANTY INFORMATION
For Information only.
Disclaimer