Audi TSB #A391414 2028902-
2009 Audi A4
Affected Component: STRUCTURE:BODY
- Supersedes Technical Service Bulletin Group 39 number 12-12 dated June 12, 2012. A squealing, howling, or whistling noise may be heard coming from under the vehicle. The condition is typically noticed when the vehicle is cold and is moving at speeds of 5 - 60 mph. The noise is from the intermediate bearing of the propeller shaft.