The Official Creak, Rattle and other noise complaint thread

[Dream Making]

My "new to me" 2015 Fiesta st mk7 have some weird "droning" deep bass frequency in second gear at 1200-2000 rpms when going off throttle. Not sure if is expected. Exhaust is stock

 

[Dream Making]

Also, there's a bit of whining noise at high speed when going off throttle, like barely noticeable, that sounds like is coming from the engine bay. Symposer failing?

 

[Intuit]

Once you get used to how rapidly the engine ramps, shift points, plug your symPOSER. Check for exhaust leak. Insure proper fill level and change transmission fluid.