Hi,
Since I changed my timing chain this summer I have a rattle on my 2012 F30 320d, that seems to be coming from the airbox housing.
The sound only happens once the engine is warmed up so I suspect there's something that's not really as tight as it should be:
https://photos.app.goo.gl/gLyWnSEtV2ym1CCs6
I noticed that the cover is attached to the body with some metal clips. My guess is that these have become loose. Has anyone had a similar issue ?
Later edit: found many similar issues...