Just drove the M3 for the first time in a few weeks and noticed the headliner is starting to sag on both sides. It's only those two areas but I'm hoping they won't spread.
I searched a bunch but couldn't find a single thread either here or on e90post regarding sagging headliners. Doesn't seem like a very common issue.
Car is a 2008 that's been garaged its entire life. Has anyone else seen this and is there any way to permanently fix it?
