Originally Posted by SydneyRoo
there was actually a thread on it here somewhere.. Probably someone's stereo install. This was a long time ago so it might take a bit of digging.
Front Doors only, but helpful:
2012 Focus SE Hatchback Sport - Changing stock speakers
Instructions, but no pics for both sets of doors:
Detailed instructions on removing 2012 door panels for speaker install
If it's the headliner, check to see if the 3M "Velcro" came undone. If not, it's probably the (failed) glue making the noise.
2012 FF Ti HB Kona Blue, DCT, Built 5/24/2011, 401A + Ti Handling Package, Parking Technology Package, Winter Package, Moonroof, and MFT w/NAV at v3.8 153k miles and counting...