[insanecoder]

So I applied the teflon tape (extra thick) along my trim for the creaking "doorseals"
and for a few days there seemed to be silence
but it came back (as others noticed as well)

With a bit of irritation at putting in some effort in tefloning this car
I set about to figure this out once and for all

Some investigation finally narrowed it down to:
the rear seatbelt hinges

Theoretically it doesnt seem like a culprit but lo and behold when moved ever slightly esp under say bumps in the road, the exact creak/squeaks were reproduced..

Solution: a drop of oil on the rear seat belt buckle metallic hinge

Take something which won't damage the leather and pry away gently the leather to expose the hinge deep underneath.

Apply a drop of oil via something thin and elongated (I used an ice-pick)
Alternatively you could give it a quick squirt of WD40 via the straw I suppose

The front seatbelt hinges theoretically could produce squeaks as well.. I concentrated on the rears as they were the ones likely bouncing about and squeaking on the twisties

The pic shows the hard to get at metal hinge

[BMWILUVU]

It looks like the F30 may be squeaking from many areas. I will check if mine squeaks from the belts.

[insanecoder]

Originally Posted by BMWILUVU

It looks like the F30 may be squeaking from many areas. I will check if mine squeaks from the belts.

No more squeaks for me..
imo the belt buckle could be a major culprit
since its hinged and top heavy like a mace
so on the bumps it'll want to rotate slightly
ergo creating that squeak if not lubed
like I said I reproduced it and its gone..