Audi A3 rattle / crack noise inside plastic

[nonicker]

There is an annoying rattle/crack noise coming from B-pillar and from right top of rear seat belts. The noise is present only when i drive over bumps on the road. It sounds like plastic is cracking/adjusting.
Ive marked the noise sources on the photo.
Anyone had similar problems? Managed to fix it?
A3 8V sportback 2019.

 

[Shaferz]

I’ve got this exact issue but only on the front passenger seatbelt pillar, I’m unsure but I’m thinking of buying some sound dampening as my door has an issue too.

 

[alpesh26]

It's not an unusual problem, at least for the front seatbelt adjuster. Audi replaced mine under warranty but even the replacement started to rattle after a while

 

[nonicker]

OK, ive maanged to isolate the noise source and apply a quick fix
Cracking noise was coming from the rear seat belt holder plastic cover (marked with red arrows).
I placed firm heat insulation material underneath the plastic (so it strains that plastic piece upwards). Test drove a few miles on bumpy roads and it was better.

 

[Shaferz]

OK, ive maanged to isolate the noise source and apply a quick fix
Cracking noise was coming from the rear seat belt holder plastic cover (marked with red arrows).
I placed firm heat insulation material underneath the plastic (so it strains that plastic piece upwards). Test drove a few miles on bumpy roads and it was better.

View attachment 275953

I’ll check mine and see if I can do the same, I’ll keep you posted