Hi all

need advise, my car has this problem when start stepping oil pedal at zero speed.
it is not absorber. Technician tighten twice and no result.
Sample video as attached.
https://drive.google.com/open?id=13rvzg2Q1P...OUvkoqbmjSdFlwG
The sound come out after bumper when i start pressing oil pedal/ acceleration.
Any idea what is wrong?

Regards
Matthew
0126632665