Knocking sound

[miso_honi]

Update: Went to Nissan N. Edsa and had it checked the knocking sound. It is not mechanical but something coming from the door panel or back sit. Need pa nila baklasin lahat para malaman kung saan talaga nanggagaling .

localize the area of the noise whether is door 3 or door 4. somebody might be missing a tool after assembly of your car or somebody might have given you a spare part of something between the skin and the interior panel of the door