so whenever i hit a bump or something i hear a knocking noise from the rear driver side strut area, so i assumed it was the struts and had a friend replace both rear struts. long story short im still hearing the noise and have no idea what else to check, we took out the seats and interior panel in that area and cant find anything that seems loose, i have a coupe and the noise is like in the area of where the seatbelt comes out of on the side, if that makes sense, any ideas? i dont know what else to check and the noise is really obnoxious