that noise in that back is it like a low hum?? just like something you'd hear if your idiot friend was in the back going "mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm" if so thats deff your rotors. something is grinding on em, i heard that noise too and my right rear rotor basically ate thru from the calipers and pads.
and where did you hear the pop exactly. its in the front obviously but in the dash? closer to the floor? have someone stand in front of your car and listen for it. if it happens every time you reverse then go forward open the hood and listen for it. i have a rickety ass
stang so i cant say i have that problem because everything on my car squeaks and rattles
