Knocking sound in back left

[Retrospekt]

Any time I hit a bump I heard a loud knock from the back. I don't know how else to describe the sound.

The rear assembly (Strut, control arms, etc.) was recently replaced due to being bent in. What could they have installed incorrectly that would make this noise? Or is one of the parts they put in bad?

[carsrus]

Bad strut mount, or bad rear sway bar bushings are the most common.

Take it back to the shop, its theirfault. They might have left something loose.