Rear camera not detected

A few weeks ago the rear camera stopped working on my Nexus 5. I tried several resets (both soft and hard) and even flashing older system images, to no avail (ironically, after a hard reset and an image flash the camera app disappears).

I decided to buy a new camera module to see if that would fix it. Now, with that installed, I managed to get the camera app back up, but it says that there is no rear facing camera on the device. As a note, the front facing camera still works perfectly.

I've double checked the connections multiple times and the camera module is connected solidly.

Has anyone else encountered this issue before? And, is it possible I just got a bad camera module or do you think I would need to replace the whole logic board?

Thanks!