Dell 4Y37V LCD rear cover is a replacement part for the display lid of a compatible Latitude laptop. It provides the rear case section of the screen assembly and is intended for use when that cover needs replacement.
Dell lists the Latitude 3520 and Latitude 3530 as compatible systems. The part is identified as an LCD back case/rear cover, so it serves as the outer rear cover for the laptop display rather than as a display panel.
Replacing it requires removal of the system’s back cover. Dell directs users to the service manual for the removal and installation procedure.