The Samsung Galaxy A51 earns a 4 out of 10 on our repairability scale (10 is the easiest to repair):

A single Phillips driver takes care of all the screws.

Many components are modular and can be replaced independently.

The plastic back cover is glued in place, but can be removed fairly easily with heat.

The battery is accessible but heavily glued in place.

Screen repairs require a lot of disassembly while battling tough adhesive.