Power off the controller and remove the batteries or battery pack
Remove the battery cover
Peel off the grip stickers if present
Remove the side grips if they are adhesive or clipped
Remove the screws hidden under the battery compartment label
Use a T8 security Torx screwdriver to remove the rear screws
Separate the front and back shell carefully
Disconnect the battery connector if attached
Lift out the internal frame and circuit board assembly
Remove the thumbsticks by pulling them straight off
Remove the D-pad by lifting it off
Remove the ABXY button caps
Remove the shoulder buttons and triggers
Disconnect any ribbon cables or small connectors
Remove the circuit board from the housing
Remove the vibration motors if needed
Keep track of all springs, clips, and small parts
Reassemble in reverse order when finished