iFixit documents screen, battery and USB-C replacement. Some new screens omit sensors or magnets, and display calibration may be needed afterward.
What to check before buying
Replacement screen contents
The M4 screen guide warns that some replacement panels omit ambient-light sensors, magnets or the microphone. Fresh screen adhesive is needed, and Repair Assistant calibration can restore lost display functions.
Battery work
The battery guide calls for replacement battery and screen adhesives. Its separate USB-C charging-port procedure means a charging fault need not be quoted as a whole-board replacement without a port diagnosis.