How much does apple charge to fix a corroded/stuck command/options button due to liquid
Left sided Option button, Command button stuck due to old spillage of ice cream.
There are no individual keyswitches in the MacBook Pro. They use a membrane keyboard. The smallest thing that can be replaced is a keyboard.
In recent MacBook Pro, the field-replaceable unit has become the entire top-case, including the metal shell, trackpad, and battery.