Final answer:
Most alternators have brushes inside that cannot be removed until the alternator is disassembled.
Step-by-step explanation:
Most alternators have the brushes inside the alternator that cannot be removed until the alternator is disassembled. The brushes are essential components of alternators as they make contact with the rotating rotor to provide electrical current. They wear down over time and need to be replaced periodically to ensure proper functioning of the alternator.