What signs indicate a failing starter motor?

A clicking noise when turning the key is a common indication of a failing starter motor. When you turn the ignition, the starter motor is responsible for cranking the engine. If the starter is failing or has insufficient power, it often cannot engage fully and may only make a clicking sound, indicating that the solenoid is activating but the motor itself isn't turning the engine over.

In contrast, if the engine cranks normally, this suggests that the starter motor is functioning properly. Consistent engine performance and strong ignition further imply that other components of the ignition and starting system are operating effectively, which would not typically be associated with a failing starter motor. Thus, the presence of a clicking noise is a direct sign that the starter motor may be experiencing issues and may not have enough power or may be malfunctioning completely.