human
I've been hearing a buzzing noise in my car's engine. What could it be?
assistant
It could be a number of things, but the most likely cause is an issue with your alternator. The alternator is responsible for providing electricity to your vehicle's electrical system and other components. If it fails, you may hear a loud humming noise coming from the engine compartment. You should have the alternator checked by a qualified mechanic as soon as possible.