How do I know if my Audi 80's alternator is failing?

I recently noticed some strange noises coming from my Audi 80's engine and I'm worried it could be the alternator. How can I tell if it's failing or if it's just a minor issue?

One way to determine if your alternator is failing is to check your car's battery voltage. If it's below 12 volts, then it's likely your alternator is not charging the battery properly and needs to be replaced. Alternatively, you can also take your car to a mechanic to run a diagnostic test.