We have a '02 Ody with over 150k miles on it and recently it started making this ringing sound after it warms up. It happens at idle speed, or at least that's when we hear it. Our local repair shop told us that it's the alternator and will replace it for ~$500. Has anyone had this problem before? Anyone have any input on how to get the alternator out b/c it looks tight. I see others have experience with replacing just the internal components and wonders if this would be an option. Thanks in advance for your input.