Help requested diagnosing a noise
I have heard a buzz/hum that sounds somewhat "electronic" that only last about a second then repeats. For example, it will start when I coast or accelerate. After spending some time trying to pinpoint, I think the A/C or heat needs to be on for it to make the noise.
If I have the fan off and press the snowflake to turn the a/c on, sometimes it will make the hum noise. However when I have the car parked and press the snowflake, I do not hear the hum.
Also, I have noticed that the noise appears sometimes if I come to a stop and while stopped I can get the noise to start and stop if I adjust how hard / weak I press the brake. I don't think it is related to the breaks though.
Considering the car is an 07, I'm hoping it could be a belt or pulley making the noise. Worried I won't be able to replicate while at the dealer.
Reaching out to the forum in case anyone has any ideas or has encountered a similar noise. Any help would be appreciated.