There is an occasional noise that happens only when I am braking my 2003 Corolla. My mechanic has ruled out the brakes and says there is nothing apparent that would make it dangerous to drive the car. The noise has happened on hot days, cold days, dry days, rainy/snowy days. It doesn’t happen each time I brake. When it does occur it ranges between a sound like a humpback whale’s song to a very loud screech. When it does, it is always right before the car comes to a stop. It happens when I back up and when I am going forward. I cannot reproduce it (I drove with my mechanic all over heck and gone trying to get the car to make the noise, alas, it would not). However, I did capture it at its loudest. Take a listen.