My car is making a weird noise every time I apply the brakes. It only happens when I apply the brakes. It's not a schreeching or chirping noise you might hear from the sensor when your brake pads are getting thin. It's also not a metallic whine you might hear when your break pads are gone and you are getting metal on metal contact.
It's like a low pitched groan you might hear from your digestive system after eating bad shellfish, only a lot louder.
Any idea what this might be?