So I picked up a mustang a week ago and on the test drive it wasn't making any noise. The car drove fine and I didn't notice any problems. Starting today however, the car has been making a very high pitched whistling noise and I can't even figure out if it is coming from the back or the front. I included a video for you to check out. At the very end it almost sounds like its about to explode and is really loud. I am really worried so if you can help that'd be great.
View: https://www.youtube.com/watch?v=L-9VSIg4UEc