# Loud Screaching Sound while coasting but not accelerating Audi A4 wagon

**URL:** <https://community.cartalk.com/t/loud-screaching-sound-while-coasting-but-not-accelerating-audi-a4-wagon/1479>\
**Category:** Maintenance/Repairs\
**Created:** [July 9, 2007, 5:30pm UTC](https://community.cartalk.com/t/loud-screaching-sound-while-coasting-but-not-accelerating-audi-a4-wagon/1479 "2007-07-09T17:30:19Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![chrispalmisano](https://avatars.discourse-cdn.com/v4/letter/c/58956e/32.png) [@chrispalmisano](https://community.cartalk.com/u/chrispalmisano)\
**Post date:** [July 9, 2007, 5:30pm UTC](https://community.cartalk.com/t/loud-screaching-sound-while-coasting-but-not-accelerating-audi-a4-wagon/1479/1 "2007-07-09T17:30:19Z")

</div>

Today while driving I noticed a loud screaching sound coming from under my car while coasting but not accelerating. I don’t believe its the breaks and it sounds like metal is grinding against metal, anyone have any thoughts? THANKS!!

---

<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/cartalk/original/3X/1/d/1d47c66a543aa6c5a7873bb2320858f978ff52ed.png) [@system](https://community.cartalk.com/u/system)\
**Post date:** [July 9, 2007, 5:57pm UTC](https://community.cartalk.com/t/loud-screaching-sound-while-coasting-but-not-accelerating-audi-a4-wagon/1479/2 "2007-07-09T17:57:02Z")

</div>

It’s impossiblke to tell without seeing the car. It could be brakes (torque load on the axles can have suttle effects, and it can affect noises), it could be a component bearing (acceleration puts a load on the serpentine belt and can affect noises), it could be the tensioner, it’s just impossible to tell from here. It’s always a good idea to get the brakes checked for noises like this anyway.