Backing plates are only used on drum brakes. Your car has disc brakes on all corners. (I currently drive a 2001 Aurora)
Now, I'll need a little more information. Does the squeaking noise come only under braking, or at all times?
Does it come from the front or the back?
Usually, a squeaking sound while under braking isn't anything to worry about. The brake pads have flat retaining springs and internal clips that are meant to stop them from vibrating and chattering when the brakes are applied. Sometimes these pieces break off or get corroded. But they were only meant as a way to eliminate a pesky noise, not for safety reasons.
Also, brakes pads come with what is called a "Wear indicator" built into the pad. Once your pads are worn past a certain point, the come into contact with the rotors and produce a sound that can sometimes sound like a squeaking noise. It's meant as a way for you to tell when it's time to have your brakes serviced, before you do too much damage to your rotors. And believe me, you'd rather spend a little now on new pads, than a LOT, LOT later on new rotors.
If your are hearing this noise when the brakes are NOT applied, then it probably isn't the brakes at all. It could be something rubbing against something else. But there's no way to know for sure. So for safety reasons, I recommend you take it to a competent mechanic. YOU NEVER WANT TO FOOL AROUND WITH YOUR BRAKES. Not only could you hurt yourself, you can hurt someone else!
Thursday, December 31st, 2009 AT 10:52 PM