Question about 2004 Mazda 3

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Brakes I turned in my car to change my brake pads but, after 2 months it needed to be changed again. This time they said I also need a new brake disc. How is it within 2 months I needed to replace the pads and disc when it took me three years to wear down the original brakes? Now again I need to replace both pads and disc. It also makes a knocking sound when the brakes is not engaged. What causes this? Is it something the mechanic did that's not right.

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It sounds like the rotor (brake disk) is warped. That would cause the pads to wear much more quickly because the disk "wobbles".
The warped disk can also cause the noise, depending on how bad the warp is.
When most shops change pads, they usually recommend that you "turn" the rotors, it is a way of truing the disk.

Posted on Jul 27, 2008

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