Question about 2007 Mazda 3
It could be a bearing going bad, or the disc is resonating to a frequency that makes the 'woo woo woo' sound.
Autozone has a spray that can reduce noise of disc or drum brakes that sprays on the metal with the caliper removed.
It has little beads that get rid of squeaking noises, anyway.
If your bearing is fine, then I would try that.
Posted on Jan 01, 2011
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Posted on Jan 02, 2017
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