Question about 2004 Mazda 6

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2004 Mazda 6 4cyl. I hope you can help. The car does this annoying humming noise that it progressively becomes louder when accelerated. It sounds like is coming from the intake manifold. This car is a hand me down and I was told that the intake was replaced four years ago when it had the same sound. I just can't believe it would happen twice in four years or the dealer just said they replaced it instead... Thank you very much Jose

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COULD BE WORN CAMSHAFT BEARINGS.

Posted on Oct 13, 2010

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Posted on Jan 02, 2017

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