Question about 2003 Ford Explorer

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When I turn on the a/c there is a low knocking noise in the rear l/h side of the truck

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The knocking that you hear is the compressor turning on it is low on oil it needs serviced

Posted on Aug 07, 2009

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SOURCE: knocking noise from rear passe ger side 2003

Your axle bearing is more than likely shot. The right side goes out first for some reason. Fairly inexpensive if you can do it yourself.

Posted on Nov 21, 2009

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