I've replaced both of mine at different times, both because of speed sensors not noise. You can test the speed sensors with an ohm meter, but if they're just noisy and not setting of the dash lights you have to go with a hard corner to the left, if it gets louder then it's the right bearing, then a hard corner to the right, if that's louder then it's the left bearing.....
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2003 2.2 5sp.
Tight Lines..............................
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