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Does anyone have a good way to diagnose a wheel bearing going bad? I've had one wheel bearing failure at about 50K, and I think I might be having another one (70k). Compounding the problem, my Pirelli P6's with 40K are howling like a puppy who lost his mother.
 

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Re: Wheel Bearing Failures - Diagnosis? (daveV70R)

Bad wheel bearings tend to increase their howl when turning. Turning the vehicle to the right, if the noise increases, left wheel bearing bad. Opposite for left turns. Rears can usually be a little harder to determine which side but a rear passenger can ofter help with which side the noise is from.<p>My first wheel bearing went at 28K. Wasn't real loud but I knew it was going bad.<p>Tires make a different noise than wheel bearings but some techs and dealers will try to pass it off as tire noise however it doesn't go away with new tires.
 
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