Proper maintenance and replacement of a car's ball joints is necessary for safety. The front ball joints allow the front wheels and suspension to move back and forth as well as up and down when the steering wheel is turned and the vehicle is traveling over the road. Excessively worn ball joints can break, causing the wheel to collapse(see picture) and control of the vehicle is gone. However, the vehicle typically gives indications that the ball joint is BAD long before a failure of this magnitude occurs. Common signs include clunking noises and excessive vibration from the front and you may start steering to the right or left unintentionally.
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