Situation: Corrosion can develop between the hub and brake rotor of automobiles equipped with disc brakes. This causes a shimming effect, knocking the two pieces out of parallel and resulting in excessive run-out of the rotor. The result is excessive brake pad wear, brake shuddering, and uneven braking and rotor wear. Industry estimates that this phe- nomenon costs in excess of $3 per vehicle in repair and warranty costs during the three-year war

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