Many shops will recommend they be replaced because they are so inexpensive now that it costs more to machine the old used ones. That doesn't mean they MUST be replaced unless they will be below the minimum legal thickness after they're machined. Many new rotors are close to that legal limit now to save weight so they don't last the life of the vehicle like they did in the 1970s.
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Friday, March 18th, 2011 AT 12:07 AM