Infiniti has had a history of using fairly weak rotors that tend to warp fairly easily.
Any dealership should be able to at least turn the rotors for you under warranty. If you go to a dealer and they give you grief over it, I would HIGHLY recommend talking to their service manager and complain about it. Infiniti dealers are VERY subject to CSI ratings and usually the service manager will do anything in his power to remedy the situation so that you give them a good score on the survey.
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