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While an occasional squeal is often nothing to be concerned about, regular noise probably means that you should seek expert brake repair help. Some of the situations that call for brake repair help are described below. Squealing Any noise from your brakes that goes on even when you are not braking is a sign that your brake pads may be worn out. When this happens, you should take your car to a reputable service for a thorough brake system inspection. If you hear a louder squeal than usual whenever you apply the brakes, your brake linings have probably crystallized, and their function is possibly impaired.