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If the first-generation Mazda headlights start making a buzzing sound, the problem is most likely in the lens, which controls the lens. Inside the headlamp is a motor, lens and a reostat. The problem is related to the ostat. The contact plates need to be cleaned and handled by means of contact, as well as a little pressure of the metal case, so that the reostrata motor is moving with a small load, but not stalling. When the specified operations are performed, the buzzing sound must be lost.