Thank you, friendships for your help .. I will perform the tests that you recommend. He had placed the car on some supports separating the front wheels, and turned on the engine and vibration in the steering wheel does not appear. Place in progress D, and the vibration is minimal .. the normal. But when brakes apply the vibration appears and is heard as a sombid in the cabin.
As I tell you, I will do the evidence I recommend, but I wanted to tell you the test you perform.
Thank you.