I've just purchased a 2009 Mazda 6. I've really enjoyed my first few days of driving the car as its powerful, refined and handles very well. My only concern is an engine noise which occurs in first, second and third between 1300-1700 rpm. It seems to be from behind the dash board on the passengers side. It sounds to be a rotational/whirring noise, at odds with the quiet engine, it kicks in at about 1300 and then disappears after I pass 1700 rpm. Is this normal or do you think something could be wrong? Thanks