I have a 2014 Mazda 3. It has a low level, constant rattle (above 25mph) on the front passenger side. It is steady, not super loud, but I can hear it above the radio. It is making me crazy. I have seen other posts about a "tick" sound, but this is a steady and continuous rattle. It sounds like bad radio static, even when the radio isn't on, and I hear it from the front of the dashboard. Thoughts?