I have a manual-transmission 2008 Mazda 3 I. For the past day or two, I have detected a somewhat quiet metallic vibration noise coming from the front-end of my car. Some things I have noted:
- The noise seems to increase when I turn sharply one way or the other.
- The nosie seems to increase when I take my foot off the gas - while accellerating, it is more or less gone.
- Pushing in the clutch or taking the car out of gear while moving seems to have no effect.
- Pressing on the brakes very lightly seems to slightly increase the noise.
- Braking harder (e.g. when slowing down to a full stop) seems to make the noise go away entirely.
Also, for what it's worth, my balance/alignment is good according to my mechanic a few weeks ago, and I have new (i.e., not warped) brake rotors. I also have not noticed any extra build-up of brake dust or smoke or a smell coming from my front brakes, so I don't think I have a caliper that's sticking.
I recently replaced my brake pads and rotors, and since taking the car out of gear not helping seems to imply that the noise isn't coming from the transmission, my brakes seem like the likely culprit.
Are these symptoms consistent with poorly lubricated brakes / brake calipers that aren't able to move freely?