Mine is a very noticeable irregular "shake" that can be felt throughout the entire car. No vibrating "noises" are heard.When you guys say shake do you mean a slight vibration. Very minimal vibration or lots of vibration. Small engines use balance shafts that reduce vibration, but it can't get rid of all vibration so there will be some vibration and that is normal.
^ This! Great description of the issue.Mine does this as well.
Slight shudder at idle every few seconds, very intermittent, and no perceptible change registered by the tachometer and no CEL. It almost feels like a misfire, and happens regardless of fuel. I've only got 5800 miles on mine.