Chosen Solution

The device keeps making a rattling noise, how can I get this to stop?

There two main causes for the rattling noises heard in the Motorola Moto G 2nd Gen are loose buttons and poor quality vibration motors. To lower the effect of the rattling, some temporary solutions are to turn off vibration, or get a case that should reduce the noise. If the cause is a loose button, then open up the back cover and place a piece of paper or tape in the area between the button and back cover. If you think that the vibration motor is the cause, here is a repair guide: http://forum.xda-developers.com/moto-g/h