Well, the cold temperatures are here and vibrations at idle while in gear are also present (for example stopped at a red light with foot on the brake). I really can't explain why this is occuring, but cold weather affects idle vibrations. All my motor mounts are OEM and brand new. When the temperature outside gets warmer like spring or summer the vibrations decrease for sure. But why?? I have a 2006 Accord Sedan 4-cyl. with 81k miles. No vibrations at all in Reverse, Park, or Neutral. Vibrations occur only in drive in cold weather. If I turn my headlights on while in drive and foot on the brake while idiling the vibrations decrease alot because the computer will increase the rpm's. Is this happing to others?