New to site...hello! I have been chasing a rattle on my 2003 G35 Sedan for 2 years! Driver side front. EVERYTHING has been replaced....rattle still there! 10 mechanics and 3 Infiniti dealers later...STILL THERE! It is a slight Rat-a-tat-tat (2-3 separate) when on certain road conditions. Meaning...perfect road and it rides like it's 2003. Huge hole and it.may not happen or hear it. Typical not perfect road and you will hear the rattle. Again, EVERYTHING has been replaced. Anyone else having this experience?

 

The typical culprit would be catalytic converter heat shields, but typically you would hear the sound coming from the middle of the car.

If you open the door and rock the car side to side by pushing up on the roof (be careful not to pop the sash trim loose) can you replicate the sound?

Check for any missing fasteners on the wheel well, front bumper cover, etc. Plastic rattling on metal can make a lot of noise.

 

Moderator EDIT: Merging duplicate threads.

 

i have a 2007 and im dealing with same issue as well. i think in my case its the little metal parts that connect the trans lines or power steering lines. if not a bolt underneath the car that is half way screwed in